Skeletal Muscle Mass Percentage Research Articles

Alterations in Thyroid Hormones in Obese Patients are Associated with Body Composition Changes after Bariatric Surgery.

This study investigates how metabolic/bariatric surgery (MBS) affects thyroid hormone (TH) levels and TH resistance in obese euthyroid individuals, focusing on their correlation with changes in body composition. We included 470 obese individuals and 118 controls for baseline assessment, and 125 obese patients receiving MBS for longitudinal study. Data on body composition and thyroid function were collected. Correlations between baseline and changes in thyroid function and body composition were assessed. In the obese group, thyroid stimulating hormone (TSH), free triiodothyronine (fT3) levels, and thyroid feedback quantile-based index (TFQI) were elevated and significantly decreased post-MBS, along with visceral fat area (VFA) and body fat percentages, while skeletal muscle mass (SMM) percentage increased. Preoperative partial correlation analysis adjusted for age and sex revealed that TSH positively correlated with VFA (r=0.109, P=0.019), body fat percentage (r=0.114, P=0.013), and negatively correlated with SMM percentage (r=-0.104, P=0.024). Similar correlations were observed between central TH resistance indices and body composition, but no significant correlations were found in the control group. Post-MBS, decreased TSH positively correlated with decreased VFA (r=0.251, P=0.006) and increased SMM percentage (r=0.233, P=0.011). While reductions in VFA and body fat percentage were linked to improved central thyroid hormone resistance, a decrease in peripheral TH conversion was noted. MBS significantly impacts thyroid function and TH resistance, with notable correlations to changes in body composition.

INFLUENCE OF DIETARY HABITS ON BODY COMPOSITION IN LEBANESE ACTIVE UNIVERSITY STUDENTS: A GENDER SPECIFIC ANALYSIS

Problem Statement: The unhealthy lifestyle behaviors that university students face comprising sedentary behaviors are associated with weight gain and obesity in this critical life age. Purpose: The purpose of the study is to explore the effect of dietary habits on body composition parameters in Lebanese Active University Students according to gender. Methods: A sample of 200 students from the Lebanese University, faculty of education, physical Education department were studied. The standardized Dietary questionnaire (Turconi et al., 2003) was used to assess the dietary habits of the participants. Body Composition was assessed using the method of multifrequency bioelectrical analysis. Five body composition parameters were assessed: Body Height, Body Mass, Body mass index, Percentage Body Fat mass, and percentage of Skeletal Muscle mass. Results: Lebanese Physical Education students showed satisfactory results and scored above average in the four sections of the nutrition survey. Regarding gender-based classification, males showed better scores in sections of dietary habits and nutrition knowledge, while females showed better scores in physical activity rated level, and nutrition beliefs. Regarding Body Composition, Lebanese students were found in normal body weight. The multiple regression analysis technique showed that the dietary habits factor has mild to moderate influence on body composition specifically on its three tested dependent variables: BM, BFM, and SMM. Conclusion: Findings support the need from educational and health authorities to develop and evaluate health-promotion and obesity-prevention programs for university communities especially for female gender with regular healthy lifestyle monitoring and standardized assessments.

Nutrition status of elite Jiu-Jitsu athletes during training season

Optimizing high-intensity Jiu-Jitsu requires careful nutritional consideration, impacting body composition and performance. Balancing dietary intake with expenditure enhances athlete performance. This study, conducted with ten healthy Jiu-Jitsu athletes from the Jiu-Jitsu Association of Thailand, scrutinized their dietary intake compared to recommendations and its correlation with body composition to enhance performance and training adaptations. Participants completed three days of 24-hour dietary recalls. body composition was assessed using bioelectrical impedance analysis. Across both genders, total energy intake is inadequate, with carbohydrate consumption falling significantly below the recommended levels (p < .05). Female athletes showed significant positive correlations between dietary intake and body composition, notably with protein intake and skeletal muscle mass percentage and the skeletal muscle mass index (r = .895, and .963, respectively, p < .05). Conversely, male athletes displayed no significant correlations, but a broader analysis across genders revealed a strong positive correlation between protein consumption and muscle mass (r = .685, p < .05). The study highlights inadequate dietary intake, particularly in carbohydrates, among Jiu-Jitsu athletes during training, potentially compromising competition performance due to insufficient energy sources. Addressing these nutritional deficiencies is crucial to optimizing performance and body composition, emphasizing the need for dietary practice improvements among Jiu-Jitsu athletes.

Reference values of skeletal muscle mass for children in Nanjing area

Objective: To establish the reference values and growth curves of skeletal muscle mass among children in the Nanjing area. Methods: A cross-sectional study was conducted with children who underwent physical examination at the Department of Child Health Care, Children's Hospital of Nanjing Medical University from 2020 January to 2022 September. Their height, weight, body fat mass and skeletal muscle mass were measured. Body mass index, percentage of body fat mass, percentage of skeletal muscle mass, relative skeletal muscle mass index and the ratio of skeletal muscle to body fat were calculated. The associations between skeletal muscle mass indices and physical measurements index were analyzed through the Spearman correlation test. The Mann-Kendall test was used to assess the trend for skeletal muscle mass. Generalized additive models for location, scale and shape were used to construct percentile reference values and growth curves of male and female skeletal muscle mass indices at different ages. Results: A total of 32 690 children aged 4-14 years were enrolled in this study, including 19 912 boys (60.91%). Skeletal muscle mass, percentage of skeletal muscle mass, relative skeletal muscle mass index and the ratio of skeletal muscle to body fat of boys and girls was 11.10 (8.40, 14.90) and 10.30 (7.90, 13.20) kg, 40.36% (37.01%, 43.13%) and 39.38% (36.43%, 41.88%), 6.70 (6.07, 7.52) and 6.33 (5.79, 7.00), 2.39 (1.46, 3.47) and 2.14 (1.45, 3.00) kg/m2, respectively. Skeletal muscle mass of both boys and girls was all positively associated with weight (r=0.97, 0.96), body mass index (r=0.68, 0.63) and percentage of body fat mass (r=0.40, 0.43) (all P<0.01). The reference values and growth curves showed that the percentage of skeletal muscle mass P50 ranged from 37.75%-44.61% in boys and from 36.22%-40.55% in girls. The relative skeletal muscle mass index P50 ranged from 5.80-9.68 kg/m2 in boys and from 5.57-7.98 kg/m2 in girls. The ratio of skeletal muscle to body fat P50 ranged from 1.86-2.67 in boys and from 1.29-2.41 in girls. There was an increasing trend with age for both boys and girls in the growth of skeletal muscle mass (Z=4.20, 3.75, both Ptrend<0.01), and increased slightly before 9 years of age and then increased rapidly until 14 years of age in both boys and girls. Conclusions: The skeletal muscle mass indices change with age and gender during childhood. Percentile reference values for pediatric skeletal muscle mass indices can be used to evaluate the muscular growth and development in children in the Nanjing area.

Healthy aging with sport: A case-report of an 81 years-old Italian man

Age-related decreases in endurance performance are well known. However, several researches have been carried out on octogenarian athletes, who achieved high performance in some endurance sports. This case report aimed to discuss exercise capacity, body composition and the cardiovascular and common risk factors of an 81-year-old man with a high level of physical activity. The man had a body mass index of 25.59 kg/m2 with a high percentage of skeletal muscle mass (79%). Maximal oxygen uptake was 39.5 mL/min/Kg and oxygen pulse was 18.7 mL/beat showing an excellent exercise capacity. Heart and pulmonary functions were optimal for his age. Bioelectrical phase angle was higher than the average values for his age and gender. Physical activity carried out continuously is confirmed a predictor of healthy state in elderly age, however it is mandatory that master athletes carry out periodic checks of their state of health and monitor vital parameters during intense training.

Assessment of Changes in Body Composition After 3 Months of Dulaglutide Treatment.

Changes in body composition accompanied by glucagon-like peptide 1 receptor agonist (GLP-1RA) induced weight loss have drawn much attention. However, fewer studies have reported body composition changes in patients receiving dulaglutide therapy in Chinese population. A total of 70 overweight/obese type 2 diabetes mellitus (T2DM) patients who received dulaglutide therapy were included. Clinical data were collected. Visceral fat area (VFA) and body composition were also measured. Changes in clinical indicators and body composition of patients before and after intervention were also analyzed. Correlation analysis and multiple linear regression model were used to evaluate the association between hemoglobin A1C (HbA1c) and body composition. The results showed that body weight (BW), VFA, body fat (BF), lean body mass (LBM), skeletal muscle mass (SMM) and water content were reduced after 3 months dulaglutide intervention. The lean body mass percentage (LBMP) and skeletal muscle mass percentage (SMMP) significantly increased. Moreover, there was no significant difference in bone mineral quality (BMQ) after the intervention. The multiple linear regression model revealed that the % change in BF was independently associated with % change in HbA1c (β = 0.449, t = 3.148, p=0.002). These results indicate that dulaglutide intervention does not cause muscle and bone mass loss while inducing weight loss, and % change in BF was independently associated with improved glucose control during dulaglutide therapy. This study offers some positive results to support the clinical application of dulaglutide.

Association between Controlling Nutritional Status (CONUT) Score and Body Composition, Inflammation and Frailty in Hospitalized Elderly Patients.

a total of 361 patients were retrospectively recruited and divided into three groups based on the CONUT score. patients with a score ≥5 exhibited significantly higher levels of inflammatory markers, such as erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), Neutrophil/Lymphocytes ratio (NLR), main platelet volume (MPV), and ferritin, compared to those with a lower score. Furthermore, these patients showed unfavorable changes in body composition, including a lower percentage of skeletal muscle mass (MM) and fat-free mass (FFM) and a higher percentage of fatty mass (FM). A positive correlation was found between the CONUT score and inflammatory markers, Geriatric Depression Scale Short Form (GDS-SF), and FM. Conversely, the Mini Nutritional Assessment (MNA), Mini-Mental Status Examination, activity daily living (ADL), instrumental activity daily living (IADL), Barthel index, FFM, and MM showed a negative correlation. Frailty was highly prevalent among patients with a higher CONUT score. The receiver operating characteristic (ROC) curve demonstrated high accuracy in identifying frail patients (sensitivity). a high CONUT score is associated with a pro-inflammatory status as well as with unfavorable body composition. Additionally, it is a good tool to identify frailty among hospitalized elderly patients.

Tabata protocol-based high-intensity interval training in freestyle wrestlers

Background and Study Aim. The physical attributes of muscular strength and endurance are essential for wrestlers to perform successfully. For the development of these physical qualities, high intensity interval training (HIIT) using kettlebell strength exercises is appropriate. The purpose of this study was to develop a kettlebell HIIT program for wrestlers and evaluate the results on strength and endurance. Material and Methods. Eight freestyle wrestlers who participated in the Bulgarian Wrestling Championships (age: 22.0±2.17 years, wrestling experience: 9.9±2.80 years) were included in the study. Measurements included height, weight, 8 circumferences, 8 skinfolds, and BMI, body fat percentage (%BF), and skeletal muscle mass percentage (%SMM). The wrestlers engaged in an HIIT circuit that involved four rounds of 16 kg kettlebells and eight exercises, each lasting 20 seconds to complete and 10 seconds to recover between. Polar H7 was used to continually record heart rate (HR). At rest, before, immediately after, and 15 minutes after the HIIT, blood lactate concentration (La) was assessed. Each exercise's number of repetitions was noted. Results. The wrestlers' average height was 175.2±7.45 cm, their average weight was 85.1±13.38 kg, and their average BMI was 27.6 kg/m2. The SMM was 42.1±2.39%, and the BF was 10.3±3.98%. Heart rate (HR) exhibited a pattern of elevation from rest to warm-up and during circle 1 to 4, followed by a decrease 10 minutes after HIIT. Lactate levels (La) displayed an upward trend from rest to before HIIT, a significant increase after HIIT, and a decrease 15 minutes after HIIT. Conclusions. As shown by the fact that each wrestler's HR during the kettlebell HIIT was above 75% of HRmax and that La was above the anaerobic threshold (&gt;4 mmol/L), the created kettlebell HIIT, when used 5 times per week for eight weeks as part of the wrestlers' training, can improve their endurance.

The Influence of Body Composition on Sagittal Plane Posture among Elementary School-Aged Children.

Proper posture, characterized by the appropriate alignment of the cervical, thoracic, and lumbar segments of the spine, enables these regions to maintain their normal curvature. Body composition is recognized as one of the factors that can influence overall postural alignment of the spine. The objective of this study was to determine the influence of the parameters of body composition on the prevalence of postural disorders in the sagittal plane. The cross-sectional study was conducted on 152 children of both genders (78 boys), at a mean age of 11 years ± 6 months. In order to evaluate postural disorders, the Formetric 4D System, a tool manufactured by Diers, Schlangenbad, Germany was used. Based on its output data, the following variables were obtained: hyperkyphosis, hyperlordosis, kypholordosis, flatback, and normal alignment of the body in the sagittal plane. The evaluation of body composition parameters was conducted using the InBody 770 device. To determine how body composition influences the postural status of the spinal column, a discriminant analysis was employed. The results showed that approximately 65.8% of children exhibit various types of postural disorders when assessing the alignment of the spine in the sagittal plane. The most prevalent disorder observed was hyperkyphosis, affecting 34.2% of the subjects, followed by kypholordosis at 16.4%. Moreover, the results demonstrated that body composition significantly influences body posture (p = 0.004). An increase in fat mass corresponds to a deviation from normal body posture, whereas an increase in the percentage of skeletal muscle mass and fat-free mass is associated with a reduction in postural abnormalities in the sagittal plane. Considering the results, it is clear that body composition parameters serve as more reliable predictors of the influence on body posture compared to simply calculating the body mass index. Furthermore, it can be concluded that there are consistent patterns of influence by specific body composition parameters, including fat mass, percentage of skeletal muscle, and fat-free mass, on body posture among children from various climates. These results underscore the significance of implementing strength exercises in children, particularly during periods of rapid growth and development, as a means of preventing and correcting postural disorders.

The effect of fat distribution and nutritional behavior on balance and equilibrium of acrobatics and tumbling athletes

Acrobatics and Tumbling (A&amp;T) is an emerging sport in the United States; balance and equilibrium are critical components of performance in this sport. Therefore, the aim of this study was to identify if body composition, fat distribution, and nutritional behavior affect the balance and vertical jump of A&amp;T athletes. Body mass index (BMI), whole body percentage of fat and skeletal muscle, and fat distribution of top and base A&amp;T athletes from Fairmont State University were assessed using an impedance device (In Body 570). Nutritional behavior was assessed by a 3-day food log. Balance was measured by the time of holding a handstand in seconds. BMI, whole body, and truncal fat percentage were higher in base athletes when compared to tops (p˂0.05). When associating balance with the variables, skeletal muscle mass was positively associated with balance (r=0.49, p˂0.05), and the percentage of fat and fat accumulation in the lower limbs were negatively associated (r=-0.47 and -0.48, respectively p˂0.05). When the association was tested within the position, the percentage of skeletal muscle mass and fat was only associated with balance in top athletes. Thus, training strategies to increment skeletal muscle mass and decrease body fat should be the focus to improve the balance of top A&amp;T athletes.

CHANGE OF DIRECTION SPEED UNDER TWO LOADING CONDITIONS AMONG FEMALE POLICE OFFICERS: ASSOCIATION WITH BODY MORPHOLOGY

Change of direction speed (CODS) is an important performance ability for police officers. This is even more emphasized when officers perform tasks while carrying their occupational load (e.g., protective vest, weapon, radio, cuffs, etc.). The absolute weight of the equipment remains the same regardless of officer’s body size and weight, which is of importance for female police officers whose morphology is different than in males. This study investigated the associations between selected measures of body morphology and CODS among female police officers under two loading conditions. The sample consisted of 29 female police officers (age = 32.00±5.09 yrs, body height = 162.92±5.01 cm, and body mass = 70.88±13.42 kg). Anthropometric variables included height, weight, and body mass index (BMI), while body composition characteristics included percent body fat, (PBF), percentage of skeletal muscle mass (PSMM), and index of hypokinesia (IH). CODS was assessed using the Illinois agility tests under loaded (LIAT) (10 kg vest) and unloaded (IAT) conditions. Participants’ CODS times were significantly slower in the LIAT condition (p &lt; 0.001). IAT correlated to BMI (r=0.479, p&lt;0.05), PBF (r=0.647, p&lt;0.001), PSMM (r=-0.655, p≤0.001), and IH (r=0.462, p&lt;0.05). Similarly, LIAT was associated with BMI (r=0.446, p&lt;0.05), PBF (r=0.651, p&lt;0.001), PSMM (r=-0.672, p&lt;0.001), and IH (r= 0.503, p&lt;0.01). These findings highlight the need for developing specific physical training programs aimed at improving and maintaining healthy body composition levels among female officers if improved CODS is the goal.

Effects of 8 weeks of resistance training in combination with a high protein diet on body composition, muscular performance, and markers of liver and kidney function in untrained older ex-military men.

The effects of a high protein diet in combination with chronic resistance training (RT) on skeletal muscle adaptation responses in untrained older ex-military men is unknown. Therefore, we compared the effects of 8 weeks of RT in combination with either a high (1.6 g/kg/d) or low protein diet (0.8 g/kg/d) on body composition [skeletal muscle mass (SMM) and body fat percentage (BFP)], muscular strength, power, and endurance (upper and lower body), markers of liver [alanine transaminase (ALT), aspartate aminotransferase (AST), and gamma-glutamyl transferase (GGT)] and kidney (creatinine and urea) function, and lipid profile low-density lipoprotein (LDL), high-density lipoprotein (HDL), and cholesterol levels in a cohort of healthy, untrained older ex-military males. Forty healthy untrained older ex-military males (age: 61 ± 2 yr, body mass index: 23.2 ± 1.3 kg.m-2) performed 8 weeks (three sessions·w-1) of RT with either 1.6 g/kg/d (RHP; n = 20) or 0.8 g/kg/d of protein (RLP; n = 20). Body composition (assessed by Inbody 720), muscular strength (1-RM for chest and leg press), power (Wingate test), endurance (75% 1-RM for chest and leg press), and markers of liver and kidney function (biochemical kits) were assessed pre and post-intervention. SMM and muscular strength (upper and lower body) increased post-intervention in both groups and were significantly greater in RHP compared to RLP, while muscular power increased to the same extent in both groups (p < 0.05) with no between-group differences (p > 0.05). In contrast, there were no post-intervention changes in muscular endurance, HDL, and BFP remained in either group (p > 0.05). ALT and creatinine significantly increased in RHP compared to RLP while GGT, AST, and urea only increased in the RLP group (p < 0.05). LDL and cholesterol significantly decreased in both groups (p < 0.05). A daily intake of 1.6 g/kg/d protein was superior to 0.8 g/kg/d (current recommended daily intake) for promoting greater improvements in SMM and muscle strength and thus may be a more suitable level of intake for promoting such adaptive responses. Notwithstanding observed between-group differences in ALT and creatinine and the fact that levels remained within normal ranges, it is feasible to conclude that this daily protein intake is efficacious and well tolerated by healthy, untrained older ex-military males.

Diagnostic value of anthropometric indicators and body composition as indicators of aging rates and comorbidity in patients with cardiometabolic diseases

Objective — to assess anthropometric indicators and body composition in patients with certain cardiometabolic diseases depending on their aging rates and the number of existing comorbid pathologies.&#x0D; Materials and methods. Examinations involved 92 patients with cardiometabolic diseases, including arterial hypertension (AH), non‑alcoholic fatty liver disease, obesity, dyslipidemia, insulin resistance. Female prevailed among patients (62.0%), the mean age was 49.2 [41.4; 55.4] years. All patients were divided into groups depending on calendar age (CA): young &lt;45 years (n=32), middle age 45—59 years (n=49), elderly &gt;60 years (n=11), and also divided by the rates of aging: with accelerated age delta (Δ) &gt;0 years (n=14), with significantly slowed rates of ageing — Δ ≤–5 years (n=51) and intermediate ones — Δ ∈ (–5; 0] years (n=27). Anthropometric parameters and calculated indices were determined in all patients and included body mass index (BMI), waist circumference (WC), hip circumference (HC), WC/HC ratio, percentage of total fat (TF), percentage of skeletal muscle mass (SM), visceral fat (VF), weight‑adjusted waist index (WWI), a body shape index (ABSI) and abdominal volume index (AVI). As additional indicators of aging, the level of uric acid, the total mortality risk during the next 10 years (MR) and the level of global methylation (GM) of DNA were determined.&#x0D; Results. Significant differences between all groups divided according to CA were in BA and MR (p=0.0001 in all cases). Patients &lt;45 years of age compared to the elderly had significantly higher rates of aging (p=0.019) and significantly lower levels of BMI (p=0.039), WC (p=0.034), WWI (p=0.002) and AVI (p=0.032). WWI was the only marker that significantly increased in the middle‑aged group of patients (p=0.033) compared to young patients. Patients re‑divided into groups according to  did not differ in the levels of anthropometric indicators and body composition. However, patients with significantly slower rates of aging had significantly lower uric acid levels compared to the group with accelerated (p=0.0001) and intermediate rates of aging (p=0.024), and also had higher CA compared to patients in the intermediate group (p=0.026). Various indicators of aging were significantly associated with weight, BMI, VF, WC, WC/HC, WWI and AVI, but only WC and AVI were simultaneously associated with all markers of aging (uric acid, BA, MR, GM). Only WWI was associated with CA, in addition it had the strongest association with BA and MR compared to other indicators. Patients with 4—5 comorbid pathologies had worse weight (p=0.045), BMI (p=0.0001), WC (p=0.002), WC/HC (p=0.002), TF (p=0.004), SM (p=0.010), WWI (p=0.006), AVI (p=0.002), WWI (p=0.040) and aging rates (p=0.008).&#x0D; Conclusions. Among anthropometric and body composition parameters in patients with cardiometabolic pathology, WWI is probably the most effective one for monitoring premature aging, as it is associated with both CA, markers of aging and cardiometabolic parameters. The higher calendar age among patients with cardiometabolic pathologies was accompanied by higher values of BMI, WC, WWI and AVI, so control of these indicators may be useful for prevention of premature aging. Assessment of weight, BMI, WC, WC/HC, TF, SM, WWI and AVI is effective for predicting aging rates among patients with multimorbidity.

Establishing reference values for percentage of appendicular skeletal muscle mass and their association with metabolic syndrome in Korean adolescents.

The association between appendicular skeletal muscle mass (ASM) and cardiometabolic risk has been emphasized. We estimated reference values of the percentage of ASM (PASM) and investigated their association with metabolic syndrome (MS) in Korean adolescents. Data from the Korea National Health and Nutrition Examination Survey performed between 2009 and 2011 were used. Tables and graphs of reference PASM were generated using 1,522 subjects, 807 of whom were boys aged 10 to 18. The relationship between PASM and each component of MS in adolescents was further analyzed in 1,174 subjects, 613 of whom were boys. Moreover, the pediatric simple MS score (PsiMS), the homeostasis model assessment of insulin resistance (HOMA-IR), and the triglyceride-glucose (TyG) index were analyzed. Multivariate linear and logistic regressions adjusting for age, sex, household income, and daily energy intake were performed. In boys, PASM increased with age; the trend was different in girls, in whom PASM declined with age. PsiMS, HOMA-IR, and TyG index showed inverse associations with PASM (PsiMS, β=-0.105, P<0.001; HOMA-IR, β=-0.104, P<0.001; and TyG index, β=-0.013, P<0.001). PASM z-score was negatively associated with obesity (adjusted odds ratio [aOR], 0.22; 95% CI, 0.17-0.30), abdominal obesity (aOR, 0.27; 95% CI, 0.20-0.36), hypertension (aOR, 0.65; 95% CI, 0.52-0.80), and elevated triglycerides (aOR, 0.67; 95% CI, 0.56-0.79). The probability of acquiring MS and insulin resistance decreased as PASM values increased. The reference range may offer clinicians information to aid in the effective management of patients. We urge clinicians to monitor body composition using standard reference databases.

Perceived Physical Literacy Is Associated with Cardiorespiratory Fitness, Body Composition and Physical Activity Levels in Secondary School Students.

Overweight and obese adolescents are often associated with lower Physical Activity (PA) levels and low Cardiorespiratory Fitness (CRF). Recently, the concept of Physical Literacy (PL), has been suggested to be associated with higher levels of active behavior and better health in adolescents. The purpose of this study is to investigate the relationships between PL, body composition, cardiorespiratory fitness and physical activity levels in French secondary school students. The level of PL was assessed in 85 French adolescents using a French version of the Perceived Physical Literacy Instrument (F-PPLI). Cardiorespiratory fitness was measured by the "20 m adapted walk/shuttle run test". The PA level was assessed by the Youth Risk Behavior Surveillance System questionnaire. Weight status was measured by the Body Mass Index (BMI) and the body composition data. We find a significant association between the PL and the percentage Fat Mass (%FM) (r = -0.43; p ≤ 0.01), between the PL and moderate to vigorous PA (MVPA) per week (r = 0.38; p ≤ 0.01). The PL was associated (r = 0.36; p ≤ 0.01) with the percentage of Skeletal Muscle Mass (%SMM) and cardiorespiratory fitness (r = 0.40; p ≤ 0.05). Developing the PL for the most disadvantaged secondary school students in a PA program could be a suitable strategy to increase their PA level, reduce their adiposity, and promote better long-term health.

Eating behavior-mediated association between attention deficit hyperactivity disorder and body fat mass

BackgroundAdverse eating behaviors and a high rate of obesity have been identified among children diagnosed with attention deficit hyperactivity disorder (ADHD). In this study, we investigate the relationships between eating behaviors and body fat mass among children with ADHD. MethodsAll participants were recruited from the Children's Health Care Department of the Children's Hospital of Nanjing Medical University from June 2019 to June 2020. ADHD was diagnosed according to the diagnostic criteria of the 5th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) by psychiatrists. Core ADHD symptoms defined by the DSM-5 were inattention and hyperactivity/impulsivity. The anthropomorphic indices defined by the World Health Organization (WHO) were utilized in this study (body mass index [BMI], underweight, normal body mass, overweight, obesity, short stature). Body fat mass, fat mass percentage (FM%), skeletal muscle mass, skeletal muscle mass percentage (SMM%) were tested via body composition meter, and eating behaviors were assessed by parents using the Chinese version of the Children's Eating Behavior Questionnaire (CEBQ). The CEBQ was comprised of subscales related to food avoidant behaviors (satiety responsiveness, slowness in eating, fussiness, and emotional undereating) and food approach behaviors (food responsiveness, enjoyment of Food, desire to drink, and emotional overeating). The associations among ADHD, obesity and adverse eating behavior were tested through correlation analysis, and a mediating effect model was established to explore the effect of eating behaviors. ResultsA total of 548 participants aged 4–12 years were recruited. Among them, 396 were diagnosed with ADHD, with the remaining 152 enrolled in a control group. Compared with the control group, the ADHD group had higher incidences of overweight (22.5% vs. 14.5%) and obesity (13.4% vs. 8.6%) (p < 0.05). The ADHD group was more likely to display “slowness in eating” (11.01 ± 3.32 vs. 9.74 ± 2.95), “fussiness” (15.61 ± 3.54 vs. 15.03 ± 2.84), “food responsiveness” (11.96 ± 4.81 vs. 9.88 ± 3.71) and “desire to drink” (8.34 ± 3.46 vs. 6.58 ± 2.72) (p < 0.05). Moreover, The FM% of children with ADHD was positively correlated with inattention (β = 0.336, 95% CI: 0.001 to 0.673) and “food responsiveness” (β = 0.509, 95% CI: 0.352 to 0.665) in the multiple linear regression model. The mediation effect model showed that “food responsiveness” accounted for a significant portion (64.2%) of the mediating effect. ConclusionChildren with ADHD had higher prevalence of overweight and obesity. As an important risk factor, food responsiveness may connect core symptoms of ADHD with obesity.

Body Composition and Physical Activity of Female Police Officers: Do Occupation and Age Matter?

This study aimed to investigate the differences in the body composition and volume of leisure time physical activity (V-LTPA) of female police officers from two police occupations and to assess the differences when officers are matched by age. Body composition measures including body mass index (BMI), percent body fat (%BF), and percent of skeletal muscle mass (%SMM) of female communal police (n = 56) and general police (n = 90) were compared. Officers were allocated into three age groups: 29 years and younger, 30–39 years, and 40 years and older. We used an independent samples t-test, analysis of variance, and multiple analyses of variance to investigate the differences between occupations, between age groups, and between-occupation-within-age differences in body composition. Communal police officers had significantly (p &lt; 0.05) lower BMI and %BF and higher %SMM compared to general police. Significant differences were found between age groups, with the youngest officers having lower BMI and %BF and higher %SMM and V-LTPA. Finally, differences in body composition were no longer significant when officers from different occupations were compared within age groups. Police agencies should consider supporting and motivating officers through policies to encourage leisure time physical activities for female officers. Other mechanisms for the management of body composition should also be considered.

THE IMPACT OF WELL-PLANNED TRAINING ON CHANGING SEDENTARY LIFESTYLE HABITS

ABSTRACT Introduction: A sedentary lifestyle is one of the biggest health problems of the 21st century. The role of the trainer in motivating the sedentary individual is crucial. Also, there is a growing accessibility to gyms today, especially outdoor gyms, as a novel way to motivate people to train. Objective: The aim of the study was to evaluate the impact of regular combined indoor and outdoor physical activity on anthropometric and functional parameters and the adoption of a more active lifestyle. Methods: The study included 45 participants between 18 and 56 years of age. They underwent 12 weeks of resistance training, focusing on chest presses and leg presses. Height, weight, bioelectrical impedance, chest and leg press one-repetition maximums, push-up and curl-up counts, and sit and reach were measured both before and after the 12-week training program. Results: After 12 weeks of training, male participants showed a significant increase in the percentage of skeletal muscle mass (p&lt;0.05) and a significant decrease in the fat mass percentage (p&lt;0.05). Female participants experienced a significant reduction in the fat mass percentage (p&lt;0.05). Both groups were able to significantly increase their one-repetition maximums for the chest press (p&lt;0.05) and leg press (p&lt;0.05). Push-up and curl-up counts increased significantly after 12 weeks of training in both sexes, as did flexibility in both sexes. A year after the study, 80% of all participants were still training with a combination of indoor and outdoor physical activities. Conclusions: After 12 weeks of training, the body composition of both female and male participants had changed significantly. Twelve weeks of resistance training significantly increased strength and flexibility in both male and female participants. A well-thought-out training plan seems to be the key factor in motivating a beginner trainee to adopt a more active lifestyle. Level of Evidence IV; Case series.

Low skeletal muscle mass is associated with more severe histological features of non-alcoholic fatty liver disease in male.

Although low skeletal muscle mass is associated with non-alcoholic fatty liver disease (NAFLD), it is currently uncertain whether there are associations between weight-adjusted appendicular skeletal muscle (ASM%), severity of histological features of NAFLD, and the patatin-like phospholipase domain-containing 3 (PNPLA3) rs738409 polymorphism. Our aim was to test for a possible influence of the PNPLA3 rs738409 variant on the association between ASM% and severity of NAFLD histological features. We enrolled 401 Chinese male with biopsy-proven NAFLD. Using a bioelectrical-impedance body composition analyzer (BIA, Inbody 720, Japan Inc., Tokyo), we calculated the ASM% as the percentage of total appendicular skeletal muscle mass (ASM, kg)/total body mass (kg) × 100. Compared to those with high ASM%, patients with low ASM% (≤ 30.6, i.e., the median value of distribution of the whole sample) had a greater severity of individual histological features of NAFLD. These patients also had a higher risk of severe steatosis and non-alcoholic steatohepatitis (NASH) (adjusted-odds ratio [OR] 2.34, 95% CI 1.39-3.93, and adjusted-OR 2.22, 95% CI 1.30-3.77) even after adjusting for age, body mass index, diabetes, and serum creatinine levels. Carriage of the G allele of PNPLA3 rs738409 plus low ASM% was associated with a higher risk of severe steatosis and presence of liver fibrosis (OR 3.02, 95% CI 1.46-6.26, p = 0.003 and OR 2.18, 95% CI 1.03-4.60, p = 0.041 respectively), and there was a non-significant but borderline increased risk of NASH (OR 2.00, 95% CI 0.98-4.06, p = 0.056). Low ASM% and the presence of a G allele within PNPLA3 rs738409 is associated with more severe histological features of NAFLD.

Anthropometric, aerobic and muscle power profile of young Costa Rican basketball players

The purpose of this study was to describe an anthropometric, aerobic and muscle power profile of young Costa Rican basketball players according to sex, play positions and age. The assessment was carried outa on 99 young players (43 women and 56 men; 18 guards, 51 forwards and 30 centers; 42 in the U16 category and 57 in the U18 category) from eight different teams. The sports experience of the players was 6.5 ± 3.1 years. The following parameters were assessed: height, weight, body mass index, skeletal muscle mass and body fat percentage, countermovement test (CMJ) and Yo-Yo Intermittent Recovery Test Level I. The main results showed significantly higher values in men than in women in terms of weight, height, skeletal muscle mass, distance covered in the yo-yo test, VO2max, height in CMJ and in flight time. Body fat percentage was higher in women than in men. Centers showed significantly higher height, weight and body fat percentage than other play positions. Guards and forwards covered more meters in the yo-yo test and showed higher VO2max than centers. No significant differences were found between the U16 and U18 categories in any variable. Regression models showed the influence of weight, body fat percentage, skeletal muscle mass and age on VO2max and CMJ. In conclusion, these indicators varied according to the sex and play position of the players. Additionally, this information will be useful for processes of promotion, development and training design of youth basketball in Costa Rica.