Fitness In Adults Research Articles

The effects of walking on frailty, cognitive function and quality of life among inactive older adults in Saudi Arabia: a study protocol of randomized control trial by comparing supervised group-based intervention and non-supervised individual-based intervention

BackgroundKingdom of Saudi Arabia (KSA) demographics are also changing with the increase in life expectancy in the country and the rise in the number of older Saudi Arabians. Saudi Arabia has a higher rate of physically inactive people, and most of them are between the ages of 55–64. Walking is one of the most prevalent forms of physical activity in Saudi Arabia and the study showed that most people prefer walking for recreational and health benefits. Therefore, the purpose of the proposed study is to compare the effects of supervised group-based walking and non-supervised individual-based walking interventions on frailty, cognitive function and quality of life among inactive older adults in Saudi Arabia.MethodThis study will apply a three-group (2 intervention groups and 1 control group), double-blinded, randomized controlled trial (RCT) to examine the effect of different forms of walking interventions on Saudi Arabia older adults’ frailty, cognitive function and quality of life immediately after a 16-week intervention, as well as the residual effects 12 weeks after completion of the interventions.DiscussionThis study aims to determine whether supervised group walking and non-supervised individual walking lead to different effects. Given the limited evidence in the literature regarding Saudi Arabia older adults’ physical fitness and health, it is worthwhile to explore the effect of walking, as well as the forms of walking on improving the overall physical fitness and psychological status of older adults in Saudi Arabia. The findings of the current study could also create awareness of the government and the general public in Saudi Arabia of the ageing problems and the effective ways of achieving better intervention results.Trial registrationThe trial is registered at the ClinicalTrials.gov PRS (Trial ID: NCT05151575; Date of first posted: 12/07/2021).

Pleiotropic fitness effects across sexes and ages in the Drosophila genome and transcriptome.

Selection varies between categories of individuals, with far-reaching ramifications: Sex-specific selection can impede or accelerate adaptation, and differences in selection between young and old individuals are ultimately responsible for senescence. Here, we measure early- and late-life fitness in adults of both sexes from the Drosophila genetic reference panel and perform quantitative genetic and transcriptomic analyses. Fitness was heritable, showed positive pleiotropy across sexes and age classes, and appeared to be influenced by very large numbers of loci with small effects plus a smaller number with moderate effects. Most loci affected male and female fitness in the same direction; relatively few candidate sexually antagonistic loci were found, though these were enriched on the X chromosome as predicted by theory. The expression level of many genes showed an opposite correlation with fitness in males and females, consistent with unresolved sexual conflict over transcription. The load of deleterious mutations correlated negatively with fitness across genotypes, and we found some evidence for the mutation accumulation (but not the antagonistic pleiotropy) theory of aging.

The long-term impact of the COVID-19 pandemic on physical fitness in young adults: a historical control study

The strength of evidence regarding long-term changes to fitness resulting from the coronavirus disease 2019 (COVID-19) lockdowns is deficient. This two-site retrospective study aimed to investigate the long-term changes in physical fitness among young adults a year after the onset of the pandemic using a robust historical control. University freshmen who underwent physical fitness tests in 2019 and completed a follow-up in 2020 (study group) were included. The primary focus was to compare the current cohort with a historical control group who completed the same tests a year prior (2018). A total of 5376 individuals were recruited, of which 2239 were in the study group. Compared with the control, the study group exhibited a decrease in anaerobic fitness, with an overall difference of −0.84 (95% confidence interval [CI], [−1.33 to −0.36]); declines in aerobic fitness, with a difference of −2.25 [−3.92 to −0.57] for males and −4.28 [−4.97 to −3.59] for females; a reduced explosive fitness (−2.68 [−3.24 to −2.12]); and a decreased upper-body strength in females (−1.52 [−2.16 to −0.87]). The fitness of young adults has been considerably compromised by COVID-19 lockdowns, highlighting the importance of promoting physical activity to prevent long-term health implications.

HAPI Fit: An Exercise Intervention to Improve Peak Aerobic Capacity in Young Adults Born Very Preterm.

Individuals born preterm have reduced aerobic capacity, which could be related to impaired organ development. Their capacity to improve aerobic capacity with exercise training could therefore be limited but this remains unknown. We aimed to test an exercise intervention to improve cardiorespiratory fitness in adults born preterm. 21 very preterm and 37 full-term individuals, aged 18-33 years, took part in a 14-week supervised exercise intervention of cardiovascular, resistance and flexibility training (2 groups and 1 individual sessions/week). Adherence and compliance to intervention was recorded. Primary outcome was change in peak oxygen consumption (peak O2) measured pre- and post-intervention. Within and between-groups differences were estimated using non-parametric tests. Of 219 eligible individuals, 58 were enrolled and 14 participants dropped out over the course of the intervention. Among the 44 who completed the intervention, mean adherence was 82% and 66% for group and individual sessions, respectively. Compliance with training requirement varied between 71-100%. There was no difference in adherence between the preterm and full-term groups. Because only one preterm male met adherence criteria, subsequent analyses were done exclusively on females. Both the term and preterm groups achieved higher peak O2 following the intervention [term = +4.2 (standard deviation 4.3) mL·min-1·kg-1, P < 0.01; preterm = +4.7 (2.9) mL·min-1·kg-1, P < 0.01]. There was no between-group difference in the response to the intervention (P = 0.729). Recruitment and adherence to an exercise intervention are challenging. Results could indicate improvements in cardiorespiratory fitness in young women born preterm following current exercise program. Adaptation of this intervention is needed for wider uptake.

Muscular Adaptations to Concurrent Resistance Training and High-Intensity Interval Training in Adults with Type 2 Diabetes: A Pilot Study.

This pilot study aimed to compare the effects of eight weeks of concurrent resistance training (RT) and high-intensity interval training (HIIT) vs. RT alone on muscle performance, mass and quality in adults with type 2 diabetes (T2DM). Twelve T2DM adults were randomly allocated to the RT + HIIT (n = 5) or RT (n = 7) group. Before and after training, maximal oxygen uptake (VO2max), muscle strength and power were evaluated by calorimetry, dynamometry and one-repetition maximum (1RM) test. Quadriceps muscle volume was determined by MRI, and muscle quality was estimated. After RT, VO2max (+12%), knee muscle power (+20%), quadriceps muscle volume (+5.9%) and quality (leg extension, +65.4%; leg step-up, +223%) and 1RM at leg extension (+66.4%), leg step-up (+267%), lat pulldown (+60.9%) and chest press (+61.2%) significantly increased. The RT + HIIT group improved on VO2max (+27%), muscle volume (+6%), muscle power (+9%) and 1RM at lat pulldown (+47%). No other differences were detected. Among groups, changes in muscle quality at leg step-up and leg extension and VO2max were significantly different. The combination of RT and HIIT effectively improves muscle function and size and increases cardiorespiratory fitness in adults with T2DM. However, HIIT combined with RT may interfere with the development of muscle quality.

Functional fitness trends among older adults in Portugal between 2008 and 2018: Keeping up with a healthy aging process

ObjectivesMaintaining a healthy aging process is vital to combating and delaying the adverse health outcomes faced by the growing older adult population, where a key aspect to achieving healthy aging is the preservation of functional fitness. This study aims to present trends on the functional fitness of Portuguese older adults between 2008 and 2018 and build new normative reference standards for the Senior Fitness Battery Tests. DesignCross-sectional study. MethodsFunctional fitness was measured with the Senior Fitness Battery Tests in two national representative cohorts of the Portuguese older adult population (≥65 years) using the 2008 (n = 4712) and 2018 (n = 2717) surveys. Changes were assessed according to sex and age group. Sex and age-group normative fitness scores were developed. ResultsOverall findings suggested that older adults' point prevalence for arm-curl, 8-ft up-and-go, and 30-s chair sit-to-stand remained stable between 2008 and 2018, with declining trends being observed for the 6-min walk and back-scratch tests. However, results for trends varied when stratified by sex and age categories. ConclusionsOur results suggest a trend toward a stabilization of most of the functional fitness tests over the past decade, but with a critical decline in the 6-min walk test. Thus, this test should be targeted by future health-care policies. Moreover, this investigation provides new and updated normative reference standards for the Senior Fitness Battery Tests that should be used as a tool to promote a healthy aging process among Portuguese older adults.

O.1.1-9 Clinical symptoms and body composition correlates with cardiorespiratory fitness in adults with bipolar disorder: FINEXT-BD study

Abstract Purpose Bipolar disorder (BD) is a mental illness involving mood disorder, characterized by alternating normal mood, manic and depressive symptom. People with BD are associated with an unhealthy lifestyle. Assessment of cardiorespiratory fitness (CRF) indicates the overall health and can be directly measured and assessed by the cardiopulmonary exercise test and peak oxygen uptake (VO2peak), respectively. The CRF in the BD population may be altered due to sex, age, depression symptoms, and inactivity. The aim of this study was to analyze possible correlations of CRF with clinical symptoms and body composition variables. Methods Participants (n = 53, 44.9 ± 13.2 yr old) with BD were assessed with (1) body mass index and fat body mass (FBM) percentage; (2) upright bicycle ergometer using an incremental ramp protocol to get the VO2peak; and (3) symptoms of the disease [Hamilton Depression Rating Scale (HRSD) and Clinical Global Impressions Scale (CGI-S)]. Correlation analyses were performed among clinical symptoms, BMI, and VO2peak. Results The studied population showed overweight based on BMI (29.4±6.8 kg/m2), and obesity taking into account the fat mass percentage (33.6±10.6 %). According to Kaminsky et al., participants were classified in the 40th percentile with a low physical condition (VO2peak =25.8±8.4 mL·kg-1·min-1). Spearman's rho correlation coefficients demonstrated an inverse relationship between VO2peak (mL·kg−1·min−1) and HRSD (B=-0.286; P = 0.040); VO2peak (mL·kg−1·min−1) and CGI-S (B=-0.277; P = 0.047); and VO2peak (mL·kg−1·min−1) and FBM (B=-0.606; P &amp;lt; 0.001). Conclusions In population with BD a significantly higher CRF was detected in those with lower clinical symptoms, as well as lower FBM. Exercise interventions for improving CRF should be promoted in this population to better control clinical symptoms.

Functional connectivity mediates the relationship between cardiorespiratory fitness and stress in midlife.

BackgroundIncreasing evidence suggests that the relation between mental health and physical health is bidirectional and underpinned by complex neural systems. Cardiovascular fitness is a key measure of physical health but its relation to mental health is insufficiently examined. Characterizing the neural mechanisms by which cardiovascular fitness influences mental health could inform the development of strategies to promote mental health and minimize the risk of mental disorders. Methods and resultsThe relation between cardiorespiratory fitness, functional brain connectivity and mental health was studied in 418 healthy middle-aged (aged 40–65 years) adult participants of the Barcelona Brain Health Initiative (BBHI). Higher cardiorespiratory fitness, measured by VO₂ peak, was associated with lower symptoms of anxiety (β = −0.111, p = 0.017) and stress (β = −0.242, p = 0.002) scores, evaluated by the Depression Anxiety and Stress Scale (DASS-21) and its three subscales (stress, anxiety, and depression). Higher within-network functional connectivity of the Default Mode Network (DMN) was associated with higher VO₂ peak (β = 0.195, p = 0.002), and lower stress scores (β = −0.126, p = 0.011). In addition, higher functional connectivity between the Frontoparietal Network (FPN) and Salience Network (SN) was associated with higher VO₂ peak (β = 0.187, p = 0.002), and lower stress scores (β = −0.123, p = 0.016). Both within-DMN [ACME = −0.02 (-0.04,-0.00), p = 0.040] and between FPN-SN [ACME = −0.01 (-0.04,-0.00), p = 0.036] functional connectivity mediated the relationship between cardiorespiratory fitness and stress. ConclusionsThe relationship between the cardiorespiratory fitness and stress in middle-aged adults is mediated by functional connectivity of several intrinsic resting-state networks. These results highlight a potential mechanistic pathway through which higher cardiorespiratory fitness can positively impact brain health in midlife.

Maize pollen diet enhances malaria mosquito longevity and infectivity to Plasmodium parasites in Ethiopia

Although larval diet quality may affect adult mosquito fitness, its impact on parasite development is scarce. Plant pollen from Zea mays, Typha latifolia, and Prosopis juliflora was ultraviolet-sterilized and examined for effects on larval development, pupation rate, adult mosquito longevity, survival and infectivity. The control larvae were fed Tetramin fish food as a comparator food. Four treatment and two control groups were used for each pollen diet, and each experimental tray had 25 larvae. Female An. arabiensis were starved overnight and exposed to infectious blood using a membrane-feeding system. The Kaplan–Meier curves and log-rank test were used for analysis. The Z. mays pollen diet increased malaria mosquito survival and pupation rate (91.3%) and adult emergence (85%). Zea mays and Tetramin fish food had comparable adulthood development times. Adults who emerged from larvae fed Z. mays pollen had the longest average wing length (3.72 mm) and were more permissive to P. vivax (45%) and P. falciparum (27.5%). They also survived longer after feeding on infectious blood and had the highest number of P. vivax oocysts. Zea mays pollen improved larval development, adult mosquito longevity, survival and infectivity to Plasmodium. Our findings suggest that malaria transmission in Z. mays growing villages should be monitored.

The effect of aerobic dancing on physical fitness and cognitive function in older adults during the COVID-19 pandemic-a natural experiment.

During the Coronavirus disease (COVID-19), the physical activity of older adults is at a lower level. The study aimed to examine the effectiveness of aerobic dancing on physical fitness and cognitive function in older adults. We conducted a randomized controlled trial with 34 older adults who were assigned into an aerobic dancing group and a control group. Three dance sessions weekly for 60​min were scheduled for the aerobic dancing group for a total of 12 weeks. Physical fitness, blood pressure, lipids, glucose, cognitive function were assessed before and after the intervention. Baseline adjusted Analysis of Covariance (ANCOVA) was used to determine whether outcome variables varied between groups at pre-test and post-test. Effect size (Cohen's d) was calculated to determine the differences between groups from baseline to post-test. After 12 weeks, we found that the aerobic dancing group showed significant improvement in memory (portrait memory: F​=​10.45, p​=​0.003, d​=​1.18). The Limit of Stability (LOS) parameters in the aerobic dancing group displayed a significant increase after the intervention (right angle: F​=​5.90, p​=​0.022, d​=​0.60; right-anterior angle: F​=​4.23, p​=​0.049, d​=​0.12). Some beneficial effects were found on flexibility, grip strength, balance and subjective well-being (sit and reach: F​=​0.25, p​=​0.62, d​=​-0.40; grip strength: F​=​3.38, p​=​0.08, d​=​0.89; one-legged standing with eyes closed: F​=​1.26, p​=​0.27, d​=​0.50) in the aerobic dancing group. Aerobic dancing training was effective in improving memory and balance ability in older adults during the COVID-19 pandemic in China. In the future, aerobic dancing is a promising tool to encourage physical activity in older adults.

Sublethal Exposure Enhances Suspectibility to Phoshine and Effects Certain Fitness Traits in Red Flour Beetle &lt;i&gt;Tribolium castaneum&lt;/i&gt; (Herbst)

The insecticidal gaseous phosphine would fail to meet the required concentration owing to improper sealing in a majority of bulk storage units. The resulting sublethal concentration has toxicological and biological implications for the target pests. The red flour beetle Tribolium castaneum has developed considerable resistance to phosphine. In this study, the effect of sublethal phosphine (LC25 and LC40) dose exposure is seen in the first filial generation of T. castaneum, where it was found to increase the susceptibility of the F1 generation. The lethal concentration (LC50) of parent stock (0.076 mg/ l) was reduced to 0.059 mg/ l and 0.052 mg/ l in the F1 generation, respectively in the sample prior exposed to sublethal doses of LC25 and LC40. Surviving females of sublethal exposures (LC40 and LC25) produced fewer offspring with a cumulative fecundity reduction of 21 and 84% respectively, compared to parent stock. The variables tested in PCA highlight the negative effect of sublethal dose on the fecundity and fitness of female adults.

Reduced Muscle Energetics And Fitness In Older Adults With Diabetes Independent Of Adiposity And Activity

Reduced Muscle Energetics And Fitness In Older Adults With Diabetes Independent Of Adiposity And Activity

Effect Of Shuffleboard Leisure Sports Program On Physical Fitness In Korean Older Adults

Effect Of Shuffleboard Leisure Sports Program On Physical Fitness In Korean Older Adults

Hippocampal functional connectivity mediates the association between cardiorespiratory fitness and cognitive function in healthy young adults.

Higher cardiorespiratory fitness (CRF) induces neuroprotective effects in the hippocampus, a key brain region for memory and learning. We investigated the association between CRF and functional connectivity (FC) of the hippocampus in healthy young adults. We also examined the association between hippocampal FC and neurocognitive function. Lastly, we tested whether hippocampal FC mediates the association between 2-Min Walk Test (2MWT) and neurocognitive function. 913 young adults (28.7 ± 3.7 years) from the Human Connectome Project were included in the analyses. The 2MWT performance result was used as a proxy for cardiovascular endurance. Fluid and crystalized composite neurocognitive scores were used to assess cognition. Resting-state functional MRI data were processed to measure hippocampal FC. Linear regression was used to examine the association between 2MWT, hippocampal FC, and neurocognitive outcomes after controlling for age, sex, years of education, body mass index, systolic blood pressure, and gait speed. Better 2MWT performance was associated with greater FC between the anterior hippocampus and right posterior cingulate and left middle temporal gyrus. No associations between 2MWT and posterior hippocampal FC, whole hippocampal FC, and caudate FC (control region) were observed. Greater anterior hippocampal FC was associated with better crystalized cognition scores. Lastly, greater FC between the anterior hippocampus and right posterior cingulate mediated the association between better 2MWT scores and higher crystalized cognition scores. Anterior hippocampal FC may be one underlying neurophysiological mechanism that promotes the association between 2MWT performance and crystalized composite cognitive function in healthy young adults.

As we were and as we Should Be, Combined Exercise Training in Adults with Schizophrenia: CORTEX-SP Study Part I.

Given the health benefits and the role of exercise as an anti-inflammatory adjuvant program, this study aimed to determine the effectiveness of a combined exercise program on cardiorespiratory fitness (CRF), body composition, and biochemical levels in adults with schizophrenia (SZ) characterized at baseline as metabolically unhealthy overweight with low CRF. Participants diagnosed with SZ (n = 112, 41.3 ± 10.4 yr, 28.7% women) were randomly assigned into a Treatment-As-Usual (TAU) control group (n = 53) or a supervised exercise group (n = 59, 3 days/week). Each combined exercise session consisted of both a low-volume high-intensity interval training (less than 10 min of high-intensity time per session) and a resistance circuit-training program. All variables were assessed pre-and post-intervention (20 weeks). For the assessment of CRF, a peak cardiopulmonary exercise test on a cycle ergometer was used. Following the intervention, participants from the exercise group (n = 51) showed increases in CRF (P < 0.001) through peak oxygen uptake (L·min-1; Δ = 17.6%; mL·kg.1·min-1, Δ = 19.6%) and the metabolic equivalent of task (Δ = 19%), with no significant changes (P > 0.05) in body composition and biochemical variables. However, the TAU group (n = 38) did not show any significant change in the study variables (P > 0.05). Between-group significant differences (P ≤ 0.05) were observed in CRF, first ventilatory threshold, and heart rate peak after the intervention period favoring the exercise group. This study demonstrated that a supervised combined exercise program in people with SZ helps to maintain body composition values and improve CRF levels. This could lead to an important clinical change in the characterization from metabolically unhealthy overweight to a metabolically healthy overweight population. Hence, exercise should be considered a co-adjuvant program in the treatment of the SZ population.

Time measurement validity and reliability of the 4 × 10-m shuttle run test in adult population: The ADULT-FIT project

ObjectivesThe purpose of this study was to analyze the time measurement validity and reliability (between raters and test–retest) of the 4 × 10-m shuttle run test to assess motor fitness in adults, according to gender, age, and physical activity levels. DesignCross-sectional. A total of 230 adults (86 women) aged 18–64 years participated in the study. MethodsThe time taken to complete the 4 × 10-m shuttle run test was recorded simultaneously by a trained and an untrained rater (inter-rater reliability) and by photoelectric cells (time measurement validity). 48–72 h later, the test was repeated under the same conditions (test–retest reliability). ResultsThe systematic error for trained rater vs. photocell was close to zero (0.0125, p < 0.01), with an effect size of 0.006; and for both, untrained rater vs. photocell and trained rater vs. untrained rater was ∼0.2 s (p < 0.001) with an effect size of 0.09. For the test–retest reliability, the systematic error was 0.05 s (p < 0.001), with an effect size of 0.26, the intraclass correlation coefficient was 0.998 and the coefficient of variation reported a variability of 0.73 %. Results were not influenced by gender and age, while these improved for active vs. non-active participants. ConclusionsFindings indicate that measurements with trained raters are a valid and reliable method for assessing the 4 × 10-m shuttle run test in adults. It is highly recommended that raters be trained to minimize the measurement error.

Effects of larval exposure to sublethal doses of ivermectin on adult fitness and susceptibility to ivermectin in Anopheles gambiae s.s.

BackgroundThe effects of ivermectin (endectocide) on mosquito survival make it a potential new malaria vector control tool. The drug can be administered to mosquito disease vectors through blood hosts that include humans and livestock. Its increased use may cause contamination of larval habitats, either directly through livestock excreta or indirectly through leaching or run-off from contaminated soil, albeit in sublethal doses. However, the effects of such exposure on immature stages and the subsequent adults that emerge are poorly understood. This study was undertaken to evaluate the impact of ivermectin exposure on Anopheles gambiae s.s. larvae and its effects on fitness and susceptibility to ivermectin in the emerging adults.MethodsLaboratory-reared An. gambiae s.s. (Kilifi strain) larvae were exposed to five different ivermectin concentrations; 0, 0.00001, 0.0001, 0.001, and 0.01 ppm, and larval survival was monitored to determine the appropriate sub-lethal dose. Concentrations with survival > 50% (0.00001 and 0.0001 ppm) were selected and used as the sub-lethal doses. The fecundity, fertility, and susceptibility to ivermectin of adults emerging after larval exposure to the sub-lethal doses were examined.ResultsOverall, exposure of An. gambiae s.s. aquatic stages to ivermectin caused a dose-dependent reduction in larval survival irrespective of the stage at which the larvae were exposed. Exposure to ivermectin in the larval stage did not have an effect on either the number of eggs laid or the hatch rate. However, exposure of first/second-instar larvae to 0.0001 ppm and third/fourth-instar larvae to 0.001 ppm of ivermectin reduced the time taken to oviposition. Additionally, exposure to ivermectin in the larval stage did not affect susceptibility of the emerging adults to the drug.ConclusionsThis study shows that contamination of larval habitats with ivermectin affects An. gambiae s.s. larval survival and could potentially have an impact on public health. However, there are no carry-over effects on the fecundity, fertility, and susceptibility of the emerging adults to ivermectin. In addition, this study shows that environmental exposure to ivermectin in the larval habitats is unlikely to compromise the efficacy of ivermectin in the emerging adults.Graphical

Effects of pervasive game on behavioral intention towards fitness among older adults in Henan: An empirical study

ABSTRACT Improving the fitness of older adults is a primary concern in countries with rapidly growing aging populations. This study examines older adults’ behavioral intention to engage in fitness activities using a bespoke pervasive game called Agoing. Based on the Unified Theory of Acceptance and Use of Technology 2 (UTAUT2) model, this study developed the UTAUT-LK model, ‘LK’ is an acronym for linear and knowledge. The UTAUT-LK model tested five independent variables in a single-group quasi-experiment. Data were collected from 378 participants using a 20-item questionnaire and subsequently analyzed through a structural equation model. The results indicate that effort expectancy (EE, p = .033), social influence (SI, p = .029), and hedonic motivation (HM, p < .001) significantly affect behavioral intention, with a high effect size (r = .827). In conclusion, well-designed pervasive games can enhance older adults’ EE, SI, and HM to engage in fitness activities. This study contributes to understanding the behavioral intention toward physical activity among older adults through the pervasive game.

Omega-3 index, cardiorespiratory fitness, and cognitive function in mid-age and older adults

Higher levels of omega-3 fatty acids in red blood cell membranes (omega-3 index or O3I) and cardiorespiratory fitness (CRF) are each associated with reduced cognitive impairment, but little research has examined the relationship between O3I and cognitive function while accounting for CRF. We analyzed cross-sectional data from 5,464 healthy men and women aged 55–85 years who had preventive medical examinations between 2009 and 2023. Primary exposures included O3I (<4.0%, 4.0–7.9%, or ≥ 8.0%) and age- and sex-based CRF quintile (1 = low, 2–3 = moderate, 4–5 = high). Cognitive impairment was defined as a Montreal Cognitive Assessment score of ≤ 25. We used Poisson regression to estimate relative risks (RR) of cognitive impairment, controlling for covariates. O3I < 4% was associated with increased cognitive impairment relative to ≥ 8.0% (RR, 1.21; 95% CI, 1.01–1.44) in a partially adjusted model. This association did not remain statistically significant in the fully adjusted model which included CRF. Low versus high CRF was associated with cognitive impairment (RR, 1.28; 95% CI, 1.07–1.53), independent of O3I and clinical biomarkers. The interaction between CRF and O3I was not significant (P = 0.8). In joint association analysis, risk of cognitive impairment was elevated with lower omega-3 index or CRF or both. Additional research is needed to fully understand the association between O3I and cognitive function at varying CRF levels.

Effects of the Trp64Arg Polymorphism in the ADRB3 Gene on Body Composition, Cardiorespiratory Fitness, and Physical Activity in Healthy Adults.

The ADRB3 gene plays a role in energy expenditure by participating in lipolysis, which affects body composition and performance. The ADRB3 rs4994 polymorphism has been studied in groups of athletes, overweight individuals, and obese and diabetic patients, but it has not been studied in young and healthy adults so far. In the present study, we examined the association of ADRB3 rs4994 polymorphism with body composition, somatotype, cardiorespiratory fitness and physical activity in young, healthy adults (N = 304). All subjects had anthropometric measurements, and somatotypes were assessed using the Heath-Carter method. In addition, cardiorespiratory fitness and physical activity levels were assessed. Genotyping for the ADRB3 gene was performed using a PCR-RFLP method. In the male group, body components were associated with the Trp64Trp genotype (waist circumference (p = 0.035), hip circumference (p = 0.029), BF (%) (p = 0.008), and BF (kg) (p = 0.010), BMI (p = 0.005), WHtR (p = 0.021), and BAI (p = 0.006)). In addition, we observed that the Trp64Trp genotype was associated with somatotype components (p = 0.013). In contrast, the Arg allele was associated with the ectomorphic components (0.006). We also observed a positive impact of the Trp64Trp genotype with maximal oxygen uptake (p= 0.023) and oxygen pulse (p = 0.024). We observed a negative relationship of the Trp64Trp genotype in the female group with reported moderate-intensity exercise (p = 0.036). In conclusion, we found an association of the Trp64 allele with anthropometric traits, somatotype and parameters describing physical performance in the male group. In the female subpopulation, we only found an effect of the polymorphism Trp64Arg on the level of physical activity for moderate-intensity exercise.