Aerobic Work Capacity Research Articles

Effect of double rocking jump rope training on lower limb muscle strength of badminton players.

Double rocking jump rope training can effectively enhance physical recovery, adaptability to exercise load, and lower limb muscle strength of badminton players in sports colleges, thus offering valuable insights for improving training methods in sports colleges and universities. To investigate the effect of double rocking jump rope training on the lower limb muscle strength of badminton players specializing in badminton in sports colleges. An experimental study was conducted through a ten-week teaching intervention experiment with badminton players. Relevant heart rate indexes and badminton related lower limb muscle strength indexes were measured before and after the experiment. The data of the measured relevant indexes were statistically and analytically analyzed. At the end of the experiment, the physical recovery level and the heart's adaptability to the exercise load of the control group were improved, and the lower limb muscle strength test indexes and sports performance were better than before the experiment. In the experimental group, badminton players' physical function, anaerobic metabolism of the body and other aspects also improved. The physical function of the experimental group of badminton players, the energy supply capacity of the body anaerobic metabolism and aerobic work capacity all have an enhancement effect, enabling badminton players to adapt to large exercise loads quickly and improve the recovery rate of physical fitness. The introduction of double rocking jump rope into badminton training classes in sports colleges and universities as a means of lower limb muscle strength training is conducive to improving the level of lower limb muscle strength of special badminton players, enriching the teaching and training means of lower limb muscle strength in sports colleges and universities, and broadening the research field of lower limb muscle strength in badminton in sports colleges and universities.

Model characteristics of the structure and interrelations of integral parameters of students' physical condition

Background and Study Aim. Understanding the physical condition parameters of students during physical education classes is essential in the context of modern education. This understanding contributes to the development of effective teaching strategies tailored to the specific needs of this demographic. The aim of the study is to investigate the structure and interrelations of physical condition (PC) parameters of students aged 17-19 years in the process of physical education classes. Material and Methods. The study involved 153 students aged 17-19 years old, and their physical development, functional, and physical fitness indices were recorded. The study analyzed intra- and intergroup correlations among 55 physical condition (PC) indices. It examined the correlations among integral components of students' structure, including somatic health (SH), adaptation potential (AP), aerobic physical work capacity (APWC), and biological age (BA). The study utilized factor analysis, correlation analysis, dispersion analysis, and regression analysis to examine the relationships and patterns within the collected data. Results. The analysis of intra- and intergroup relationships among the studied parameters revealed that the structure of physical condition (PC) is consistent between girls and boys. There are close linear dependencies, similarities, and differences in the interrelations of integral PC parameters, including somatic health (SH), adaptation potential (AP), aerobic physical work capacity (APWC), and biological age (BA), between boys and girls. The regression model coefficients indicate that for both genders, SH is influenced by APWC and AP. In girls, AP is dependent on SH and BA, while in boys, AP depends on SH, BA, and APWC. A strong relationship between APWC and resting heart rate (HR) was identified during testing, with boys demonstrating higher levels of APWC at lower initial HR values compared to girls. Conclusions. The study has provided valuable insights into the key components of the physical condition (PC) structure among 1st-year students. These components encompass physical development, adaptation potential, health, cardiorespiratory system functional capacities, speed-strength fitness, biological age, and degree of aging. Findings emphasize the significance of resting bradycardia as an informative marker and criterion for assessing APWC during moderate-intensity muscle activity. The developed mathematical models have proven effective in modeling and predicting students' PC, including the individual integral components (SH, AP, APWC, and BA). These models provide valuable tools for anticipating potential changes in these parameters.

FACTORS THAT ENSURE AN ADEQUATE LEVEL OF PHYSICAL FITNESS IN FEMALE STUDENTS OF HIGHER EDUCATION INSTITUTIONS

The article discusses the factors that ensure the appropriate level. It was determined that physical capacity is the maximum mechanical work that a person is able to perform. Assessment of a person's physical capacity is necessary for solving a wide range of practical problems: determining the state of health, the results of sports training, and others.
 It has been proven that physical performance depends on many factors: body composition and anthropometric indicators, muscle strength and endurance, the state of the musculoskeletal system, functional and endocrine systems. Factors such as energy potential, completeness of its use and cost-effectiveness of movements are also important. It has been established that work capacity is ensured by both aerobic and anaerobic processes of energy generation, and according to the preference of one of them, aerobic physical work capacity, anaerobic and mixed are distinguished.
 Despite the fact that the indicators of physical development of student youth show positive dynamics, the general state of health of modern youth is deteriorating, which negatively affects their physical and mental capacity. The most acute social problem in Ukraine is the deterioration of the health of children and youth. Negative factors that reduce the level of health are improper nutrition, hypokinesia, psycho-emotional overstrain, and bad habits.
 Effective means of improving not only physical, but also emotional health of a person include aqua fitness. Nowadays, there is no doubt about the possibility of a positive effect of physical exercises in water on the state of physical and mental health, improving the activity of the cardiovascular, respiratory, and hormonal systems and developing the physical qualities of a person.

The Effect Of Eight-week Sprint Interval Training On Aerobic Ability Of Elite Female Badminton Players

Because of the fast ball speed, high swing frequency and short intervals, the badminton event requires athletes to complete fast running, sudden start or stop, change of direction and continuous high-intensity multiple shots on the field. There are high requirements for athletes' aerobic capacity. PURPOSE: The purpose of this study is to explore the effect of 8-week Sprint Interval Training (SIT) on enhancing the aerobic exercise ability of female badminton athletes from the perspective of oxygen transport and utilization. METHODS: Sixteen elite female badminton players were selected and random divided into experimental group (SIT group) and control group (CON group). The SIT group underwent three sprint interval trainings per week, including two power bike trainings and one multi-ball training. The CON group performed two Fartlek runs and one regular shuttlecock-feeding training per week for a total of eight weeks. Before and after intervention, the two groups of athletes were tested for aerobic capacity via YO-YO IR2, maximal oxygen uptake, lactate clearance rate, and the arterial occlusion muscle oxygen content test performed by Near Infrared Spectroscopy (NIRS) instrument. Subsequently, players' muscle oxygen consumption and other related parameters were compared between two groups using repeated-measures ANOVA, considering pre-post effect. RESULTS: The running distance of YO-YO IR2 of SIT group increased from 725 ± 132.9 m to 840 ± 126.5 m (p < 0.05). The VT-VO2 of SIT group increased from 1940.1 ± 112.8 ml/min to 2176.9 ± 78.6 ml/min (p < 0.05), VT/VO2max increased from 75 ± 4% to 82 ± 4% (p < 0.05), and the lactate clearance rate was raised from 21 ± 5% to 27 ± 4% (p < 0.05). The ΔO2Hb of SIT group decreased from 4.8 ± 0.5 μm to 4.4 ± 0.5 μm (p < 0.05), the oxygen consumption of muscle decreased from 0.62 ± 0.06 mlO2/min/100 g to 0.57 ± 0.06 mlO2/min/100 g (p < 0.05), and the full recovery time of O2Hb declined from 9.99 ± 1.9 s to 9.44 ± 1.5 s (p < 0.05), O2Hb over-recovery increased from 4.79 ± 0.5 μm to 5.19 ± 0.6 μm (p < 0.05). CONCLUSIONS: SIT can improve maximum aerobic working capacity, aerobic recovery ability and oxygen utilization efficiency by improving the oxygen uptake and utilization ability of badminton players’ skeletal muscles, thus boosting the their rapid repeated sprinting ability.

Dietary Iron and the Elite Dancer.

Dancers are an athlete population at high risk of developing iron deficiency (ID). The aesthetic nature of the discipline means dancers potentially utilise dietary restriction to meet physique goals. In combination with high training demands, this means dancers are susceptible to problems related to low energy availability (LEA), which impacts nutrient intake. In the presence of LEA, ID is common because of a reduced mineral content within the low energy diet. Left untreated, ID becomes an issue that results in fatigue, reduced aerobic work capacity, and ultimately, iron deficient anaemia (IDA). Such progression can be detrimental to a dancer’s capacity given the physically demanding nature of training, rehearsal, and performances. Previous literature has focused on the manifestation and treatment of ID primarily in the context of endurance athletes; however, a dance-specific context addressing the interplay between dance training and performance, LEA and ID is essential for practitioners working in this space. By consolidating findings from identified studies of dancers and other relevant athlete groups, this review explores causal factors of ID and potential treatment strategies for dancers to optimise absorption from an oral iron supplementation regime to adequately support health and performance.

Cardiopulmonary Exercise Performance in the Pediatric and Young Adult Population Before and During the COVID-19 Pandemic.

Physical activity (PA) decreased and sedentary behavior (SB) increased in the pediatric population during the Coronavirus Disease 2019 (COVID-19) pandemic. We examined the effects of PA and SB on cardiopulmonary exercise performance in children, adolescents and young adults both with and without underling cardiac disease, and hypothesized that there will be a change in aerobic and physical working capacity during the pandemic. This was a single-center retrospective longitudinal cohort study in patients age 6–22 years who underwent serial maximal cardiopulmonary exercise stress testing before and during the COVID-19 pandemic. Metabolic variables were obtained; PA and SB data were extracted from clinic notes. A total of 122 patients (60% male) underwent serial exercise testing with a median age of 14 years at the first CPET. Predicted peak aerobic capacity significantly decreased among both females and males during the pandemic, even after adjusting for changes in somatic growth. There was no significant change in physical working capacity during the pandemic. Patients who were more aerobically fit experienced a greater decrease in aerobic capacity during the pandemic compared to those less fit. In conclusion, cardiopulmonary exercise performance, notably aerobic activity, decreased during the COVID-19 pandemic in children, adolescents and young adults compared to pre-pandemic values. This decline was most notable in those with the highest pre-pandemic aerobic capacity values and was independent of somatic growth or changes in BMI. This study has public health implications and demonstrates the importance of PA on overall cardiovascular health.

Physiological and Anthropometric Differences Among Endurance, Strength, and High-Intensity Functional Training Participants: A Cross-Sectional Study

ABSTRACT Purpose: We compared aerobic capacity (), mitochondrial capacity (), anaerobic power, strength, and muscle endurance in healthy, active men from strength (STR), endurance (END) and high-intensity functional training (HIFT) backgrounds.Methods:Twenty-four men (n = 8/group) completed a cycle ergometer test to determine , followed by a 3-min all-out test to determine peak (PP) and end power (EP), and to estimate anaerobic [work done above EP (WEP)] and aerobic work capacity. Strength was determined by knee extensor maximal voluntary contraction at various flexion angles. The endurance index (EI) of the vastus lateralis (VL) was assessed by measuring muscle contraction acceleration during electrical twitch mechanomyography. of the VL was assessed using near-infrared spectroscopy to estimate muscle oxygen consumption during transient femoral artery occlusions. Results: was significantly different among groups (p < .05). PP was significantly higher in HIFT and STR versus END (p < .05). EP was significantly higher in HIFT and END compared to STR (p < .05). WEP was significantly higher in STR compared to END (p < .05), whereas total work done was significantly higher in HIFT and END compared to STR (p < .05). and EI were comparable between HIFT and END but significantly lower in STR versus END (p < .05). Torque production was significantly lower in END compared to STR and HIFT at all flexion angles (p < .05), with no difference between STR and HIFT.Conclusion:HIFT participants can exert similar power outputs and absolute strength compared to strength focused participants but exhibit fatigue resistance and mitochondrial capacity comparable to those who train for endurance.

Perceived green space quality, child biomarkers and health-related outcomes: A longitudinal study

Accumulating exposure to quality green space over time is posited to influence child health, yet longitudinal studies are scarce. This study aimed to examine the associations between trajectories of perceived green space quality and child health-related outcomes. We used data from 1874 childrenin the B-cohort of the Longitudinal Study of Australian Children who participated in the Child Health Checkpoint module at 11–12 years. Data on caregiver perceived green space quality measured biennially was assessed using discrete trajectory mixture models to group children by contrasting distributions in green space quality over time. Examination of associations between trajectory groups of perceived green space quality and child biomarkers (i.e., albumin-to-creatinine ratio, total, cholesterol, total triglycerides, and glucose), physical health and behavioural assessments (i.e., anthropometric measurements, blood pressure, sedentary behaviour, physical activity, sleep, aerobic work capacity, and general wellbeing), and health care use were assessed using multilevel models, adjusted for sociodemographic variables. Four perceived green space quality trajectories were identified: “decreasing quality from high to moderate”; “increasing quality from low to high”; “consistently high quality”; “consistently low quality”. Compared with consistently low levels of quality green space, adjusted models indicated consistently high-quality green space was associated with lower total triglycerides (β −0.13; 95%CI -0.25, −0.01). Lower odds of hospital admission was observed among children who accumulated quality green space over time (OR 0.45; 95%CI 0.23, 0.87). These associations were observed in boys only in sex-stratified analyses. Moreover, boys accumulating quality green space through time tended to have lower diastolic blood pressure (β −2.76; 95%CI -5.17, −0.35) and girls who experienced loss in quality green space tended to have a higher percentage of body fat (β 2.81; 95%CI 0.43, 5.20). Accumulating quality green space over time is important for various aspects of child health, with contrasting benefits by sex.

MEDICAL EFFECT OF SPORTS ON IMPROVING THE MAXIMUM OXYGEN

ABSTRACT Introduction: Maximum oxygen uptake is an effective indicator of the level of human cardiopulmonary function and aerobic work capacity. Observing the effects of aerobic training and formulating scientific training plans are of considerable value. Objective: To observe the effect of physical exercise on the human body's maximum oxygen uptake and arterial blood ketone body ratio. Methods: Before and after 4 weeks of physical exercise, the maximum oxygen uptake, blood lactic acid and heart rate changes, and ketone body content in the incremental load exercise experiment was measured in the human body. Results: The subjects’ maximum oxygen uptake, maximum exercise load, heart rate, and blood lactic acid levels increased significantly after physical exercise. Conclusion: The human body's maximum oxygen uptake is enhanced under sports. Level of evidence II; Therapeutic studies - investigation of treatment results.

EFFECT OF PHYSICAL EXERCISE ON INCREASING THE MAXIMUM OXYGEN UPTAKE OF SKELETAL MUSCLE

ABSTRACT Introduction: Aerobic exercise can improve the physical function of athletes and increase the oxygen content in skeletal muscles. This has a significant reference value for evaluating training effects and judging sports fatigue. Objective: Maximum oxygen uptake is one of the most critical indicators of aerobic work capacity. The thesis analyzes the medical promotion effect of physical exercise on the oxygen content of skeletal muscle. Methods: The thesis performed aerobic exercises on two groups of young rowers. Athletes in group A performed high-load exercise, and athletes in group B performed low-load exercise. At the same time, we placed a detector on the athletes’ skeletal muscle to test the volunteer's muscle oxygen content and other physiological indicators. Results: Comparing high-load exercise and low-load exercise, the maximum oxygen uptake and the utilization rate of the maximum oxygen uptake when reaching the anaerobic net were 10% and 16% higher, respectively. There was no difference in the activity of muscle enzymes between the two groups. Conclusions: After aerobic training, the muscle's oxygen utilization capacity is strengthened. Physical exercise promotes the maximum oxygen uptake of skeletal muscles. Level of evidence II; Therapeutic studies - investigation of treatment results.

Effects of Eight Interval Training Sessions in Hypoxia on Anaerobic, Aerobic, and High Intensity Work Capacity in Endurance Cyclists.

Aim: This study aimed to determine if eight sessions of supramaximal but steady-state, set duration interval training in hypoxia enhanced measured anaerobic capacity and work performed during high intensity exercise. High Alt Med Biol. 21:370-377, 2020. Materials and Methods: Eighteen cyclists (V̇O2peak: 57 ± 7 ml·kg-1·min-1) were pair-matched for anaerobic capacity determined by maximal accumulated oxygen deficit (MAOD) and allocated to a 4-week interval training in hypoxia (IHT; FiO2 = 14.7% ± 0.5%, n = 9) or interval training in normoxia (NORM; FiO2 = 20.6% ± 0.3%, n = 9). Cyclists completed twice weekly interval training (8 × 1 minutes: ∼120% V̇O2peak, 5 minutes recovery: ∼50% V̇O2peak) in addition to their habitual training. Before and after the intervention, a constant work rate supramaximal time to fatigue and a graded exercise test were used to determine changes in anaerobic capacity/supramaximal work performed and aerobic capacity/peak aerobic power output, respectively. Results: No interaction or main effects were observed. Using indirect calorimetry, anaerobic capacity was not significantly different in either group pre- to postintervention using MAOD (IHT: 4% ± 15%; NORM: -5% ± 12%) or gross efficiency methods (IHT: 7% ± 14%; NORM: -2% ± 9%), and VO2peak was unchanged (IHT: 1% ± 6%; NORM: 1% ± 4%). However, within-group analysis shows that supramaximal work performed improved with IHT (14% ± 13%; p = 0.02; d = 0.42) but not NORM (1% ± 22%), and peak aerobic power output increased with IHT (5% ± 7%; p = 0.04; d = 0.32) but not NORM (2% ± 4%). Conclusion: Steady-state, set duration supramaximal interval training in hypoxia appears to provide a small beneficial effect on work capacity during supramaximal and high intensity exercise.

Estimation of the aerobic capacity by step test in the workers of a tile factory in Yazd in 2017

Introduction: Estimation of the maximum aerobic capacity to find a physiological fitness between worker and the work is of great importance. The purpose of this study was to estimate the highest aerobic capacity and physical work capacity of tile and ceramic workers. Materials and methods: In this cross-sectional study, 90 workers were randomly selected from tile and ceramic workers in Yazd. A questionnaire consisting of two parts was used as data collection tool. The first part of the questionnaire included demographic characteristics completed by the interview. In the second part, parameters including height, weight, BMI and heart rate were inserted in the questionnaire. The Queen step test was used to measure the maximum aerobic capacity. The data were analyzed by SPSS software using Mann-Whitney and Kruskal-Wallis tests and Spearman,s test. Results: The maximum aerobic capacity in tile and ceramic workers was estimated to be 3.60±.0.03 L/m. The results showed that aerobic capacity was significantly correlated with weight and body mass index. Also, there was no significant relationship between aerobic capacity, smoking and exercise, and education, but there was a significant relationship between gob title and aerobic capacity. Conclusion: Weight, BMI and type of occupation affect the aerobic capacity of workers.

The effect of high-intensity interval training and moderate-intensity continuous training on aerobic fitness and body composition in males with overweight or obesity: A randomized trial

The optimal exercise training characteristics for improving body composition in individuals with obesity are not clear. This study assessed the effects of 6-weeks of high-intensity interval training (HIIT) or moderate-intensity continuous training (MICT) on aerobic fitness and body composition in males with overweight or obesity. Twenty-eight participants (18–45 years; BMI: 25–35 kg/m2) performed stationary cycling 3 times per week for 6 weeks. Participants were randomly allocated to work-matched HIIT (N = 16) (10 × 1-min intervals at ~90% peak heart rate) or MICT (N = 12) (30 min at 65–75% peak heart rate). Maximal aerobic capacity (VO2peak) and body composition were assessed before and after 6-week training. Both HIIT and MICT induced moderate increases in aerobic fitness (Δ% VO2peak: HIIT 9 ± 8%, ES = 0.42; MICT: 7 ± 13%, ES = 0.32) and work capacity (Δ% peak workload: HIIT 13 ± 10%, ES = 0.69: MICT 17 ± 15%, ES = 0.76), but these changes did not differ significantly between the groups (all p > 0.16). The effects of HIIT or MICT on body composition outcomes were negligible to small across whole-body and all regional-specific sites (all effect sizes ES = −0.19 to 0.38) and did not differ significantly between the groups (all p > 0.21). Short-term (6-weeks) cycling training did not improve body composition in males with overweight or obesity. Improvements in aerobic fitness were comparable between work-matched HIIT and MICT.

The health benefits of exercise therapy for patients with Down syndrome: A systematic review.

BackgroundMany patients with Down syndrome (PWDS) have poor cardiometabolic risk profiles, aerobic capacities and weak hypotonic muscles, primarily because of physical inactivity and poor diet.ObjectivesThis study discusses the benefits of exercise therapy on body composition, aerobic capacity, muscle strength, proprioception and cardiometabolic profiles of PWDS.MethodsA literature review using the Crossref metadatabase, following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), focusing on the period 2007-2018, was undertaken. Each record was judged adopting the modified Downs and Black Appraisal Scale. The literature investigation identified 15 701 records. Records were excluded if they were published before 2007, pertained to the impact of exercise on intellectual disabilities beyond Down syndrome or the impact of medical, pharmaceutical, nutrition and psychological interventions among PWDS and were published in languages besides English. Nineteen articles were synthesised into this commentary.ResultsPWDS have a heightened cardiometabolic risk profile and high oxidative stress associated with elevated insulin resistance, poor insulin sensitivity, atherosclerosis and hypertension. PWDS have low aerobic capacity (VO2max), peak heart rates, muscle strength, agility and balance. Regular physical activity is beneficial to improve their VO2max and muscle strength. Moreover, regular physical activity reduces lipid peroxidation and arterial cell wall damage, the pathogenesis of atheroma is limited.ConclusionExercise therapy compliance seems to have a positive impact on the cardiometabolic risk profile, muscle strength and aerobic work capacity of PWDS. Nonetheless, additional vigorous experimental investigations are necessary to better understand the effect of exercise therapy on the aerobic, strength, proprioception and cardiometabolic risk profile of PWDS.

THE CHANGES IN AEROBIC WORK CAPACITY OF THE STUDY PROGRAM "HEALTH CARE SPECIALIST" DURING THE ELEVEN YEARS PERIOD

Aerobic work capacity is one of the main indicators of physical fitness and health. Aerobic work capacity depends on many factors, both physical activity level and age and gender and other factors. Aerobic work capacity falls down under the influence of sedentary lifestyle, but it can also decrease as a result of over-intensity loads. Applicants for the study program are young people who have recently graduated from the high school and people of different ages with different sporting experiences. The purpose of the research: to explore applicants aerobic work capacity of Rīga Stradiņš University study program "Health Care Specialist” and their relation to various factors and changes in the dynamics of 11 years. A total of 731 participants (268 males and 473 women) conducted the World Health Organization Bicycle ergometer test. The average level of aerobic work capacity for health care specialist applicants will increase from 2007 to 2013, but declines relatively fast between 2014 and 2017. Over the last 6 years, aerobic work capacity has fallen sharply for men as women. Body mass index does not change significantly over 11 years. The correlation between body mass index and aerobic capacity is weak. Over the last 3 years aerobic work capacity downturn trend has been particularly pronounced for women aged 20- 29.

Distinct Effects of Repeated-Sprint Training in Normobaric Hypoxia and β-Alanine Supplementation

Objective: The present study evaluated the effects of repeated-sprint training in normobaric hypoxia and β-alanine supplementation (BA) on aerobic and anaerobic performance in recreationally active men.Methods: Participants were randomly assigned to one of the following groups: normoxia/β-alanine (NB, n = 11), normoxia/placebo (NP, n = 8), normobaric hypoxia/β-alanine (HB, n = 10) and normobaric hypoxia/placebo (HP, n = 9). All participants completed 8 training sessions over 4 weeks on a cycle ergometer either in normobaric hypoxia (oxygen fraction: FiO2 = 14.2%) or normoxia (FiO2 = 20.9%). Participants were instructed to consume a daily dosage of 6.4 g of BA or placebo. Changes in performance in a graded exercise test, repeated-sprint test (RST), and 3-minute all-out test (3MT) were examined before and after training and supplementation.Results: No between-group differences were observed for training volume or supplementation compliance. Anthropometric and hematological measures remained unchanged before and after intervention in all groups. A main effect of training condition was shown for oxygen consumption and power output at respiratory compensation point, average power output during the last sprint of the RST, heart rate recovery following the RST, and total work during the 3MT. These measures in the normobaric hypoxia groups were significantly (p < 0.05) higher than the normoxia groups, except for the heart rate recovery following the RST. A main effect of supplement was detected in anaerobic working capacity, with postintervention values in the BA groups being significantly (p < 0.05) higher than the placebo groups.Conclusions: Repeated-sprint training in hypoxia improved aerobic performance, exercise tolerance, cardiovascular recovery, and overall working capacity, while BA maintained the anaerobic working capacity. However, BA did not provide additional benefits with respect to attenuating fatigue or enhancing repeated-sprint performance.

Aerobic Variables for Prediction of Alpine Skiing Performance – A Novel Approach

The aim of this study was to investigate the predictive power of aerobic test results and anthropometric variables on FIS-ranking of junior elite alpine skiers. Results from twenty-three male and female adolescent elite alpine skiers from two seasons were included in the multivariate statistical models. Physical work capacity was determined by V̇O2peak, blood lactate concentration ([HLa]b), and heart rate (HR) during ergometer cycling. Anthropometric variables were body stature, body weight and calculated BMI. No significant correlation between competitive performance and aerobic work capacity or anthropometric data was observed neither in male nor female adolescent skiers. Pre-season physical tests and anthropometric data could therefore not predict end-season FIS-ranking. The best regression (R2) and prediction (Q2) models of FIS slalom (SL) and giant slalom (GS) rank reached R2=0.51 to 0.86, Q2=−0.73 to 0.18, indicating no valid models. This study could not establish V̇O2peak and other included variables as predictors of competitive performance. When combining results from commonly used tests for alpine skiers, and applying multivariate statistical models, investigated tests seems of limited used for athletes, coaches, and ski federations. Performance-specific pre-season tests must be developed and validated for prediction of performance and guidance of exercise training.

Albendazole Treatment Improves Work Capacity in Women Smallholder Farmers Infected with Hookworm: A Double-Blind Randomized Control Trial.

An estimated 4.7 billion people live in regions exposed to soil-transmitted helminths, intestinal parasites that have significant impacts on the health of women smallholder farmers. The goal of this trial was to determine whether treatment with albendazole impacts the work capacity of these farmers. This is a prospective double-blind, randomized effectiveness trial. Participants (N = 250) were randomly selected from safe motherhood groups in the Democratic Republic of Congo. Prevalence/intensity of hookworm infection, hemoglobin, and demographics was obtained. At study (Time = 0), participants were randomized into treatment (albendazole 400 mg) and placebo (similar placebo tablet) groups. A step test was administered as a proxy metric for work capacity. Work capacity was defined as ∆heart rate before and after 3 minutes of step testing, in beats per minute. At study (time = 7 months), the step test was repeated and work capacity remeasured. The ∆work capacity (time = 0 minus time = 7 months) was the primary outcome. Investigators/field assistants were blinded to who was enrolled in groups, hookworm status, and step test results. Regression showed highly significant interactive effects of hookworm status and treatment group relative to ∆work capacity after controlling for resting pulse rate and age (P < 0.002). Estimated marginal means for work capacity (WC) for each of four groups (hookworm positive plus placebo, hookworm positive plus treatment, hookworm negative plus placebo, and hookworm negative plus treatment) showed women who were hookworm positive and received treatment decreased heart rate by 9.744 (95% confidence interval [CI]: 6.42, 13.07) beats per minute (increased WC), whereas women who were hookworm positive and received placebo saw a nonsignificant decrease of 0.034 (95% CI: -3.16, 3.84) beats per minute. Treatment with albendazole was associated with improved aerobic work capacity posttreatment. Given modest costs of drug distributions, risk benefits of periodic deworming warrants further study in larger controlled trials.

PP.25.02] EFFECT OF TRAINING OPTIMIZATION ON MAXIMAL FUNCTIONAL PARAMETERS IN SPORT-DANCERS

Objective: Improvement of the aerobic capacity is the main goal of sports preparation and cardio-vascular rehabilitation.Cardio-plulmonary stress test is a useful tool for creation of individualized training programs. Design and method: In the present study we investigated the effect of training optimization aimed at improvement of aerobic functional abilities in male amateur sport-dancers. Two maximal cardio-respiratory tests were carried out on a treadmill (at the beginning and the end of an experimental 2-month period) and the dynamic in the maximal aerobic and total ergometric work capacity of the athletes was evaluated. During the 2-month period additional aerobic training sessions were included in the athletes’ program with intensity based on the individual anaerobic threshold (AnT) determined during the first test. These workloads consisted of 60-minute jogging sessions at intensity corresponding to 65 ÷ 80% of AnT (116 ÷ 145 beats min−1) twice weekly and trekking in spare time (3–4 times during the 2-month period). Results: The follow-up functional test revealed significant increase of the measured absolute and relative values of maximal oxygen uptake (8.5%, 9.2%, respectively; p* < 0.05), of achieved maximal treadmill speed (12.2%; p* < 0.05) and decrease in maximal pulmonary ventilation (−15.9%; p* < 0.05). These changes in the analyzed main functional parameters were accompanied by statistically significant decrease in maximal lactate concentration (−17.3%; p* < 0.05) and slight decrease of the registered maximal heart rate (−3 beats min−1; p > 0.05). Conclusions: The results allowed us to conclude that the training sessions added to the athletes’ program had contributed to the established substantial positive effect on the aerobic abilities. The results confirm the view that the application of individually tailored workloads in aerobic training programs is an important factor for optimization of metabolic energy pathways and a prerequisite for marked improvement of the organism functional work capacity.

Aerobic fitness in adolescents with chronic pain or chronic fatigue: parallels and mechanisms?

Chronic fatigue and chronic pain both deter people from participating in exercise, even though exercise is often a key component of treatment. While reasons for this may seem obvious, the extent and mechanism(s) of reduced exercise performance among affected individuals, particularly those with chronic pain, are not well described. We hypothesized that patients with chronic fatigue are more deconditioned than those with chronic pain, due to the nature of their illness or disability. Retrospective chart audit June 2012 to December 2014. Adolescents with chronic fatigue (320, 73 males) or chronic pain (158, 30 males). Maximal cardiopulmonary exercise test to determine peak oxygen uptake (V̇O2) and work efficiency. Mean (standard deviation (SD)) peakV̇O2 was similar between patients with chronic fatigue and chronic pain: males 36.5 (SD 8.3) vs 34.2 (SD 7.3) ml/kg/min (p = 0.17); females 27.3 (SD 6.1) vs 27.6 (SD 6.6) ml/kg/min (p = 0.67). PeakV̇O2 was < 90% predicted in 80% and 75% of females, or 77% and 83% of males, with chronic fatigue and chronic pain, respectively. Peak O2pulse and work efficiency were likewise similar. Patients in both groups manifest exercise responses typical of cardiopulmonary deconditioning and to similar extent. Failure to detect unique cardiopulmonary or muscle pathophysiology suggests a shared pathway to low aerobic work capacity.