A cross-sectional study on body composition and energy expenditure in women athletes during aging
| Autor: | Barbara J. Nicklas, Alice S. Ryan, D. Elahi |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Adult
Aging medicine.medical_specialty Physiology Endocrinology Diabetes and Metabolism Adipose tissue Physical exercise Body Mass Index Reference Values Physiology (medical) Internal medicine Humans Medicine Aged biology business.industry Athletes Age Factors VO2 max Middle Aged biology.organism_classification medicine.disease Cross-Sectional Studies Endocrinology Adipose Tissue Basal metabolic rate Body Composition Lean body mass Regression Analysis Female Metabolic syndrome Energy Metabolism business Body mass index Sports |
| Zdroj: | American Journal of Physiology-Endocrinology and Metabolism. 271:E916-E921 |
| ISSN: | 1522-1555 0193-1849 |
| DOI: | 10.1152/ajpendo.1996.271.5.e916 |
| Popis: | The relationships between total and regional body composition, intra-abdominal adipose tissue (IAAT), resting metabolic rate (RMR), and substrate oxidation were examined in 43 highly trained women athletes and 14 sedentary women aged 18-69 yr. Athletes were divided into four groups (18-29, 30-39, 40-49, and 50-69 yr) and controls into two groups (18-29 and 40-50 yr). Maximal oxygen consumption declined with age (r = -0.52, P < 0.0005) in the athletes and was higher in all groups of athletes than in controls (P < 0.0001). No differences in percent fat and fat-free mass (FFM) were found between the youngest and oldest athletes. Although body mass index was < 25 kg/m2 in all subjects, percent body fat and total fat mass were higher in controls than in athletes for both young and older women (all P < 0.05). FFM was higher in young athletes than in young controls (P < 0.0001). Despite similar percent fat among athletes, IAAT increased with age (r = 0.75, P < 0.0001), but subcutaneous abdominal fat and sagittal diameter did not. IAAT and subcutaneous abdominal fat were also higher in young controls than in young athletes and in older controls than in older athletes (all P < 0.005). Age and FFM were independent predictors of the decline in RMR in the athletes. Fat oxidation (g/day) was highest in the youngest athletes and declined with age (r = -0.47, P < 0.005). We conclude that intense chronic exercise in women athletes prevented the decline in FFM with age. Endurance-trained women have low IAAT stores, which may potentially reduce subsequent risk associated with the metabolic syndrome. |
| Databáze: | OpenAIRE |
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