کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8262236 | 1534834 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reduced body weight or increased muscle quality: Which is more important for improving physical function following exercise and weight loss in overweight and obese older women?
ترجمه فارسی عنوان
کاهش وزن بدن یا افزایش کیفیت عضله: کدام مهم تر است برای بهبود عملکرد فیزیکی پس از تمرین و کاهش وزن در اضافه وزن و چاقی زنان مسن تر؟
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کلمات کلیدی
سالخورده، ورزش، رژیم غذایی، چاقی، سلامتی،
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
سالمندی
چکیده انگلیسی
The purpose of this study was to examine the relative contributions of changes in muscle quality and body composition to changes in lower-extremity physical function (LEPF) following a 6-month exercise and weight loss intervention in overweight and obese older women. Thirty-eight overweight and obese (BMIâ¯=â¯30.0â¯Â±â¯4.4â¯kg/m2) older (ageâ¯=â¯69.3â¯Â±â¯4.1â¯y) women completed 6â¯months of multicomponent exercise (cardiorespiratory, resistance, balance and flexibility training) and weight loss (hypocaloric diet that reduced energy intake by ~500â¯kcal/d). Body composition was measured via dual-energy X-ray absorptiometry and muscle quality (N-m/kg) was defined as maximal concentric isokinetic knee torque divided by upper-leg lean mass. The standardized scores of four objective measures of physical function were summed to yield a composite LEPF Z-score. At 6â¯months, there were significant reductions in body weight (â9.6â¯Â±â¯3.5%, pâ¯<â¯0.01), absolute fat mass (â6.8â¯Â±â¯2.4â¯kg, pâ¯<â¯0.01) and relative adiposity (â4.9â¯Â±â¯2.1%, pâ¯<â¯0.01). There were also improvements in both muscle quality (+1.6â¯Â±â¯1.8â¯N-m/kg, pâ¯<â¯0.01) and individual measures of LEPF (11-57%, pâ¯<â¯0.01). Multivariate linear regression indicated that increased muscle quality was the strongest independent predictor of an improvement in LEPF Z-score (standardized βâ¯=â¯0.64, pâ¯<â¯0.01) and explained 34% of the variance. A reduction in body weight also predicted an improvement in LEPF, independent of the change in muscle quality. In conclusion, muscle quality can be increased in the presence of clinically meaningful weight loss, and is the primary determinant of improved physical function in overweight/obese older women.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Experimental Gerontology - Volume 108, 15 July 2018, Pages 159-165
Journal: Experimental Gerontology - Volume 108, 15 July 2018, Pages 159-165
نویسندگان
Chad R. Straight, Alison C. Berg, Rachelle A. Reed, Mary Ann Johnson, Ellen M. Evans,