کتاب دانلود مقالاتمقالات لاتین
توده چربی با قدرت عضله و عملکرد تست جهش ارتباط منفی دارد

Fat Mass is Negatively Associated with Muscle Strength and Jump Test Performance
سال انتشار: a2020
زبان فایل: English
فرمت فایل: pdf
قیمت: 100,000ريال

افزودن به سبد دانلود

DOI: 10.14283/jfa.2020.11

Abstract

Background

It is known that maintenance of muscle mass cannot prevent loss of muscle strength in older adults. Recent evidence suggests that fat mass can weaken the relationship between muscle mass and functional performance. No information exists if fat mass can independently affect muscle strength and jump test performance in middle-aged and older adults.

Objective

To assess the independent relationships between fat mass, leg muscle mass, lower extremity muscle strength, and jump test performance in adults, 55–75 years of age.

Design

Cross-sectional.

Setting

University laboratory.

Participants

Fifty-nine older adults (men, n = 27, age = 64.8 + 6.5 years; women, n = 32, age = 62.5 + 5.1 years) participated in this study.

Measurements

Dual energy X-ray absorptiometry was used to measure fat mass and leg muscle mass. An average of 3 maximal countermovement jumps was used to calculate jump power and jump height. Two leg press and hip abduction strength were assessed by 1-repetition maximum testing.

Results

Stepwise sequential regression analysis of fat mass and leg muscle mass versus jump test performance and measures of muscle strength after adjusting for age, height, and physical activity revealed that fat mass was negatively associated with jump height (p = 0.047, rpartial = −0.410) in men. In women, fat mass was negatively associated with jump height (p = 0.003, rpartial = −0.538), leg press (p = 0.002, rpartial = −0.544), and hip abduction strength (p < 0.001, rpartial = −0.661). Leg muscle mass was positively associated with jump power in women (p = 0.047, rpartial = 0.372) only.

Conclusions

Fat mass has an independent negative relationship with jump test performance in middle-aged and older men and women. This has clinical implications for rehabilitating neuromuscular performance in middle-aged and older adults.