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首页> 外文期刊>Medicine and science in sports and exercise >Muscle metabolic function, exercise performance, and weight gain.
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Muscle metabolic function, exercise performance, and weight gain.

机译：肌肉代谢功能，运动表现和体重增加。

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PURPOSE: The study purpose was to determine the relationship: 1) of muscle metabolism to exercise performance and 2) of exercise performance to rate of weight gain. METHODS: Eighty-three black and white premenopausal women were evaluated for maximum oxygen uptake (VO2max ), isometric quadriceps and triceps surae strength, and 31P magnetic resonance spectroscopy of calf muscle metabolic capacity. Rate of weight gain was determined 1 yr later. Multiple regression was used to model dependent variables. RESULTS: Muscle aerobic capacity and strength of the quadriceps muscle independently contributed to endurance time on the treadmill (ET) in one model (overall R = 0.47, P < 0.01), and VO2max and strength of the quadriceps muscle independently contributed to ET in another model (R = 0.85, P < 0.001). In models of muscle strength, maximum creatine kinase activity and maximum anaerobic glycolytic rate independently contributed to triceps surae strength, after adjusting for triceps surae cross-section area (R =0.63, P < 0.001). In another model, maximum creatine kinase activity was related to quadriceps strength independent of leg lean tissue (R = 0.31, P < 0.05). Rate of weight gain was related to muscle metabolic economy (r = -0.25, = 0.04), quadriceps strength (r = -0.34, P < 0.01), VO2max (r = -0.22, = 0.04), and ET (r = -0.21, = 0.04). Rate of weight gain was modeled by muscle metabolic economy, VO2max, and quadriceps strength (R = 0.48, P < 0.01). CONCLUSIONS: Implications of findings are 1) greater strength and aerobic fitness-at the muscle and whole-body levels-improve endurance; 2) greater muscle anaerobic metabolism is associated with greater muscle strength, independent of muscle size; and 3) greater exercise endurance reduces weight gain.
机译：目的：研究目的是确定：1​​）肌肉代谢与运动表现之间的关系; 2）运动表现与体重增加率之间的关系。方法：对83名绝经前的黑人和白人女性进行了最大摄氧量（VO2max），等距四头肌和肱三头肌肱三头肌强度的评估，以及31P磁共振波谱分析了小腿肌肉的代谢能力。 1年后确定体重增加率。多元回归用于建模因变量。结果：在一个模型中，股四头肌的肌肉有氧能力和力量独立地影响了跑步机的耐力时间（总体R = 0.47，P <0.01），而在另一个模型中，股四头肌的最大摄氧量和力量独立地影响了ET。模型（R = 0.85，P <0.001）。在肌肉力量模型中，最大的肌酸激酶活性和最大的厌氧糖酵解速率在调整肱三头肌的横截面积后独立地有助于肱三头肌的力量（R = 0.63，P <0.001）。在另一个模型中，最大肌酸激酶活性与股四头肌强度无关，而与腿部瘦组织无关（R = 0.31，P <0.05）。体重增加率与肌肉代谢经济（r = -0.25，= 0.04），股四头肌力量（r = -0.34，P <0.01），最大摄氧量（r = -0.22，= 0.04）和ET（r =- 0.21，= 0.04）。体重增加率通过肌肉代谢经济性，最大摄氧量和股四头肌强度来建模（R = 0.48，P <0.01）。结论：研究结果的含义是：1）在肌肉和全身水平上增强力量和有氧适应性，提高耐力; 2）更大的肌肉无氧代谢与更大的肌肉力量有关，而与肌肉大小无关; 3）更大的运动耐力会减少体重增加。

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