Van Zant R S, Conway J M, Seale J L
Department of Physical Therapy, University of Findlay, Findlay, Ohio 45840, USA.
J Sports Med Phys Fitness. 2002 Mar;42(1):31-7.
The purpose of this investigation was to study the effects of varied levels of dietary carbohydrate and fat intake on exercise training and high intensity exercise performance in moderately strength trained, aerobic trained and untrained males.
Subjects (6 strength trained, 6 aerobically trained serving as an active control group, 6 sedentary) consumed isoenergetic diets considered either high CHO/low fat (HC/LF: total energy 62% CHO, 20% fat, 18% protein) or moderate CHO and fat (MC/MF: total energy 42% CHO, 40% fat, 18% protein) in a randomly assigned crossover design. Each dietary treatment was three weeks in length. Prior to the study and following each dietary treatment, muscular strength and endurance was determined (isokinetic knee extension and flexion, standard concentric free weight bench press).
No differences as a result of the dietary treatment were seen in isokinetic peak torque, total work production, single repetition maximum (1 RM) bench press, or number of bench press repetitions at 80% 1 RM. Self-reported exercise log data showed no dietary effect on the subject's ability to maintain training level.
These findings indicate that varying dietary macronutrient content (HC/LF or MC/MF) had no effect on exercise training or strength exercise performance in moderately trained (aerobic and strength) or sedentary males.
本研究旨在探讨不同水平的膳食碳水化合物和脂肪摄入量对中度力量训练、有氧训练和未经训练男性的运动训练及高强度运动表现的影响。
受试者（6名力量训练者、6名有氧训练者作为活跃对照组、6名久坐者）采用随机交叉设计，摄入等能量饮食，分为高碳水化合物/低脂肪饮食（HC/LF：总能量的62%为碳水化合物，20%为脂肪，18%为蛋白质）或中等碳水化合物和脂肪饮食（MC/MF：总能量的42%为碳水化合物，40%为脂肪，18%为蛋白质）。每种饮食处理为期三周。在研究前及每种饮食处理后，测定肌肉力量和耐力（等速膝关节伸展和屈曲、标准同心自由重量卧推）。
在等速峰值扭矩、总功输出、单次重复最大重量（1RM）卧推或80% 1RM卧推重复次数方面，未发现饮食处理有差异。自我报告的运动日志数据显示，饮食对受试者维持训练水平的能力没有影响。
这些发现表明，改变膳食常量营养素含量（HC/LF或MC/MF）对中度训练（有氧和力量）或久坐男性的运动训练或力量运动表现没有影响。
