Dudgeon Wesley D, Kelley Elizabeth P, Scheett Timothy P
Department of Health and Human Performance, College of Charleston, Charleston, South Carolina.
J Strength Cond Res. 2017 May;31(5):1353-1361. doi: 10.1519/JSC.0000000000001196.
Dudgeon, WD, Kelley, EP, and Scheett, TP. Effect of whey protein in conjunction with a caloric-restricted diet and resistance training. J Strength Cond Res 31(5): 1353-1361, 2017-Caloric-restricted weight loss, especially rapid weight loss, results from a decrease in both lean and fat mass (FM). The goal for many is to lose FM while retaining lean body mass (LBM) and muscular performance thus many turn to supplements. Sixteen resistance-trained men (24 ± 1.6 years of age) completed a 4 d·wk body building style split resistance training program for 8 weeks in conjunction with a pre-exercise, periexercise, and postexercise ingestion of whey protein (WHEY) nutritional supplement or carbohydrate (CON)-based nutritional supplement. There were no differences in body mass change between the WHEY and CON groups although both groups lost body mass (p ≤ 0.05); however, WHEY group maintained LBM whereas the CON group lost (p ≤ 0.05), and the WHEY group lost FM (p > 0.05) and the CON group did not, although the change in FM between groups was not different. Both the WHEY and CON (p ≤ 0.05) groups significantly increased lower-body strength. The WHEY group increased upper-body strength (p ≤ 0.05), whereas the CON did not change. Both groups (p ≤ 0.05) increased lower-body repetitions to fatigue with the increase greater in the CON group (p ≤ 0.05). The CON group also increased upper-body repetitions (p ≤ 0.05) whereas WHEY did not. WHEY group lost body mass, composed of FM, whereas CON also experienced a loss in body mass, but this loss was due to decrease in LBM. Neither group experienced a loss in muscle performance, with the WHEY group tending to show improvement in strength and CON group in endurance. These data indicate WHEY supplementation compared with carbohydrate supplementation, during a caloric-restricted "cut" diet can assist in maintaining LBM while allowing for the loss of FM.
达金、WD、凯利、EP和谢特、TP。乳清蛋白与热量限制饮食及抗阻训练相结合的效果。《力量与体能研究杂志》31(5)：1353 - 1361，2017年——热量限制导致的体重减轻，尤其是快速体重减轻，是由于瘦体重和脂肪量（FM）均减少所致。许多人的目标是在减少脂肪量的同时保留瘦体重（LBM）和肌肉功能，因此许多人求助于补充剂。16名经过抗阻训练的男性（24±1.6岁）进行了为期8周的每周4天的健美风格的分化抗阻训练计划，同时在运动前、运动中及运动后摄入乳清蛋白（WHEY）营养补充剂或碳水化合物（CON）基营养补充剂。WHEY组和CON组的体重变化无差异，尽管两组体重均减轻（p≤0.05）；然而，WHEY组维持了瘦体重，而CON组瘦体重减少（p≤0.05），WHEY组脂肪量减少（p>0.05），CON组脂肪量未减少，尽管两组间脂肪量的变化无差异。WHEY组和CON组（p≤0.05）的下肢力量均显著增加。WHEY组上肢力量增加（p≤0.05），而CON组未改变。两组（p≤0.05）的下肢疲劳重复次数均增加，CON组增加幅度更大（p≤0.05）。CON组上肢重复次数也增加（p≤0.05），而WHEY组未增加。WHEY组体重减轻，由脂肪量组成，而CON组体重也减轻，但这种减轻是由于瘦体重减少。两组肌肉功能均未下降，WHEY组力量有改善趋势，CON组耐力有改善。这些数据表明，在热量限制的“减脂”饮食期间，与补充碳水化合物相比，补充乳清蛋白有助于维持瘦体重，同时实现脂肪量的减少。
