Shimano Tomoko, Kraemer William J, Spiering Barry A, Volek Jeff S, Hatfield Disa L, Silvestre Ricardo, Vingren Jakob L, Fragala Maren S, Maresh Carl M, Fleck Steven J, Newton Robert U, Spreuwenberg Luuk P B, Häkkinen Keijo
Human Performance Laboratory, Department of Kinesiology, University of Connecticut, Storrs, CT 06269, USA.
J Strength Cond Res. 2006 Nov;20(4):819-23. doi: 10.1519/R-18195.1.
Resistance exercise intensity is commonly prescribed as a percent of 1 repetition maximum (1RM). However, the relationship between percent 1RM and the number of repetitions allowed remains poorly studied, especially using free weight exercises. The purpose of this study was to determine the maximal number of repetitions that trained (T) and untrained (UT) men can perform during free weight exercises at various percentages of 1RM. Eight T and 8 UT men were tested for 1RM strength. Then, subjects performed 1 set to failure at 60, 80, and 90% of 1RM in the back squat, bench press, and arm curl in a randomized, balanced design. There was a significant (p < 0.05) intensity x exercise interaction. More repetitions were performed during the back squat than the bench press or arm curl at 60% 1RM for T and UT. At 80 and 90% 1RM, there were significant differences between the back squat and other exercises; however, differences were much less pronounced. No differences in number of repetitions performed at a given exercise intensity were noted between T and UT (except during bench press at 90% 1RM). In conclusion, the number of repetitions performed at a given percent of 1RM is influenced by the amount of muscle mass used during the exercise, as more repetitions can be performed during the back squat than either the bench press or arm curl. Training status of the individual has a minimal impact on the number of repetitions performed at relative exercise intensity.
抗阻训练强度通常规定为1次最大重复量（1RM）的百分比。然而，1RM百分比与允许的重复次数之间的关系仍未得到充分研究，尤其是在使用自由重量训练时。本研究的目的是确定受过训练（T）和未受过训练（UT）的男性在自由重量训练中，以不同百分比的1RM进行训练时能够完成的最大重复次数。对8名T组男性和8名UT组男性进行了1RM力量测试。然后，受试者在随机、平衡设计的后深蹲、卧推和臂弯举中，以1RM的60%、80%和90%进行1组至力竭训练。存在显著的（p < 0.05）强度×训练项目交互作用。对于T组和UT组，在1RM的60%时，后深蹲的重复次数多于卧推或臂弯举。在1RM的80%和90%时，后深蹲与其他训练项目之间存在显著差异；然而，差异不太明显。在给定训练强度下，T组和UT组之间的重复次数没有差异（除了在1RM的90%进行卧推时）。总之，在给定的1RM百分比下进行的重复次数受训练中使用的肌肉量影响，因为后深蹲比卧推或臂弯举能进行更多的重复次数。个体的训练状态对相对训练强度下的重复次数影响最小。
