Muscle activation, blood lactate, and perceived exertion responses to changing resistance training programming variables

作者：Hiscock, Daniel J.^*; Dawson, Brian; Donnelly, Cyril J.; Peeling, Peter

来源：European Journal of Sport Science, 2016, 16(5): 536-544.

DOI：10.1080/17461391.2015.1071880

• Work rate
• fatigue
• tonnage
• EMG
• rest duration

Ratings of perceived exertion (RPE: 0-10) during resistance training with varying programming demands were examined. Blood lactate (BLa) and muscle activation (using surface electromyography: EMG) were measured as potential mediators of RPE responses. Participants performed three sets of single arm (preferred side) bicep curls at 70% of 1 repetition maximum over 4 trials: Trial (A) 3 sets x 8 repetitions x 120 s recovery between sets; (B) 3 sets x 8 repetitions x 240 s recovery; (C) 3 sets x maximum number of repetitions (MNR) x 120 s recovery; (D) 3 sets x MNR x 240 s recovery. Overall body (RPE-O) and active muscle (RPE-AM) perceptual responses were assessed following each set in each trial. Biceps brachii and brachioradialis muscle EMG was measured during each set for each trial. RPE-O and RPE-AM were not different between Trial A (3.5 +/- 1 and 6 +/- 1, respectively) and Trial B (3.5 +/- 1 and 5.5 +/- 1, respectively) (p<.05). However, RPE-AM was significantly greater in Trial C (7.5 +/- 1.5) and Trial D (7.5 +/- 1.5) than in Trial B (p<.05). There were no significant differences in muscle activation or BLa between trials; however, work rate (tonnage/min) was greater in Trials C and D compared to Trial B. In conclusion, BLa and muscle activation were not related to RPE, but resistance training variables, such as work rate, may impact on RPE when intensity (%1RM) and the number of sets completed remain constant.

• 出版日期2016