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MedLine Citation:
PMID:  22228112     Owner:  NLM     Status:  Publisher    
The effect of inter-repetition rest (IRR) periods on power output during performance of multiple sets of power cleans is unknown. It is possible that IRR periods may attenuate the decrease in power output commonly observed within multiple sets. This may be of benefit for maximizing improvements in power with training. This investigation involved ten college aged males with proficiency in weightlifting. Subjects performed 3 sets of 6 repetitions of power cleans at 80% of their one repetition maximum with 0 (P0), 20 (P20), or 40 seconds (P40) of IRR. Each protocol (P0, P20, P40) was performed in a randomized order on different days each separated by at least 72 hours. Subjects performed the power cleans while standing on a force plate with two linear position transducers attached to the bar. Peak power, force, and velocity were obtained for each repetition and set. Peak power significantly decreased by 15.7% during P0 in comparison to a decrease of 5.5% (R1: 4303 ± 567 W, R6: 4055 ± 582 W) during P20 and a decrease of 3.3% (R1: 4549 ± 659 W, R6: 4363 ± 476 W) during P40. Peak force significantly decreased by 7.3% (R1: 2861 ± 247 N, R6: 2657 ± 225 N) during P0 in comparison to a decrease of 2.7% (R1: 2811 ± 327 N, R6: 2730 ± 285 N) during P20 and an increase of 0.4% (R1: 2861 ± 323 N, R6: 2862 ± 280 N) during P40. Peak velocity significantly decreased by 10.2% (R1: 1.97 ± 0.15 m/s, R6: 1.79 ± 0.11 m/s) during P0 in comparison to a decrease of 3.8% (R1: 1.89 ± 0.13 m/s, R6: 1.82 ± 0.12 m/s) during P20 and a decrease of 1.7% (R1: 1.93 ± 0.17 m/s, R6: 1.89 ± 0.14 m/s) during P40. The results demonstrate IRR periods allow for maintenance of power in the power clean during a multiple set exercise protocol and this may have implications for improved training adaptations.
J P Hardee; N T Triplett; A C Utter; K A Zwetsloot; J M McBride
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-05
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Appalachian State University, Department of Health, Leisure & Exercise Science, Neuromuscular & Biomechanics Laboratory, Boone, NC 28607.
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