Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine ( 2017 ) 16 , 407 - 413

Research article
Power-Time Curve Comparison between Weightlifting Derivatives
Timothy J. Suchomel1, , Christopher J. Sole2
Author Information
1 Department of Human Movement Sciences, Carroll University, Waukesha, WI, USA
2 Department of Health, Exercise, and Sport Science, The Citadel – The Military College of South Carolina, Charleston, SC, USA

Timothy J. Suchomel
✉ PhD Department of Human Movement Sciences, Carroll University Waukesha, WI, USA 53186
Email: tsuchome@carrollu.edu
Publish Date
Received: 08-06-2017
Accepted: 17-07-2017
Published (online): 08-08-2017
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ABSTRACT

This study examined the power production differences between weightlifting derivatives through a comparison of power-time (P-t) curves. Thirteen resistance-trained males performed hang power clean (HPC), jump shrug (JS), and hang high pull (HHP) repetitions at relative loads of 30%, 45%, 65%, and 80% of their one repetition maximum (1RM) HPC. Relative peak power (PPRel), work (WRel), and P-t curves were compared. The JS produced greater PPRel than the HPC (p < 0.001, d = 2.53) and the HHP (p < 0.001, d = 2.14). In addition, the HHP PPRel was statistically greater than the HPC (p = 0.008, d = 0.80). Similarly, the JS produced greater WRel compared to the HPC (p < 0.001, d = 1.89) and HHP (p < 0.001, d = 1.42). Furthermore, HHP WRel was statistically greater than the HPC (p = 0.003, d = 0.73). The P-t profiles of each exercise were similar during the first 80-85% of the movement; however, during the final 15-20% of the movement the P-t profile of the JS was found to be greater than the HPC and HHP. The JS produced greater PPRel and WRel compared to the HPC and HHP with large effect size differences. The HHP produced greater PPRel and WRel than the HPC with moderate effect size differences. The JS and HHP produced markedly different P-t profiles in the final 15-20% of the movement compared to the HPC. Thus, these exercises may be superior methods of training to enhance PPRel. The greatest differences in PPRel between the JS and HHP and the HPC occurred at lighter loads, suggesting that loads of 30-45% 1RM HPC may provide the best training stimulus when using the JS and HHP. In contrast, loads ranging 65-80% 1RM HPC may provide an optimal stimulus for power production during the HPC.

Key words: Hang power clean, jump shrug, hang high pull, mechanical work, time normalization


           Key Points
  • The JS and HHP exercises produced greater relative peak power and relative work compared to the HPC.
  • Although the power-time curves were similar during the first 80-85% of the movement, the JS and HHP possessed unique power-time characteristics during the final 15-20% of the movement compared to the HPC.
  • The JS and HHP may be effectively implemented to train peak power characteristics, especially using loads ranging from 30-45% of an individual’s 1RM HPC.
  • The HPC may be best implemented using loads ranging from 65-80% of an individual’s 1RM HPC.
 
 
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