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Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
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Different Cluster-Loading Protocols Have No Effect on Intraset and Interset Power Expression.

Charles E P Dudley1, Eric J Drinkwater, Simon A Feros

  • 1Center for Sport Research (CSR), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Australia.

Journal of Strength and Conditioning Research
|June 22, 2022
PubMed
Summary
This summary is machine-generated.

Different cluster-loading protocols do not significantly alter power output during hang power clean (HPC) exercises. Basic cluster sets may offer practical advantages for maintaining peak power across repetitions compared to traditional or undulating protocols.

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Area of Science:

  • Sports Science
  • Strength and Conditioning
  • Biomechanics

Background:

  • Understanding the impact of various cluster-loading strategies on power expression is crucial for optimizing training.
  • Hang power clean (HPC) is a key exercise for developing explosive power in athletes.
  • Previous research has explored different set and repetition schemes, but the specific effects of cluster-loading protocols on HPC power characteristics require further investigation.

Purpose of the Study:

  • To investigate the effects of different cluster-loading protocols on intraset and interset power expression during the hang power clean (HPC).
  • To compare the efficacy of traditional, basic cluster, and undulating cluster protocols on power output and neuromuscular status.

Main Methods:

  • Ten trained weightlifters (7 male, 3 female) participated in a randomized repeated-measures design.
  • Participants completed four protocols: traditional, basic cluster, and two undulating cluster protocols, each involving 3 sets of 5 HPC repetitions.
  • Loads ranged from 60-80% of 1 repetition maximum (RM), with countermovement jumps (CMJs) assessed pre- and post-protocol.

Main Results:

  • Peak power was significantly higher in the fifth repetition of the basic cluster protocol compared to the traditional protocol (6.6 ± 2.8%).
  • Undulating load protocols did not significantly alter set power characteristics compared to basic cluster sets.
  • Peak power increased with increasing load within repetitions, suggesting suboptimal load prescription for power expression in this cohort.

Conclusions:

  • Cluster-loading protocols, particularly basic cluster sets, may be beneficial for maintaining peak power across repetitions and sets.
  • Coaches should consider inter-repetition rest strategies to optimize power output.
  • Basic cluster protocols are a practical option, eliminating the need for load adjustments between repetitions.