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Force-Time Differences between Ballistic and Non-Ballistic Half-Squats.

Timothy J Suchomel1, Christopher B Taber2, Christopher J Sole3

  • 1Department of Human Movement Sciences, Carroll University, Waukesha, WI 53186, USA. tsuchome@carrollu.edu.

Sports (Basel, Switzerland)
|August 15, 2018
PubMed
Summary
This summary is machine-generated.

Performing ballistic intent concentric-only half-squats (COHS) generates greater peak force and impulse compared to non-ballistic intent. This suggests ballistic intent may offer a superior training stimulus for resistance-trained individuals.

Keywords:
intentpartial squatresistance trainingstrength

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Area of Science:

  • Biomechanics
  • Exercise Physiology
  • Sports Science

Background:

  • Understanding force-time characteristics in resistance training is crucial for optimizing performance and training adaptations.
  • Concentric-only half-squats (COHS) are a common exercise, but the influence of movement intent (ballistic vs. non-ballistic) on force production requires further investigation.

Purpose of the Study:

  • To compare the force-time differences between ballistic (BAL) and non-ballistic (NBAL) concentric-only half-squats (COHS) across various external loads.
  • To determine if BAL intent enhances peak force and impulse compared to NBAL intent during COHS.

Main Methods:

  • Eighteen resistance-trained men performed COHS with BAL and NBAL intent at 30%, 50%, 70%, and 90% of their one-repetition maximum (1RM).
  • Relative peak force (PF) and impulse (Imp50, Imp90, Imp200, Imp250) were measured and analyzed using repeated measures ANOVAs.
  • Cohen's d effect sizes were calculated to assess practical significance.

Main Results:

  • Ballistic intent COHS produced significantly greater relative peak force across all tested loads (30% to 90% 1RM) compared to NBAL COHS.
  • Statistically significant differences in load-averaged impulse were observed for Imp90, Imp200, and Imp250, favoring the BAL condition.
  • No significant difference in early-phase impulse (Imp50) was found between BAL and NBAL COHS.

Conclusions:

  • Performing COHS with ballistic intent results in superior peak force production compared to non-ballistic intent.
  • The findings suggest that incorporating ballistic intent into COHS may provide a more potent training stimulus for enhancing force production and potentially other performance adaptations.