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November 18, 2025Applied SciencesOpen Access

The Effect of Lightweight Wearable Resistance on the Squat and Countermovement Jumps: Does Load Dampen the Performance-Enhancing Effect of the Stretch-Shortening Cycle?

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Authors

HKHamish KyneJCJohn B. Cronin

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Overview

Kinetics and kinematics of squat and countermovement jumps declined under lightweight wearable resistance, indicating varied performance impacts.

Key Points

  • This research examines how lightweight wearable resistance affects squat and countermovement jump performance.
  • Assessed 20 male athletes using force plates during squat jumps and countermovement jumps with varying resistance loads of 2%, 4%, and 6% body mass.
  • Evaluated key variables including jump height, concentric and eccentric phase durations, concentric impulse, mean force, mean velocity, and mean power.
  • Calculated elastic utilization ratios to measure stretch-shortening cycle enhancement.
  • Jump height and mean velocity significantly reduced under lightweight resistance, with the greatest declines observed at 2% body mass.
  • Absolute metrics showed limited sensitivity to load, while relative metrics revealed substantial declines, indicating potential misrepresentation by absolute values.
  • Kinematics and kinetics indicated differing responses in squat jumps and countermovement jumps due to varying muscle-tendon unit dynamics.

Cite This Study

Kyne et al. (2025) studied this question.

synapsesocial.com/papers/6924fef4c0ce034ddc351cb6https://doi.org/10.3390/app152212206
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Beyond Jump Height: Load-Dependent Effects of Lightweight Wearable Resistance on Countermovement and Drop Jump Biomechanics2026
  2. 2A comparison of weighted countermovement jumps loading modes using wearable accelerometers2024
  3. 3Effects of External Load on the Contribution of Tendon Dynamics During Stretch-Shortening Cycle Exercises2025 · 1 citations
  4. 4Force Plate Assessment of Neuromuscular Jump Performance Under Loaded and Unloaded Conditions in Military Personnel2026
  5. 5The Impact of Jump Type on Muscle Contractile Behavior: Fatigue or Potentiation After Countermovement and Stiffness Jumps?2025