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September 16, 2025Isokinetics and Exercise Science

Increasing stretch load lowers the mechanical efficiency of the quadriceps femoris muscle-tendon unit

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Authors

BKBálint KovácsYSYang SongJZJiongxiang Zhao

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Overview

Experiments reveal mechanical efficiency is lower with increased stretch-load and knee flexion angle.

Key Points

  • Mechanical efficiency drops by 17% as stretch load increases from 20 J to 100 J.
  • Both stretch load and knee flexion velocity significantly affect mechanical efficiency during contractions.
  • Vastus lateralis muscle activity was higher during the stretching phase than knee extensions at lower velocities.
  • Optimal combinations of stretch load and knee flexion may boost muscle-tendon efficiency in physical movements.

Cite This Study

Kovács et al. (2025) studied this question.

synapsesocial.com/papers/68d4539c31b076d99fa596fahttps://doi.org/10.1177/09593020251370584
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Also Consider

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

  1. 1Effects of Speed and Extent of Stretching on The Elastic Properties of Active Frog Muscle*1981 · 52 citations
  2. 2Tension changes during and after stretch in frog muscle fibres1972 · 124 citations
  3. 3Muscle damage induced by stretch-shortening cycle exercise1998 · 56 citations
  4. 4Influence of muscle‐belly and tendon gearing on the energy cost of human walking2022 · 19 citations
  5. 5Influence of Quadriceps Femoris Muscle and Tendon Morphology on Mechanical Efficiency During Stretch–Shortening Cycles2025 · 1 citations