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Related Concept Videos

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Updated: Jan 8, 2026

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Non-Specific Strength Changes Between High- and Low-Load Isotonic Resistance Training: A Systematic Review and

William B Hammert1, Ryo Kataoka1, Yujiro Yamada1

  • 1Kevser Ermin Applied Physiology Laboratory, Department of Health, Exercise Science, and Recreation Management, The University of Mississippi, P.O. Box 1848, University, MS, 38677, USA.

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This summary is machine-generated.

High-load and low-load isotonic resistance training appear similarly effective for increasing non-specific strength. Further research is needed to confirm if high-load training offers differential benefits for maximal strength development.

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Area of Science:

  • Exercise Physiology
  • Sports Science
  • Biomechanics

Background:

  • Comparisons of high- vs. low-load resistance training often use non-specific strength tests.
  • It is commonly suggested that both training loads equally enhance non-specific strength if performed to task failure.
  • Evidence supporting this claim requires further quantitative examination.

Purpose of the Study:

  • To quantitatively assess if high-load isotonic resistance training leads to different changes in non-specific strength compared to low-load training.
  • To provide a meta-analysis of existing research on this topic.

Main Methods:

  • Systematic literature search of PubMed, Scopus, and Embase up to June 14, 2025.
  • Inclusion criteria: healthy adults, high- vs. low-load isotonic training to task failure, non-specific strength measures (isometric/isokinetic), peer-reviewed English publications.
  • Random-effect meta-analysis of change scores in non-specific strength.

Main Results:

  • Ten studies with 245 participants were included.
  • Overall effect size (Cohen's d) was 0.322 (SE=0.17), not statistically significant (p=0.104).
  • Confidence intervals were wide and crossed zero, indicating inconclusive results.

Conclusions:

  • The current meta-analysis could not definitively conclude if high- and low-load isotonic training induce different changes in non-specific strength.
  • Results trended towards favoring high-load training, but wide confidence intervals limit definitive conclusions.