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Endurance training of trunk extensor muscles

M T Moffroid1, L D Haugh, A J Haig

  • 1Department of Physical Therapy, University of Vermont, Burlington 05401.

Physical Therapy
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

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An endurance exercise program significantly improved trunk extensor isometric holding time in women. However, physiological measures of muscle fatigue did not show significant changes with training.

Area of Science:

  • Exercise Physiology
  • Muscle Fatigue
  • Biomedical Engineering

Background:

  • Assessing the impact of endurance exercise on trunk extensor muscles.
  • Investigating both mechanical and physiological measures of muscle fatigue.

Purpose of the Study:

  • To evaluate the effects of a 6-week endurance exercise protocol.
  • To measure changes in isometric holding time (mechanical fatigue).
  • To analyze median frequency (MF) from surface electromyography (physiological fatigue).

Main Methods:

  • 28 healthy female volunteers participated.
  • Subjects were stratified by activity level and assigned to exercise or control groups.
  • Training involved a 6-week home-based, twice-daily exercise protocol.

Related Experiment Videos

Main Results:

  • The exercise group demonstrated a 22% increase in isometric holding time.
  • No significant changes were observed in the control group.
  • Median frequency (MF) measurements remained stable, with no significant change in slope during fatigue.

Conclusions:

  • The home exercise program effectively enhanced isometric endurance of trunk extensors.
  • Physiological fatigue measures (MF) did not correlate with training-induced improvements in this cohort.
  • Further research is needed to understand the discrepancy between mechanical and physiological fatigue measures.