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Related Experiment Videos

Gender differences during treadmill walking with graded loads: biomechanical and physiological comparisons.

Y Bhambhani1, R Maikala

  • 1Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada T6G 2G4. yagesh.bhambhani@ualberta.ca

European Journal of Applied Physiology
|November 7, 1999
PubMed
Summary

Women experience greater physiological stress and fatigue than men when carrying heavy loads. This suggests women may have a higher risk of cardiovascular issues during load carriage tasks.

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Area of Science:

  • Biomechanics
  • Human Physiology
  • Exercise Science

Background:

  • Understanding gender-based differences in physiological responses to load carriage is crucial for occupational safety and military applications.
  • Previous research indicates potential disparities in how men and women manage physical stress during demanding tasks.

Purpose of the Study:

  • To compare the biomechanical and physiological responses of healthy men and women during bilateral load carriage while walking.
  • To investigate gender-specific differences in oxygen uptake, cardiovascular stress, and load distribution during load carriage.

Main Methods:

  • Eleven men and 11 women walked on a treadmill carrying 15-kg and 20-kg loads using a custom device.
  • Measurements included oxygen uptake, cardiac output (via CO2 rebreathing), heart rate, and blood pressure.

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  • Load distribution between hands and body was quantified using strain gauges.

    • Main Results:

    • Women transferred a greater proportion of the load to their bodies by resting it against the chest.
    • Oxygen uptake increased more in women, exceeding the ventilatory threshold at 20 kg.
    • Cardiovascular stress (maximal heart rate and rate pressure product) was significantly higher in women.

    Conclusions:

    • Women exhibit greater physiological strain and cardiovascular stress compared to men under identical absolute load carriage conditions.
    • These findings suggest women may be more susceptible to fatigue and at a higher risk of cardiovascular complications during load carriage.
    • Load carriage strategies differ between genders, with women utilizing more passive body support.