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Effect of precooling on physical performance in multiple sclerosis.
A T White1, T E Wilson, S L Davis
1Department of Exercise and Sport Science, University of Utah, Salt Lake City 84112, USA.
Multiple Sclerosis (Houndmills, Basingstoke, England)
|June 29, 2000
Summary
Precooling significantly reduces heat strain during exercise for individuals with multiple sclerosis (MS). This intervention improves physical function and comfort, potentially enabling greater participation in physical activity despite heat sensitivity.
Area of Science:
- Neurology
- Exercise Physiology
- Thermoregulation
Background:
- Heat sensitivity is a common challenge for individuals with multiple sclerosis (MS), often exacerbating symptoms and limiting physical activity.
- While exercise offers benefits for MS patients, heat-induced physiological strain can be a barrier to participation.
Purpose of the Study:
- To evaluate the impact of precooling on physical function in thermosensitive individuals with MS.
- To determine if precooling can mitigate the adverse effects of exercise-induced thermal load.
Main Methods:
- Six MS patients with heat sensitivity underwent exercise testing on a combined arm-leg ergometer.
- Participants performed a graded exercise test to establish maximal oxygen uptake (VO2max).
- Exercise at 60% VO2max was conducted under both noncooled and precooled conditions (30 min lower body immersion in 16-17°C water).
Main Results:
- No significant differences in maximal oxygen uptake (VO2max) were observed between conditions.
- Rectal temperature, heart rate, and rating of perceived exertion (RPE) were significantly lower during precooled exercise.
- Post-exercise, 25-ft walk performance and fatigue scores deteriorated significantly more in the noncooled condition.
Conclusions:
- Precooling effectively prevents core temperature increases during exercise in MS patients.
- This intervention enhances physical comfort and may enable individuals with MS to exercise more readily.
- Precooling shows promise for improving exercise participation and physical function in heat-sensitive MS populations.