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Exercise performance, core temperature, and metabolism after prolonged restricted activity and retraining in dogs
K Nazar1, J E Greenleaf, E Pohoska
1Department of Applied Physiology, Polish Academy of Sciences, Warsaw.
Aviation, Space, and Environmental Medicine
|August 1, 1992
Summary
Restricted activity (RA) significantly reduces exercise endurance and physiological function in dogs. However, retraining effectively restores these capabilities, highlighting the importance of physical activity for canine health.
Area of Science:
- Exercise Physiology
- Canine Sports Medicine
- Animal Physiology
Background:
- Physiological adaptations to restricted activity (RA) and subsequent retraining are not fully understood.
- Understanding these changes is crucial for maintaining canine health and performance.
Purpose of the Study:
- To investigate the physiological effects of 8 weeks of cage confinement (RA) on exercise endurance and related physiological markers in dogs.
- To assess the efficacy of an 8-week retraining program in reversing the effects of RA.
Main Methods:
- 10 male mongrel dogs underwent treadmill exercise tests under three conditions: control, after 8 weeks of RA, and after 8 weeks of retraining.
- Measurements included exercise endurance, rectal temperature, blood glucose, lactate, muscle glycogen, and plasma free fatty acid (FFA) levels.
Main Results:
- RA decreased exercise endurance by 41% and muscle glycogen by 32%.
- RA also impaired thermoregulation and the lipolytic response to exercise and noradrenaline.
- Retraining reversed these negative effects, increasing endurance by 30% above control levels and restoring muscle glycogen.
Conclusions:
- Restricted activity negatively impacts canine exercise capacity, muscle glycogen stores, thermoregulation, and lipolysis.
- An 8-week retraining program effectively reverses these detriments, restoring physiological function and enhancing exercise performance.