Related Experiment Videos
Spontaneous running increases VO2max and running performance in rats.
1Medical Research Council/University of Cape Town Bioenergetics of Exercise Research Unit, Observatory, South Africa.
Journal of Applied Physiology (Bethesda, Md. : 1985)
|January 1, 1990
Summary
Spontaneous running in rats improves maximal oxygen consumption (VO2max) and running economy. Rats running over 11.6 km/wk for 8 weeks show significant training adaptations.
Area of Science:
- Exercise Physiology
- Animal Models in Research
Background:
- Spontaneous physical activity is a natural behavior in rodents.
- Understanding exercise adaptations from voluntary running is crucial for animal model research.
Purpose of the Study:
- To investigate if spontaneous running activity induces significant training adaptations in rats.
- To evaluate the effects on maximal oxygen consumption (VO2max), running performance, and running economy (VO2submax).
Main Methods:
- Twenty male Long-Evans rats were housed in running wheels for 8 weeks.
- Rats were categorized into high-, average-, and low-performing groups based on running distance.
- Maximal running performance, VO2max, and VO2submax were assessed.
Main Results:
- Average-performing rats ran 52% longer than controls (P<0.01), showing improved running performance.
- VO2max increased by 12% in average-performing rats compared to controls (P<0.01).
- All running groups exhibited lower submaximal oxygen consumption (VO2submax), indicating enhanced running economy.
Conclusions:
- Spontaneous running exceeding 11.6 km/wk for 8 weeks constitutes a training effect in Long-Evans rats.
- Training adaptations include improved running performance, VO2max, and running economy.
- Poorly performing rats can be identified early, within 2 weeks of initiating running.