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High-intensity exercise training using a rotarod instrument (RotaHIIT) significantly improves exercise capacity in
Jonathan J Herrera1,2, Christopher M McAllister3, Danielle Szczesniak4
1Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, USA.
Physiological Reports
|May 2, 2024
Summary
A novel rotarod-based high-intensity interval training (RotaHIIT) protocol improves exercise capacity in mice without causing cardiac or muscle changes. This method offers a low-stress, compliant alternative to traditional forced exercise for research.
Area of Science:
- Exercise Physiology
- Cardiovascular Research
- Animal Models
Background:
- Exercise training in mice assesses cardiovascular disease and functional capacity.
- Forced exercise offers precise control but involves stress and injury risk.
- Existing methods limit compliance and applicability in mouse models.
Purpose of the Study:
- To develop a novel, high-intensity interval training (HIIT) protocol for mice using a rotarod.
- To evaluate the effectiveness and compliance of this new modality, termed RotaHIIT.
- To assess RotaHIIT's impact on exercise capacity, cardiac structure, and muscle oxidative capacity.
Main Methods:
- Implemented a rotarod-based high-intensity interval training (RotaHIIT) protocol.
- Assessed exercise capacity using treadmill graded exercise testing (GXT) and rotarod tests.
- Analyzed cardiac and skeletal muscle tissue for structural and oxidative capacity changes.
Main Results:
- RotaHIIT improved exercise capacity in mice, independent of sex.
- The protocol demonstrated excellent training compliance over time.
- No significant cardiac structural or functional changes were observed.
- No alterations in oxidative capacity in cardiac or skeletal muscle tissue were found.
Conclusions:
- RotaHIIT is a novel, effective, and compliant exercise training modality for mice.
- This protocol enhances exercise capacity without adverse cardiac or muscle adaptations.
- RotaHIIT offers a promising, easily implementable tool for diverse research investigations.
