1. Aerobic interval exercise with an eccentric contraction induces muscular hypertrophy and augmentation of muscular strength in rats
- Author
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Sadaaki Oki, Naomi Takamiya, Takeya Ono, Akira Otsuka, Namiko Umei, Michele Eisemann Shimizu, and Wakako Tsumiyama
- Subjects
medicine.medical_specialty ,Aerobic interval exercise ,Contraction (grammar) ,Strength training ,business.industry ,Muscular hypertrophy ,Skeletal muscle ,Physical Therapy, Sports Therapy and Rehabilitation ,Physical strength ,Muscle hypertrophy ,medicine.anatomical_structure ,Internal medicine ,medicine ,Physical therapy ,Cardiology ,Eccentric ,Aerobic exercise ,Original Article ,Treadmill ,business ,Augmentation of muscular strength - Abstract
[Purpose] The purpose of this study was to examine whether an aerobic interval exercise using an eccentric contraction would result in skeletal muscular hypertrophy and augmentation of muscular strength in rats. [Subjects and Methods] Twenty-one female Wistar rats were used in this study. The rats were randomly divided into three groups. The control group performed no exercise. The aerobic endurance exercise group ran for 90 min. The aerobic interval exercise group ran for a total of 90 minutes in 5 minute bouts separated by 2 minute rest periods. The exercise groups ran on a downhill treadmill incline, once every three days, for a total of twenty sessions. [Results] The muscle wet weights, the muscle fiber cross-section minor axes, and the tetanus tension results of the aerobic endurance and aerobic interval exercise groups were significantly larger than those of the control group. [Conclusion] These results indicate that aerobic interval exercise may be an effective method of inducing hypertrophy and augmenting muscular strength in skeletal muscle.
- Published
- 2015
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