Document Detail

Satellite cell pool enhancement in rat plantaris muscle by endurance training depends on intensity rather than duration.
MedLine Citation:
PMID:  22040028     Owner:  NLM     Status:  Publisher    
Aim:  Increases in the number of satellite cells are necessary for the maintenance of normal muscle function. Endurance training enhances the satellite cell pool. However, it remains unclear whether exercise intensity or exercise duration is more important to enhance the satellite cell pool. This study examined the effects of different intensity and duration of endurance training on the satellite cell pool in rat skeletal muscle. Methods:  Forty-one 17-week-old female Sprague-Dawley rats were assigned to control (n = 8), high intensity and high duration (n = 7), high intensity and low duration (n = 8), low intensity and high duration (n = 9), and low intensity and low duration (n = 9) groups. Training groups exercised 5 days per week on a motor driven treadmill for 10 weeks. After the training period, animals were anaesthetized and the plantaris muscles were removed, weighed, and analyzed for immunohistochemical and histochemical properties. Results:  Although no significant differences were found in muscle mass, mean fibre area and myonuclei per muscle fibre between all groups, the percentage of satellite cells was significantly higher in the high-intensity groups than in the other groups (p < 0.05). Conclusion:  Increases in the satellite cell pool of skeletal muscle following endurance training depend on the intensity rather than duration of exercise.
Mitsutoshi Kurosaka; Hisashi Naito; Yuji Ogura; Shuichi Machida; Shizuo Katamoto
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-10-31
Journal Detail:
Title:  Acta physiologica (Oxford, England)     Volume:  -     ISSN:  1748-1716     ISO Abbreviation:  -     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-11-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101262545     Medline TA:  Acta Physiol (Oxf)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Scandinavian Physiological Society.
Department of Exercise Physiology, School of Physical Education, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292, JAPAN Department of Exercise Physiology, School of Health and Sports Science, Juntendo University, 1-1 Hiragagakuendai, Inba, Chiba 270-1695, JAPAN Department of Physiology, St. Marianna University School of Medicine, Kawasaki, Japan 216-8511.
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