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Physical exercise during muscle regeneration improves recovery of the slow/oxidative phenotype
Author(s) -
Koulmann Nathalie,
RichardBulteau Hélène,
Crassous Brigitte,
Serrurier Bernard,
Pasdeloup Marielle,
Bigard Xavier,
Banzet Sébastien
Publication year - 2017
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.25151
Subject(s) - citrate synthase , medicine , endocrinology , skeletal muscle , myosin , soleus muscle , lactate dehydrogenase , biology , chemistry , enzyme , biochemistry
: As skeletal muscle mass recovery after extensive injury is improved by contractile activity, we explored whether concomitant exercise accelerates recovery of the contractile and metabolic phenotypes after muscle injury. Methods : After notexin‐induced degeneration of a soleus muscle, Wistar rats were assigned to active (running exercise) or sedentary groups. Myosin heavy chains (MHC), metabolic enzymes, and calcineurin were studied during muscle regeneration at different time points. Results : The mature MHC profile recovered earlier in active rats (21 days after injury) than in sedentary rats (42 days). Calcineurin was higher in the active degenerated than in the sedentary degenerated muscles at day 14. Citrate synthase and total lactate dehydrogenase (LDH) activity decreased after injury and were similarly recovered in both active and sedentary groups at 14 or 42 days, respectively. H‐LDH isozyme activity recovered earlier in the active rats. Conclusions : Exercise improved recovery of the slow/oxidative phenotype after soleus muscle injury. Muscle Nerve 55 : 91–100, 2017