Resistance Training during Chemotherapy with Doxorubicin.

Medicine and Science in Sports and Exercise
Eric BredahlKristen M Drescher

Abstract

Previous research has shown that resistance training (RT) before doxorubicin (DOX) treatment attenuates the decline in muscle dysfunction; however, the effect of RT during DOX treatment is less known. Investigate the effects of RT before and during a 4-wk course of incremental DOX treatment on skeletal muscle function. Male, Sprague-Dawley rats (N = 36) were randomly assigned to the following groups: sedentary+saline (SED + SAL), sedentary+DOX (SED + DOX), RT + SAL, or RT + DOX. The RT protocol utilized a raised cage model, which provided progressive hindlimb loading throughout the 14-wk study, whereas SED animals were kept in normal housing. Starting at week 10, DOX-treated animals received 3 mg·kg DOX weekly for 4 wk (12 mg·kg cumulative); whereas SAL-treated groups received 0.9% NaCl as a placebo. Grip strength was recorded at 0, 10, 12, and 14 wk. Ex vivo muscle function was performed on excised soleus (SOL) and extensor digitorum longus (EDL) from the right hind limb 5 d after the last injection and were analyzed for expression of creatine kinase (CK) and creatine transporters. SED + DOX-treated animals had significantly lower EDL mass compared with SED + SAL- and RT + DOX-treated animals. Grip strength, EDL maximal force,...Continue Reading

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Sep 29, 2020·Frontiers in Physiology·Brandon N VanderVeenJames A Carson

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