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This consists of four lectures given by Professor Hill at Johns Hopkins University. In these lectures are set forth in some detail the results of investigations on the physiology of muscular activity and the nature of muscular contraction conducted by Professor Hill and his associates, and by Professors Meyerhof of Germany, Krogh of Copenhagen, and Hopkins and Fletcher of Cambridge University, England. The ingenious methods developed by these authors for further elucidation of the physical and chemical phenomena in muscular contraction are described. Among the interesting conclusions arrived at are that oxygen is needed, not for muscular contraction, but for the recovery of the muscle after contraction, and that the only source of energy for muscular contraction is glycogen and not, as Lusk maintains, also fat. The fourth lecture deals particularly with recovery processes after exercise in man. This chapter is of particular interest to those interested in physical therapy
Muscular Activity.. JAMA. 1926;86(8):574. doi:10.1001/jama.1926.02670340052035
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