Acute effects of exercise on MR imaging of skeletal muscle: concentric vs eccentric actions.

@article{Shellock1991AcuteEO,
  title={Acute effects of exercise on MR imaging of skeletal muscle: concentric vs eccentric actions.},
  author={Frank G. Shellock and Tetsuo Fukunaga and Jerrold H. Mink and V. Reggie Edgerton},
  journal={AJR. American journal of roentgenology},
  year={1991},
  volume={156 4},
  pages={765-8}
}
Eccentric (lengthening) muscle actions involve the forced lengthening of active muscles. Compared with concentric (shortening) muscle actions subjected to the same relative work load, eccentric actions have lower oxygen consumption requirements, fewer activated motor units, and less lactate production. This study was conducted to determine if T2-weighted MR could show any difference in muscles performing these specific types of actions and, therefore, be useful for physiologic investigations of… CONTINUE READING

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