Effect of Passive and Active Recovery on PCr Kinetics

  • Takayoshi Yoshida
  • Hiroshi Watari


Recently, 31phosphorus-nuclear magnetic resonance spectroscopy (31P-MRS) has been used as a noninvasive technique to measure changes in the concentrations of adenosine 5’-triphosphate (ATP), phosphocreatine (PCr) and inorganic phosphate (Pi), as well as the intramuscular pH, both during and after exercise. Splitting of the Pi peak into two has been observed during exercise and is attributable to two different pH distributions in exercising muscle (high pH and low pH) (1, 3, 5, 8, 11, 15). Previously, we reported that the two split Pi peaks showed different time courses at the onset of exercise and during recovery (16, 19, 22); high-pH Pi increased promptly at the onset of exercise and disappeared rapidly after exercise, while the low-pH Pi peak increased gradually after a delay of approximately 60 sec at the onset of exercise and decreased over a longer period after exercise was stopped.


Active Recovery Recovery Test Passive Recovery Repeated Exercise Glycolytic Fiber 
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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Takayoshi Yoshida
    • 1
  • Hiroshi Watari
    • 1
  1. 1.Exercise Physiology LaboratoryFaculty of Health and Sports Sciences Osaka UniversityToyonakaJapan

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