A Comparison of High Energy Phosphate Metabolism and Anaerobic Threshold Between Athletes and Non Athletes during the Sustained Progressive Exercise

Journal of Exercise Nutrition & Biochemistry 1997;1(2):21-36.

Abstract

A
comparison of the high energy phosphate metabolism and anaerobic threshold in skeletal muscle between athletes and non athletes. The purpose of this study was compared with the differences of anaerobic threshold between ahtletes and non athletes. Intracellular high energy phosphate metabolism can be assessed non invasively and dynamically by in vivo ^31P nuclear magnetic resonance spectroscopy (NMRS) The results of this study were summarized as follows: There was a difference in PH change between athletes and non athletes during the sustained progressive exercise under the conditions of 1% MVC and 5% MVC (P < 0.05). There was a significant difference in PH change depending on the exercise adaptation capability. There was a difference in pi/pcr change-between athletes and non athletes during the sustained progressive exercise under the conditions of 1% MVC and 5% MVC (P < 0.05). In athletes the change of intracellular Pi/pcr showed palteau and pi/pcr tend to peak of MVC 5% in non athletes. PH of non athletes approached the PH- iT faster than that of athletes during the sustained progressive exercise under the conditions of 1% MVC and 5% MVC (P < 0.05). In well-trained athletes, accumulation of intracellular lactate in non athletes was delayed. Pi/Pcr of athletes approached the pi/pcr-iT slower than that of non athletes during the sustained progreddive exercise under the conditions of 1% MVC and 5% MVC (P < 0.05). Reaction rate of ADP and other high energy phosphorous metabolites during oxidative phosphorylation showed thresholding phenomena depending on the exercise duration intensity, and adaptable capability. The rare of pi/pcr recovery of non athletes was faster than that of athletes during the sustained progressive exercise under the conditions of 1% MVC and 5% MVC (P < 0.05). The recovery capabilities of all subjects after exhaustion showed a large variation depending on exercise intensity. The results of this study can be used in the non-invasive evaluation of training effects and provide useful data for exercise prescription in normal person. These result can also be used as data in the classification of future muscle type and determination of three factors of tranining intensity, frequency, and duration for patients with McArdle`s disease...