TY  - JOUR
AU  - Yoshida, Takayoshi
A2  - Yoshida, Takayoshi
A2  - Watari, Hiroshi
DB  - BISp
DP  - BISp
KW  - ATP
KW  - Kreatinphosphat
KW  - Magnetresonanztomographie
KW  - Muskelstoffwechsel
KW  - Muskeluntersuchung
KW  - pH-Wert
KW  - Phosphat
KW  - Phosphat, energiereiches
KW  - Skelettmuskulatur
KW  - Spektroskopie
KW  - Sportmedizin
LA  - eng
TI  - Exercise-induced splitting of the inorganic phosphate peak : investigation by time-resolved 31P-nuclear magnetic resonance spectroscopy
TT  - Belastungsbedingte Teilung des Gipfels der anorganischen Phosphate : Untersuchung mittels 31P-NMR-Spektroskopie mit zeitlicher Auflösung
PY  - 1994
N2  - To investigate the splitting of the inorganic phosphate (Pi) peak during exercise and recovery, a time-resolved 31-phosphorus nuclear magnetic resonance-spectroscopy (31-P-MRS) technique was used. Seven healthy young sedentary male subjects performed knee flexion exercise in the prone position inside a 2.1-T magnet, with the surface coil for 31P-MRS being placed on the biceps femoris muscle. After a 1-min warm-up without loading, the exercise intensity was increased by 0.41 W at 15-s intervals until exhaustion, followed by a 5-min recovery period. The 31-P-MRS were recovered every 5 s during the rest-exercise-recovery sequence. Computer aided contour analysis and pixel imaging of the Pi and phosphocreatine peaks were performed. Five of the seven subjects showed two distinct Pi peaks during exercise, suggesting two different pH distributions in exercising muscle (high pH and low pH region). In these five subjects, the high-pH increased rapidly just after the onset of exercise, while the low-pH peak increased gradually approximately 60 s after the onset of exercise. During recovery, the disappearance of the high-pH peak was more rapid than that of the low-pH peak. These findings suggest that our method 31-P-MRS provides a simple approach four studying the kinetics of the Pi peak and intramuscular pH during exercise and recovery.
L2  - https://dx.doi.org/10.1007/BF00239861
DO  - 10.1007/BF00239861
SP  - S. 465-473
SN  - 1439-6319
JO  - European journal of applied physiology
IS  - 6
VL  - 69
M3  - Gedruckte Ressource
M3  - Elektronische Ressource (online)
ID  - PU199501100258
ER  -