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In Vivo ^31P NMR Spectroscopy를 이용하여 젖산 운동시간과 유산소 운동시간에 따른 골격근 섬유의 고 에너지 인(P) 대사 변화
성기홍,임태환,이대근,문치웅,이정희,김상태,신명진,이덕분 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.1
Intracellular high energy phosphorus metabolism can be assessed noninvasively and dynamically by in vivo ^31P NMRS of skeletal muscle have shown various applications of this technique in evaluating the pathophysiology of diseased or normal muscles. High energy phosphate metavolsim in the human skeletal muscle was studies in the work. ^31P nuclear magnetic resonance spectroscopy allowed the evaluate of the lactic acid and aerobic energy system in the intracellular skeletal muscle by energy concentration of ^31P nuclear magnetic resonance spectroscopy allowed the evaluate of the lactic acid and aerobic energy system in the intracellular skeletal muscle by energy concentration of ^31P metabolite, (Pi), (PCr), (ATP). The ratio of Pi/PCr the spectra measured from normal volanteers and elite athleties indicated a signetifcant difference between the two group for each exercise protocal. It was generally ovserved that the all out time of normal volunteers in shorter that that of elite athletes, and the ration of Pi/PCr is samller for elite athlets than for normal volunteers.
성기홍,임태환,신명진,이대근,문치웅,김상태,이덕분 대한스포츠의학회 1993 대한스포츠의학회지 Vol.11 No.1
Nuclear Magnetic Resonance Spectroscopy(NMRS) is biochemical sampling technique that allows the noninvasive quantification of several biomolecules in vivo. Nuclear Magnetic Resonance Spectroscopy to noninvasivly and repeatedly follow muscle metabolism during rest and exercise. We used phorsphorus Magnetic Resonance Spectroscopy to study skeletal muscle metabolism of pro-ball pichter(n=4) The subjects performed work by depressing a pully attached to an isometric contraction of progressive exercise. Relative concentration of Pi and PCr were measured along with intracelluiar pH. Measurements were made at rest during exercise, during recovery from exercise protocol. As a results were ; 1. A variation of pH A recovery after pichting ball. A rest to intracellular from 7.001±0.02 to 6.975±0.04 after Ⅰ Set pichting ball, and become a recovery intracellular pH 6.979±0.04 after 5min(p=0.01), and significant(p<0.05). A rest to intracellular pH from 7.001±0.02 to 6.979±0.06 after Ⅱ Set pichting ball, and become a recovery intracellular pH 6.996±0.02 after 5min(p=0.264), and not significant(p<0.05).
31P MR Spectroscopy를 이용한 생체내 골격근의 무산소성 및 유산소성 운동에 의한 대사 변화
김철준,신명진,김성수,김동희,성기홍 대한스포츠의학회 1996 대한스포츠의학회지 Vol.14 No.1
The phosphocreatine concentration ([PCr]) falls during exercise by forming an equimolar amount of inorganic phosphate ([Pi]) as described by the creatineinase reaction. Metabolic cycles employed during the exercise are governed by the level of oxygen supply. Therefore, depending the level of oxygen during the exercise, the exercise can be described by three major categories, which may be attributed from the intensity, frequency, and duration of the exercise : anaerobic, lactic acid, and aerobic exercises. In the present work, the time course of changes in [Pi/PCr] during the maximal intermittent isokinetic exercise of forearm muscle, which involves the three categories, were measured by in vivo ^31P MR spectroscopy. Compare the time course of changes in [Pi/PCr] between sedentaries and trained oarsman during the maximal intermittent isokinetic exercise. Characterise the aerobic and anaerobic exercises by observing different time course of changes in[Pi/PCr]. Forearm(nondominant side) muscle of each subject was placed in the center of RF coil, which was doubly tuned for the ^1H and ^32P resonance frequencies of 200.21 MH and 81.0 MH respectively (Bruker, Switzerland). Forearm flexion was performed with a fixed 0.5 P by a home made ergometer. In vivo 31P MR Spectroscopy was performed on a Bruker Biospec 4.7T lmaging and Spectroscopy System (Bruker, Fa¨allanden, Switzerland). Shimming was done on the ^1H signal, and the ^31P signal was obtained from M.Flex or Digitorum Superficialis. A series of spectrum was acquired before the initial exercise starts and during the time intervals, 1 minute between exercises. Peak areas were measured by integration. Subjects were ordered to do the forearm flexion exercises. For Group 1 (n=10), trained oarsmen were subjected to series of 30, 90 or 180 seconds of exercises intervaled by 1 minute of resting period until 20 minutes passed the all-out, and for Group 2, sedentaries (n=10) were employed, as a control group, to do the same exercise protocol as for the oarsmen. ^31P MR spectra of the forearm muscle before exercise, during exercise, at the end of the exercise(i.e.all-out). For the maximal intermittent 90 seconds isokinetic exercise, the ratio of[Pi/PCr] of the trained oarsmen has the value of 0.9±0.07 at the plateau during about 25 minutes of the exercise. In contrary, the value of the sedentaries is continuously rising until the all-out, during about 10 minutes of the exercise. For the maximal intermittent 180 seconds isokinetic exercise, the ratio of [Pi/PCr] of the trained oarsmen has the value of 0.65±0.07 at the plateau during about 20 minutes of the exercise. In contrary, the value of the sedentaries is continuously rising until the all-out, during about 8 minutes of the exercise. The plateau achieved in the time course of [Pi/PCr] during the exercise by the trained oarsmen may indicate that the exercise can be categrized as the aerobic exercise. The continuously rising [Pi/PCr] observed during the exercise by the sedentaries may indicate that the exercise can be categorized as the anaerobic exercise. We may deduce a conclusion from the above that the accumulation of the [Pi/PCr] may not be an indication of the fatigue