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논문 기본 정보

자료유형
학술저널
저자정보
You, Jung-Wan (성신여자대학교) Choi, Seung-Wook (성신여자대학교)
저널정보
한국체육과학회 한국체육과학회지 한국체육과학회지 제26권 제4호 (자연과학 편)
발행연도
2017.8
수록면
1,049 - 1,059 (11page)
DOI
10.35159/kjss.2017.08.26.4.1049

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초록· 키워드

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To study the effects of carbohydrate (CHO) ingestion on intermittent fuel metabolism changes during prolonged treadmill walking, seven healthy male subjects performed 120 minutes walking on a treadmill at a speed of 80 m/min with (GLU) and without (CONT) glucose ingestion 1 hour prior to the exercise. During this experiment, blood samples were collected to analyze the concentrations of plasma glucose, lactate and triglyceride. Respiratory gas was carried into the gas analyzer to measure oxygen uptake (VO₂), elimination of carbon dioxide (VCO₂) and pulmonary ventilation (VE). The rates of CHO/fat oxidation were intermittently calculated by means of gas exchange measurements (CHO oxidation = 4.21*VCO₂ - 2.962*VO₂; Fat oxidation = 1.695*VO₂ - 1.701*VCO₂; Jeukendrup JE and Wallis GA, 2005). Plasma glucose was significantly higher (P<.05) in GLU than CONT from the onset of the exercise to the period of 60 min. There were no significant differences in triglyceride between GLU and CONT during exercise. Respiratory exchange rate (RER) decreased gradually in both experiments and showed higher in GLU than CONT throughout the exercise. More contribution of fat oxidation was found in CONT than GLU during the exercise. The contribution rates of CHO/fat oxidation were equal at 40 min and 120 min in CONT and GLU, respectively. The oxidation rates were approximately 300 mg/min in both experiments and there were no significant difference in the volumes of whole oxidation rates between GLU and CONT during the exercise. These findings suggest that prolonged walking at moderate speed glucose ingestion prevents consuming fat even after 120 min of exercise.

목차

Abstract
Ⅰ. Introduction
Ⅱ. Method
Ⅲ. Results
Ⅳ. Discussion
Ⅴ. Conclusion
Reference

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