著者

中島 英洋 笠間 基寛 中井 麻美 西岡 美和子 藤森 麻里榮 宝谷 美智子

出版者

大阪青山大学『大阪青山大学紀要』編集委員会

雑誌

大阪青山大学紀要 = Journal of Osaka Aoyama University (ISSN:18833543)

巻号頁・発行日

vol.2, pp.9-17, 2009-03-31

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Controlling postprandial hyperglycemia has been recognized to be beneficial for prevention and reduction of cardiovascular risks in diabetic patients. In this study, we evaluated acute effects of exercise after meal ingestion on postprandial blood glucose in order to develop an exercise prescription for reduction of the spike-like blood glucose elevation. Five healthy women ingested 200 g of rice and exercised (slow-paced walking, fast-paced walking or jogging) for 25 minutes at 30 minutes after the meal ingestion. For further evaluation of the acute effects of muscle contraction on blood glucose, we also examined a foot bath which increased the local blood flow in the muscles of the lower legs without muscle contraction, and combinatorial number-placement puzzles (Sudoku) which activated brain activity. Blood glucose was measured in fasting and at 30, 60, and 120 min after meal ingestion.Control data were obtained from the same subjects in the sitting position during the experiment. At the end of exercise, all the exercise lowered blood glucose by 40~50mg/dL compared with the control.(p<0.01). At 60 min after exercise, the blood glucose level in slow-paced walking remained depressed.However, the blood glucose levels in fast-paced walking and jogging were elevated over the control, particularly, that in jogging was significantly higher (p<0.05). The foot bath and Sudoku resulted in no significant change compared with the control. A single bout of exercise after meal ingestion lowered blood glucose at the end of exercise. However, intense exercise induced a reactive elevation in blood glucose following the temporary reduction. Additionally, muscle contraction was necessary for blood glucose to be lowered. These results suggested that an exercise prescription such as 20-30 min of slow-paced walking without any change in heart rate at 30 min after meal ingestion was effective for the reduction of the blood glucose elevation after meal ingestion.(accepted. Nov. 30, 2009)