健常高齢者の運動耐容能および歩行の限界と安全範囲

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Few studies have examined walking ability in the healthy older people and their exercise tolerance as measured by an exercise test. The purpose of this study was to research healthy older subject's exercise tolerance, limitation of walking capacity and its safety range by comparing walking speed, oxygen intake and cardiac reserve. Forty-three normal older subjects performed an incremental exercise test of walking on treadmill. These subjects were classified in three groups. The normal group (Normal-G) was those subjects who finished the test by achieving the target heart rate 85 % heart rate reserve. Blood pressure group (BP-G) was those subjects who discontinued the test at the endpoints where an excessive rise in blood pressure occurred systolic BP>23OmmHg and/or diastolic BP>13OmmHg, and the ECG group (ECG-G), whose endpoint of the test was determined by abnormal findings in electrocardiogram. These results suggest that in the older people who have discontinued exercise because of rising blood pressure or abnormal electrocardiogram, exercise tolerance in healthy older peoples may already be limited to the level, that is, walking speed: 6Om/min, V0_2: 15∼17ml/kg/min, 60%preVO_2max, HR: 70%HRreserve. Therefore, the safety range of walking in general older people will become intensities less than these levels. In the BP-G resting SBP was significantly higher than that of the other two groups, and blood triglyceride and total cholesterol concentrations also tended to be higher in the BP-G. In the ECG-G blood sugar and %Fat were significantly higher than that of the other two groups. These results indicate that older subjects with abnormal blood pressure or electrocardiogram in an exercise test may have the risk factors of increased body fat, blood adipose tissuse or blood sugar.
日本運動生理学会の論文
1997-08-30

健常高齢者の運動耐容能および歩行の限界と安全範囲

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