抄録
Six Elderly males (EM; average age 69.0yrs) who have no abnormal sign of cardiovascular function and 6 healthy young adult males (YM; average age 22.5yrs) performed 10 min of self-pace snow shoveling for the purpose of eleciting the characteristics of the physiogical responses to snow shoveling with aging. RPE was roughly the same level (Mean±SE, YM: 13.0±0.5 vs EM: 12.5±0.3) between YM and EM. In spite of the fact that average shoveling performance was slightly higher in EM than YM, VO2 in YM was significantly higher than EM during exercise both in terms of the absolute value (YM: 1.29±0.10L/min vs EM: 0.86±0.10L/min, p<0.001) and relative value (YM: 18.5±1.5ml/kg/min vs EM: 15.4±1.7ml/kg/min, p<0.01). Average heart rate values at rest (YM: 70±4bpm vs EM: 74±2bpm), during exercise (YM: 110±6bpm vs EM: 115±8bpm) and 4th minute in recovery period (YM: 79±6bpm vs EM: 86±7bpm) were higher in EM than YE, although none of these periods revealed significant difference. There was no difference in the mean values at rest both in systolic BP and diastolic BP between the two groups. Significant differences were found in systolic BP during 4th minute in recovery period (YM: 132±5mmHg vs EM: 163±9mmHg, p<0.05) and diastolic BP during exercise (YM: 70±3mmHg vs EM: 82 f 3mmHg, p<0.05) and recovery period (YM: 71±4mmHg vs EG: 83±3mmHg, p<0.05). These results suggests that the blood pressure responses including recovery period characterize the demands on the cardiovascular function for the aged people engaging in snow shoveling.
