Abstract
Moderate-intensity physical activity is recommended to promote health, and augment peak oxygen transport, thus reducing the risk of chronic disease, and delaying functional loss in the elderly. The optimal method of prescribing the recommended intensity of effort [approximately 50% of oxygen intake reserve (V̇O2reserve) or heart rate reserve (HRreserve)] remains unclear for this age group. Our aim was to develop a new field-method of prescribing exercise for the elderly, based on walking velocity measured over a 5-m distance. Walking velocities were calculated from the time taken to move from the 3-m to the 8-m mark on an 11-m, straight, flat walkway. Interrelationships of preferred and maximal walking velocities with traditional laboratory measurements [peak isometric knee-extension strength and maximal oxygen intake (V̇O2max)] were examined in 10 healthy male and 13 healthy female volunteers, aged 65–74 years. Percentages of oxygen intake reserve (%V̇O2reserve) and heart rate reserve (%HRreserve) were also determined when walking at 30–70% of maximal velocity. Preferred and maximal walking velocities were significantly correlated (r>0.60; P<0.05), the former corresponding to an average of 53–54% of the latter in both men and women. Maximal walking velocity was significantly correlated with both peak knee-extension torque (r>0.90; P<0.05) and V̇O2max (r>0.80; P<0.05). As a result, the %V̇O2reserve and %HRreserve showed a regular and linear relationship to various submaximal walking velocities. For both men and women, 40–60% of the maximal walking velocity corresponded to about 30–50% of V̇O2reserve and HRreserve. Approximately 60% of the maximal walking velocity (or 110–115% of the preferred walking velocity) represents an appropriate intensity of moderate exercise for the typical elderly person. Our preliminary data suggest that a prescription based on walking velocity over the 5-m distance allows the healthy elderly to exercise simply, safely, and effectively.
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Acknowledgements
This research was undertaken as part of the longitudinal, interdisciplinary study on physical activity and health of the elderly in Nakanojo, Gunma, Japan (the Nakanojo Study). The study was supported in part by grants from the Meiji Life Foundation of Health and Welfare, the Nakatomi Foundation, and the Japan Society for the Promotion of Science. The authors gratefully acknowledge the expert technical assistance of the research and nursing staffs of the Tokyo Metropolitan Institute of Gerontology and the Tokyo Metropolitan Health Promotion Center. We would also like to thank the subjects whose participation made this investigation possible.
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Aoyagi, Y., Togo, F., Matsuki, S. et al. Walking velocity measured over 5 m as a basis of exercise prescription for the elderly: preliminary data from the Nakanojo Study. Eur J Appl Physiol 93, 217–223 (2004). https://doi.org/10.1007/s00421-004-1202-6
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DOI: https://doi.org/10.1007/s00421-004-1202-6