抄録
We developed an endurance exercise training (ET) regimen by accelerometry to increase physical fitness for older people in the field. Three hundred older people aged ∼65 yr were divided into 3 groups (n= 100, each) according to ET regimens for 6 months: no-ET (C,), constant moderate velocity of walking (CMW), & low/ high velocity of walking (LHW). In CMW, subjects were oriented to walk at 40% of their maximal velocity (Vmax), for 60 min, above 5 days a wk, where steps was measured with a pedometer. In LHW, subjects were oriented to repeat10 sets of 3-min walk at 30% Vmax followed by 3-min walk at 70% Vmax, above 5 days a wk, where energy expenditure was monitored by accelerometry. Before & after ET, maximal isometric knee extension force (Fmax) was measured with Biodex, and peak aerobic power (VO2, peak) with cycle-ergometer. The daily steps and energy expenditure were electrically transported every 2 wks from terminals to a central computer through IT network. The number of subjects to accomplish the program was 10 in male (M) & 44 in female (F) for CMW, and 13 in M & 31 in F for LHW. Similarly, the number in C to keep sedentary life and receive the physical fitness tests was 5 in M & 39 in F. After ET, VO2, peak and Fmax increased by 8.6% (P<0.05) & 12.2% (P<0.01), respectively, in LHW, while remained unchanged in other groups (P>0.34). Thus, the low / high velocity of walking increases physical fitness in older people, which can be done by accelerometry & IT network. [Jpn J Physiol 55 Suppl:S224 (2005)]
