Résumé
The purpose of this study was to examine the effects of a six-month Square-Stepping Exercise (SSE) program on physical fitness and cognitive function in elderly and the effects of differences in cognitive function levels before the program on cognitive function. Twenty-four elderly (≧75 years old, mean age: 80.7±3.8 years) participated in the SSE program (once a week, 90 minutes/session, for six months). Grip strength, single leg balance with eyes open, chair stand, figure-8 walking test, and cognitive function (Five Cog) were measured before and after the program. Physical function did not improve during the SSE program. Significant memory and language improvements in Five Cog were observed. There was no significant interaction between the pre cognitive function level and the pre results. In conclusion, the six-month SSE program is an effective exercise for improving memory and language in cognitive function of elderly women and prevented physical function decline. However, there was no difference in the improvement due to the pre cognitive function level.
Résumé
<p><b>Introduction: </b>The purpose of this study was to investigate the effects that a group exercise activity managed by elderly volunteers would have on the physical function of older women after they participated in a formal exercise program taught by fitness experts.</p><p><b>Methods: </b>Subjects were 47 community-dwelling older women who had completed a 3-month exercise program led by expert instructors in Kasama City, Ibaraki. After completing this exercise program, 28 subjects continued to participate in a group exercise activity led by elderly volunteers for approximately 11 months. The remaining 19 subjects did not join the group activities after the formal program. In both the initial, expert-led exercise program and the subsequent, volunteer-led group activity, subjects mainly engaged in the square-stepping exercise, which is a novel exercise for improving lower extremity physical function. In order to assess participants' physical function, we conducted five physical performance tests at both the baseline and follow-up; the former is the last day of the exercise program and the latter is approximately a year after the baseline.</p><p><b>Results: </b>Two-way ANOVA demonstrated a significant interaction in the timed up and go test (P=0.003). The performance of subjects who had participated in the volunteer-managed group activity improved between the baseline and follow-up tests (P=0.007).</p><p><b>Conclusion: </b>Participating in a group exercise activity managed by elderly volunteers can improve mobility skills of older women who had previously completed a formal exercise program led by expert instructors.</p>
Résumé
The purpose of this study was to examine the effects of 9 weeks of resistance training, with and without static acceleration training (AT), on participants' lower-limb muscle strength, power, and physical function. Healthy participants (19 men and 28 women), aged 65-75 years, were assigned to a static AT group (AT, n = 31) or a non-AT control group (C, n = 16). The AT group and the C group trained three times/week for 9 weeks. The AT group performed unloaded static AT and low-intensity aerobic activity. The C group performed dynamic weight-bearing resistance training without whole-body vibration and the same aerobic activity as the AT group. We collected and analyzed data from 45 participants (AT = 30, C = 15) who completed pre- and post-tests. There was no significant Group × Time interaction on any measurements of lower-limb muscle strength, power, or physical function. Significant time effects were observed in the following tests:isokinetic knee extensor and flexor peak torque, 5-time sit-to-stand, usual gait speed, timed up and go, standing time from a long sitting position, and sit and reach. All of these 7 variables showed positive changes. These results suggest that static AT is a suitable training method having approximately the same efficiency as conventional, weight-bearing, dynamic resistance training for improving lower-limb muscle strength and power, mobility, and flexibility in community-dwelling Japanese older adults.