Time requirement for young and elderly women to move into a position for breaking a fall with outstretched hands.
Time requirement for young and elderly women to move into a position for breaking a fall with outstretched hands.
复制标题
年轻和老年妇女移动到伸出双手以防止跌倒的位置所需的时间。
DOI：
10.1093/gerona/60.12.1553
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Maurer,JessicaD
中科院分区：
文献类型：
--
作者：
Robinovitch,StephenN;Normandin,SarahC;Stotz,Paula;Maurer,JessicaD
背景：跌倒时髋部骨折的风险可以通过先用伸出的手接触地面来降低。然而，尚不清楚年轻人和老年人将手移动到保护位置所需的时间是否超过了典型跌倒时可用的时间。方法：我们测试了年轻女性(n=30；年龄18-35岁)和老年女性(n=30；70-88岁)在将手移动到保护位置以防止跌倒所需时间上的差异。参与者面对或侧向肩高的目标站着(分别模拟向前和侧向坠落)，在听到GO听觉提示后，他们被指示尽快联系这些目标。总接触时间分为反应时间和移动时间。结果：无论是向前试验(530±60vs 615±88ms；p<；.001)还是侧向试验(658±80vs 799±145ms；p<；.001)，年轻女性接触靶点的速度都快于老年女性。这一差异是由于年轻参与者的运动时间更快。两组的反应时间没有差异。结论：以前的研究表明，在实际从站立状态跌倒时，手腕和骨盆接触的时间分别为680±116和715±160毫秒。将这些值与我们的结果进行比较表明，典型的老年女性应该能够足够快地移动她的手，以打破向前跌倒，而不是横向跌倒。
Background.Risk for hip fracture during a fall is reduced by contacting the ground first with the outstretched hands. However, it is unclear whether the time required for young and elderly individuals to move the hands into a protective position exceeds that available during a typical fall.Methods.We tested whether young (n= 30; aged 18–35 years) and elderly women (n= 30; aged 70–88 years) differed in the time required to move their hands into a protective position for breaking a fall. Participants stood either facing or sideways to shoulder-height targets (simulating forward and sideways falls, respectively), which they were instructed to contact as quickly as possible after hearing an aural go cue. Total contact time was partitioned into reaction time and movement time.Results.Young women contacted the targets faster than elderly women in both forward (530 ± 60 vs 615 ± 88 ms;p<.001) and sideways trials (658 ± 80 vs 799 ± 145 ms;p<.001). This difference was due to faster movement times for young participants. There was no difference between groups in reaction time.Conclusions.Previous studies have shown that during actual falls from standing, wrist and pelvis contact occur at 680 ± 116 and 715 ± 160 ms, respectively. Comparing these values to our results suggests that the typical elderly woman should be able to move her hands quickly enough to break a forward fall, but not a sideways fall.