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首页> 外文期刊>Gait & posture >Adult age differences in familiarization to treadmill walking within virtual environments.
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Adult age differences in familiarization to treadmill walking within virtual environments.

机译：成人对虚拟环境中跑步机的熟悉程度存在差异。

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We assessed age-related differences in adults in familiarization to treadmill walking within virtual environments (VE), and examined whether treadmill walking after familiarization resembles overground walking. Seventeen younger and 17 older adults walked at preferred speed on an overground walkway and afterwards walked at the same speed for 20 min on a treadmill coupled to a VE. A motion capture system was used to measure spatio-temporal gait parameters. On the treadmill, both younger and older adults initially displayed decreased step length and increased step width, cadence, and time in double support relative to overground walking. Except for time in double support, step characteristics approached overground walking-behavior with a negatively accelerated trend. After 15 min of treadmill walking, changes became minor corresponding to less than 1% deviations to individuals' overground walking. At the end of familiarization, average differences in step length, cadence, and double support relative to overground walking were reduced to less than 5 percent in both age groups. For step width, younger adults approximated overground walking after 20 min more closely than older adults, probably reflecting larger initial differences between treadmill and overground walking among older adults. We conclude (a) that 20 min of familiarization to treadmill walking in a VE are sufficient to reach stable walking patterns resembling those observed in overground walking, but that some differences between the two settings remain, especially in older adults; (b) that sufficient familiarization to the treadmill is needed to ascertain the validity and generalizability of comparisons between younger and older adults.
机译：我们评估了成年人在虚拟环境（VE）中对跑步机行走的熟悉程度与年龄相关的差异，并检查了熟悉后的跑步机行走是否类似于地面行走。 17名年轻人和17名老年人在地上人行道上以偏好的速度行走，然后在与VE相连的跑步机上以相同的速度行走20分钟。使用运动捕捉系统来测量时空步态参数。在跑步机上，相对于地面行走，无论是年轻人还是老年人，最初都表现出减小的步长，增加的步幅，节奏和时间。除了在双重支撑下的时间外，步态特征接近地面的步行行为，并具有负加速趋势。在跑步机上行走15分钟后，变化变得很小，相当于个人地面行走的偏差小于1％。在熟悉结束时，两个年龄段的步长，节奏和双支撑相对于地面行走的平均差异均降低到5％以下。对于步幅，年轻人在20分钟后比成年人更接近地面步行，这可能反映了老年人之间跑步机和地面步行之间的较大初始差异。我们得出的结论是：（a）对VE中的跑步机行走熟悉20分钟就足以达到类似于在地面行走中观察到的稳定行走模式，但是这两种设置之间仍然存在一些差异，尤其是在老年人中; （b）需要对跑步机有足够的熟悉度，以确定年轻人和老年人之间进行比较的有效性和普遍性。

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