老年妇女在水下踏车逆水行走时的步态模式和下肢肌肉活动。

IF 3.3 4区 医学 Q1 PHYSIOLOGY
Tomoki Shono, Kenji Masumoto, Kazutaka Fujishima, Noboru Hotta, Tetsuro Ogaki, Takahiro Adachi
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引用次数: 44

摘要

本研究旨在确定老年妇女在水下跑步机逆水行走时的步态模式和下肢肌肉活动特征。8名女性受试者(61.4±3.9岁)在不同的运动强度和速度下进行水下和陆地跑步机行走。在使用Flowmill(在水槽底部有一个跑步机)进行水下行走(剑状突的水位)时,同步皮带和水流速度被设置为20,30和4 m.min(-1)。陆地行走速度设置为40,60和80m .min(-1)。在两种步行运动中都测量了摄氧量和心率。采用二维运动分析方法,计算了摆动阶段膝关节的最大、最小转角以及膝关节伸屈的平均角速度。采用双极表面电极记录胫骨前肌(TA)、腓肠肌内侧肌(MG)、股内侧肌(VM)、股直肌(RF)和股二头肌(BF)五块肌肉的肌电图。在相同的运动强度水平下,节奏几乎是陆地上的一半。步长没有显著差异,因为速度减半。与陆地行走相比,膝关节最大最小角度明显减小,膝关节伸展平均角速度明显降低。在挥拍阶段,膝关节伸展受到水阻力的限制。而TA、VM和BF的肌肉活动水平与陆地行走时基本相同,MG和RF的肌肉活动水平较低。在相同速度下,运动强度显著高于陆地步行,节奏显著低于陆地步行,步长显著大于陆地步行。膝关节最大最小角度明显减小,膝关节屈曲的平均角速度明显增大。与陆地行走相比,TA、VM和BF的肌肉活动水平显著增加,而MG和RF的肌肉活动水平无显著差异。根据我们的研究结果,在相同的运动强度水平和相同的速度下,浮力、较低的节奏和移动的地板似乎会影响MG和RF的肌肉活动水平。这些结果有望成为水下步行运动处方的基础数据选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Gait patterns and muscle activity in the lower extremities of elderly women during underwater treadmill walking against water flow.

This study sought to determine the characteristics of gait patterns and muscle activity in the lower extremities of elderly women during underwater treadmill walking against water flow. Eight female subjects (61.4+/-3.9 y) performed underwater and land treadmill walking at varying exercise intensities and velocities. During underwater walking (water level at the xiphoid process) using the Flowmill, which has a treadmill at the base of a water flume, the simultaneous belt and water flow velocities were set to 20, 30 and 4 m.min(-1). Land walking velocities were set to 40, 60 and 80 m.min(-1). Oxygen uptake and heart rate were measured during both walking exercises. Maximum and minimum knee joint angles, and mean angular velocities of knee extension and knee flexion in the swing phase were calculated using two-dimensional motion analysis. Electromyograms were recorded using bipolar surface electrodes for five muscles: the tibialis anterior (TA), medial gastrocnemius (MG), vastus medialis (VM), rectus femoris (RF) and biceps femoris (BF). At the same exercise intensity level, cadence was almost half that on land. Step length did not differ significantly because velocity was halved. Compared to land walking, the maximum and minimum knee joint angles were significantly smaller and the mean angular velocity of knee extension was significantly lower. Knee extension in the swing phase was limited by water resistance. While the muscle activity levels of TA, VM and BF were almost the same as during land walking, those of MG and RF were lower. At the same velocity, exercise intensity was significantly higher than during land walking, cadence was significantly lower, and step length significantly larger. The knee joint showed significantly smaller maximum and minimum angles, and the mean angular velocity of knee flexion was significantly larger. The muscle activity levels of TA, VM, and BF increased significantly in comparison with land walking, although those of MG and RF did not significantly differ. Given our findings, it appears that buoyancy, lower cadence, and a moving floor influenced the muscle activity level of MG and RF at the same exercise intensity level and at the same velocity. These results show promise of becoming the basic data of choice for underwater walking exercise prescription.

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来源期刊
自引率
6.50%
发文量
39
期刊介绍: Journal of Physiological Anthropology (JPA) is an open access, peer-reviewed journal that publishes research on the physiological functions of modern mankind, with an emphasis on the physical and bio-cultural effects on human adaptability to the current environment. The objective of JPA is to evaluate physiological adaptations to modern living environments, and to publish research from different scientific fields concerned with environmental impact on human life. Topic areas include, but are not limited to: environmental physiology bio-cultural environment living environment epigenetic adaptation development and growth age and sex differences nutrition and morphology physical fitness and health Journal of Physiological Anthropology is the official journal of the Japan Society of Physiological Anthropology.
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