Overhead support systems differentially affect gait analysis of overground and treadmill walking

IF 2.2 3区 医学 Q3 NEUROSCIENCES
Thomas E. Augenstein , Shekoofe Saadat , Amiya C. Gupta , Danny Shin , Olugbenga P. Adeeko , Edward P. Washabaugh , Chandramouli Krishnan
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Abstract

Background

Overhead support or catch systems are frequently used in gait studies involving clinical populations to ensure participant safety. These systems remain slack when the participant is upright and therefore are assumed to not interfere with gait biomechanics. However, these systems follow participant’s transverse motion during walking via rail systems, which could produce additional inertial and frictional forces that affect gait biomechanics.

Objective

Quantify the influence of overhead support systems on gait biomechanics during treadmill and overground walking.

Methods

We recruited fifteen uninjured adults to perform treadmill and overground walking. In each of these walking conditions, we varied each participant’s walking speed (80, 100, and 120 % of preferred speed) and attachment to an overhead support system. We measured the participants’ joint angles, moments and ground reaction forces using a three-dimensional motion capture system and an instrumented treadmill built into an overground walkway. For overground and treadmill walking, we examined changes in each biomechanical variable across speed and harness conditions using one-dimensional statistical parametric mapping (spm1d).

Results

During overground walking, the overhead support system altered ground reaction forces, joint kinematics, and moments, and these effects became more pronounced with increased speed. During treadmill walking, we found very few changes in gait biomechanics resulting from the harness.

Conclusions

These results caution the use of experimental paradigms involving overground walking when an overhead support is required, although these results may be less pronounced in clinical populations with slower walking speeds. Overhead support systems can be used during treadmill walking without affecting biomechanical measurements.
架空支撑系统对地面和跑步机行走步态分析的影响不同
背景:在涉及临床人群的步态研究中,经常使用头顶支撑或捕捉系统来确保参与者的安全。当参与者直立时,这些系统保持松弛,因此假定不会干扰步态生物力学。然而,这些系统通过轨道系统跟踪参与者在行走过程中的横向运动,这可能会产生额外的惯性和摩擦力,从而影响步态生物力学。目的量化架空支撑系统对跑步机和地上行走步态生物力学的影响。方法招募15名未受伤的成年人进行跑步机和地上步行。在每一种步行条件下,我们改变了每个参与者的步行速度(80,100和1200 %的首选速度)和头顶支撑系统的附着。我们使用三维动作捕捉系统和安装在地上走道上的仪器跑步机来测量参与者的关节角度、力矩和地面反作用力。对于地上和跑步机行走,我们使用一维统计参数映射(spm1d)检查了每个生物力学变量在速度和线束条件下的变化。结果在地上行走时,架空支撑系统改变了地面反作用力、关节运动学和力矩,并且随着速度的增加,这些影响变得更加明显。在跑步机上行走时,我们发现绑带对步态生物力学的影响很小。这些结果提醒我们在需要头顶支撑的情况下使用涉及地上行走的实验范式,尽管这些结果可能在步行速度较慢的临床人群中不那么明显。在跑步机上行走时,可以使用头顶支撑系统,而不会影响生物力学测量。
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来源期刊
Gait & posture
Gait & posture 医学-神经科学
CiteScore
4.70
自引率
12.50%
发文量
616
审稿时长
6 months
期刊介绍: Gait & Posture is a vehicle for the publication of up-to-date basic and clinical research on all aspects of locomotion and balance. The topics covered include: Techniques for the measurement of gait and posture, and the standardization of results presentation; Studies of normal and pathological gait; Treatment of gait and postural abnormalities; Biomechanical and theoretical approaches to gait and posture; Mathematical models of joint and muscle mechanics; Neurological and musculoskeletal function in gait and posture; The evolution of upright posture and bipedal locomotion; Adaptations of carrying loads, walking on uneven surfaces, climbing stairs etc; spinal biomechanics only if they are directly related to gait and/or posture and are of general interest to our readers; The effect of aging and development on gait and posture; Psychological and cultural aspects of gait; Patient education.
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