Arampatzis Adamantios, Nikolaidou Maria-Elissavet, Theodorakis Christos, Ghasemi Morteza, Mersmann Falk, Bohm Sebastian
Department of Training and Movement Sciences, Humboldt-Universität zu Berlin, Philippstr. 13, Haus 11, 10115, Berlin, Germany.
Berlin School of Movement Science, Berlin, Germany.
Ann Biomed Eng. 2025 Sep 8. doi: 10.1007/s10439-025-03835-7.
The functional interaction of regulatory mechanisms that manage total centre of mass (CoM) energy, frontal plane whole-body angular momentum and mediolateral margin of stability (MoS) during hole negotiation gait was investigated. Joint kinematics, leg posture, total CoM energy, frontal plane whole-body angular momentum, mediolateral MoS and muscle activation patterns of seven bilateral lower leg muscles were assessed in 18 participants. During hole negotiation, we found an increase in the peak-to-peak range of total CoM energy and frontal plane whole-body angular momentum during the preparation, hole and recovery steps, and a decrease in mediolateral MoS at touch-down during the preparation and hole steps compared to level walking, providing evidence of an increased challenge in stability control. Anticipatory adjustments in CoM trajectories, joint kinematics and muscle activation patterns regulated mechanisms that primarily supported the management of total CoM energy at the expense of whole-body angular momentum in the frontal plane. We identified an anticipatory foot placement strategy during the step in the hole that significantly reduced the moment arm of the vertical ground reaction force (p = 0.011, d = 0.81), thereby favouring the control of frontal plane whole-body angular momentum. Conversely, this foot placement strategy significantly reduced (p < 0.001, d = 1.05) the mediolateral MoS. The mutual influence between the regulatory mechanisms that control total CoM energy, frontal plane angular momentum and mediolateral MoS represent trade-offs rooted in the nature of the hole negotiation gait and demonstrate the challenge of moving on uneven terrain.
研究了在通过孔洞的步态中,管理总质心(CoM)能量、额状面全身角动量和稳定边际(MoS)的调节机制之间的功能相互作用。对18名参与者的关节运动学、腿部姿势、总CoM能量、额状面全身角动量、MoS以及七块双侧小腿肌肉的肌肉激活模式进行了评估。在通过孔洞的过程中,我们发现与平地行走相比,在准备、孔洞和恢复步骤中,总CoM能量和额状面全身角动量的峰峰值范围增加,并且在准备和孔洞步骤着地时MoS减小,这为稳定性控制面临更大挑战提供了证据。CoM轨迹、关节运动学和肌肉激活模式的预期调整调节了主要支持总CoM能量管理的机制,代价是额状面的全身角动量。我们确定了在孔洞步骤中的一种预期足部放置策略,该策略显著减小了垂直地面反作用力的力臂(p = 0.011,d = 0.81),从而有利于额状面全身角动量的控制。相反,这种足部放置策略显著减小了(p < 0.001,d = 1.05)MoS。控制总CoM能量、额状面角动量和MoS的调节机制之间的相互影响代表了源于通过孔洞步态本质的权衡,并证明了在不平坦地形上行走的挑战。