Lower extremity joint power and work during recovery following trip-induced perturbations

The Impact of Induced Acceleration Perturbations in Selected Phases of the Gait Cycle on Kinematic and Kinetic Parameters

“…These differences manifest as follows: When comparing the curves for the ankle joint angle with perturbation in the MS phase (Figure 6A) to the curve for gait without perturbation, three areas exhibit statistically significant differences: [0-9]%, %, and [81-92]% of the gait cycle. Similar to previous findings, differences are observed for additional joints but are confined to two clusters: % and [93-100]% of the gait cycle for the knee joint (Figure 6B) and [34][35][36][37][38][39][40][41][42][43][44][45][46]% and [51-60]% of the gait cycle for the hip joint (Figure 6C). Similar to the previous perturbation, the analysis of muscle torques provides different information.…”

“…A consistent significant alteration observed across all perturbations was the reduction in full knee extension, as evidenced by the knee joint angle curves (Figure 6B) and extreme values for the knee extension angle (Table 2). All this suggests a critical role of the knee joint in adapting to perturbations, a trend similarly noted by Shokouhi, et al [39], who examined adjustments in lower limb joint power and work in response to trip-induced perturbations. In contrast to Shokouhi et al's [39] trip-like perturbation, which involved rapidly decelerating the belt under the dominant foot, this study utilised accelerations.…”

“…All this suggests a critical role of the knee joint in adapting to perturbations, a trend similarly noted by Shokouhi, et al [39], who examined adjustments in lower limb joint power and work in response to trip-induced perturbations. In contrast to Shokouhi et al's [39] trip-like perturbation, which involved rapidly decelerating the belt under the dominant foot, this study utilised accelerations. Additionally, Błażkiewicz and Hadamus [4] assessed gait regularity during external perturbations caused by treadmill belt acceleration and deceleration across different phases of the gait cycle.…”