amirreza kiani

Walking is a complex activity that involves multiple parts of the body, including the lower limb, upper limb, trunk, head, and neck. Contrary to popular belief, walking is not solely related to the forward movement of the legs. Biomechanical analysis, especially in terms of mechanical power, is an essential aspect of gait studying. The study aims to explore how altering arm swing speed affects the 3D maximum mechanical power of the lower limb while walking.

In this study, 30 healthy women walked on a force plate path in front of cameras in three states of normal upper limb swing, fast upper limb swing, and slow upper limb swing. The calculation of muscle power in each lower limb joint and plane is based on the product of the joint moment and its angular velocity. The average mechanical power of the joints was compared using the repeated measurement test (P≤0.05).

The results showed that changing the swing speed of the arm has a significant effect on all absorption and production parameters related to the mechanical power of the lower limb joints.

In conclusion, any change in arm movement during walking can affect movement, balance, and gait biomechanics.

The present study aimed to determine the extent to which female athletes display asymmetrical or symmetry patterns in lower limb three-dimensional mechanical muscle power during gait. Thirty healthy female professional bodybuilders participated in his study. Their three-dimensional data of both lower extremities during walking was collected using a ten-camera Vicon motion capture system and two Kistler force plates. The peak mechanical muscle power of lower limbs in all three planes was calculated (P≤ 0.05). The results showed that except in the ankle joint, there were significant differences in third mechanical muscle power peaks of the knee and hip joints in sagittal plane (H3S, K3S), first and second mechanical muscle power peaks of knee joint in frontal plane (K1F, K2F), and second mechanical muscle power peak of hip joint in horizontal plane (H2T). In addition, the findings confirmed approximately 25% local asymmetry in the mechanical muscle power in the hip and knee joints between the right and left limbs.