Biyumikānīk-i varzishī (May 2024)
Comparison of the Three-Dimensional Mechanical Power of Dominant Lower Limb Joints during Walking
Abstract
Objective Many studies have investigated the effect of mechanical power on the symmetry and asymmetry of the lower limbs and have discussed the differences in the values of this parameter between the two limbs. Additionally, some studies have investigated and analyzed the types of mechanical power (propulsion and control) in joint movements. However, no study has yet examined and compared the muscle mechanical power among different joints of each limb, particularly the dominant leg. Therefore, the present study aimed to compare the three-dimensional mechanical power of the dominant lower limb during walking. Methods Thirty female subjects were asked to walk at their chosen speed and barefoot along the path of the motion analyzer cameras and on the force plate so that the three-dimensional mechanical power of each lower limb joint could be recorded using the obtained data. One-way analysis of variance (ANOVA) and Bonferroni's post hoc test were used to compare the values of mechanical muscle power variables at a significance level of P≤0.05. Results Among the peaks of mechanical power of the dominant lower limb, the highest peak belonged to A2S, and the lowest belonged to K2T. Additionally, the most significant difference was observed between the average of some parameters such as H1S and other peaks, while the lowest average difference was observed between the averages of H2F and H1T and other mechanical power peaks. Conclusion Therefore, it can be concluded that there is a relationship between the peaks of mechanical power of the hip, knee, and ankle joints of the dominant lower limb. Among these peaks, the second peak of the ankle has the highest mechanical power, while the second peak of the knee has the lowest mechanical power.
