The influence of more strenuous activities on the task requirements. Increasing the gait speed (3 km/h vs. 5 km/h) causes an increase in the task requirements. There is an increase in net plantarflexion moment (p < 0.01), dorsiflexion moment (p < 0.05), knee extension moment (p < 0.05), knee flexion moment (p < 0.01), hip flexion moment (p < 0.01) and hip extension moment (p < 0.01). Increasing the chair height from 100% knee height to 120% knee height decreases the net knee extension and hip extension moment (p < 0.05, p < 0.05). The use of hand support causes a decrease in peak hip extension moment (p < 0.05). The peak joint moments were compared using a Wilcoxon sign rank test. The significant differences between the conditions are marked with a red square.