Loads of Lower Limb Joints during Bicycle Ride

Abstract: This work features a geometric and static analysis of the lower limb during bicycle ride. Basic dimensions are indicated, which are necessary for the description of movement geometry. The simplified flat model was adopted for the analysis. Using the transformation of Denavit-Hartenberg frames, vectors were developed for the position of the rotation axis of the joints in immovable frame. The inverse kinematics problem was solved. The course of displacement changes in the ankle joint was adopted as an angle function for crankset position, based on experimental research results, published in professional literature. The course was approximated with fifth grade polynomial. Joint displacements and loads were established. A sample calculation is presented, illustrating the subject computational algorithm.