Which condition could lead to a long prosthetic step in a TF user?

A long prosthetic step in a transfemoral (TF) user can indeed be influenced by insufficient hip flexion. When there is not enough hip flexion at the socket level, it limits the user's ability to properly advance the prosthetic limb during the swing phase of gait. In normal gait mechanics, adequate hip flexion is necessary to bring the prosthetic foot forward to ensure a natural and efficient stride. Without sufficient hip flexion, the user may unconsciously compensate by extending their hip or adopting a more elongated stride, which can lead to a longer step.

Evaluating the other conditions provides additional context. Anterior socket position could potentially alter the user's weight distribution and affect their gait rhythm, but a long step is more directly related to how the hip functions during movement. Weak extension aid and improper knee alignment might contribute to gait deviations, but they would typically not be the primary reason for prolonged steps in the context of hip positioning. Understanding the biomechanics involved in walking with a prosthesis is crucial for optimizing the fit and function of the device, ultimately enhancing the user's gait pattern.