Physical Therapy Assistant Practice Exam

Which phase of the gait cycle makes up approximately 60 percent?

1. Stance phase

2. Swing phase

3. Initial contact phase

4. Terminal stance phase

The correct answer is: Stance phase

The stance phase comprises about 60 percent of the gait cycle and is fundamental to understanding human locomotion. This phase is characterized by the time when one foot is in contact with the ground, providing support for the body’s weight. It is further divided into several components: initial contact, loading response, mid-stance, terminal stance, and pre-swing. During the stance phase, the body is stable and capable of transferring weight from one leg to the other, which is critical for maintaining balance and efficient movement. This phase is crucial for propulsion and preparing for the next swing, thereby allowing for a smooth and coordinated gait. The swing phase, on the other hand, makes up the remaining 40 percent of the gait cycle and involves the leg moving forward to prepare for the next initial contact. While it's an essential aspect of walking, it does not dominate the cycle as the stance phase does. The initial contact and terminal stance phases are specific portions of the stance phase, thus they cannot encompass the entire phase's contribution to the gait cycle duration.