Flexion and Extension In Compound Movements
So far, we have mainly talked about flexion and extension in relation to single-joint movements. However, things become more complex when we look at compound exercises that involve two or more joints.
For instance, let’s consider the traditional barbell back squat. During squats, you bend at the hips, knees, and ankles – all three joints undergo some degree of flexion and extension.
Furthermore, individual body proportions, bar placement, and stance width can impact joint angles during the squat exercise. Although we can’t alter our body proportions, we can modify the exercise to achieve our desired training outcome.
To illustrate, a narrow stance squat generally increases knee flexion while reducing hip flexion, resulting in greater quad activation during the concentric phase. Conversely, a wide stance results in more hip and glute activation.