The postural deviation during a lower body exercise, characterized by an increased angle of the torso relative to the vertical plane, compromises ideal biomechanics. This forward inclination, often observed during the descent and ascent phases of movements like the squat, results in a shift of the center of gravity. For example, an individual might exhibit this tendency if their chest noticeably drops toward the floor as they move downward.
Maintaining a more upright torso is critical for optimizing force production and minimizing the risk of injury. A more upright posture allows for better engagement of the posterior chain muscles, including the glutes and hamstrings, which are crucial for power generation. Historically, coaching cues and training methodologies have emphasized techniques that mitigate excessive forward displacement, leading to improved performance and reduced stress on the lumbar spine and knee joints.