Which of the following is a common technique error associated with the barbell back squat?

Allowing the knees to adduct during the concentric movement of the barbell back squat is indeed a common technique error. When performing a squat, proper knee alignment is crucial for maintaining joint health and ensuring that the movement is effective. Ideally, during the squat, the knees should track over the toes, maintaining a neutral position throughout the movement. If the knees adduct, or move inward, it can compromise the stability of the squat, increase the risk of injury, and reduce the effectiveness of the exercise. This inward movement of the knees can place undue stress on the ligaments within the knee joint, potentially leading to injuries such as patellar tendinopathy or ligament strains.

In contrast, maintaining an upright chest provides a more stable posture and helps in engaging the appropriate muscle groups effectively throughout the squat. Lowering the hips below the knees, while often debated, is not inherently an error as long as it is done with proper form and without compromising knee health or back integrity. Using a wider grip on the bar may affect comfort and stability for some, but it is not necessarily a technique error and can vary based on individual preference and body structure. Each of these factors plays into the overall execution of the squat, but the specific issue of knee ad