During the single-arm row, what excessive movement is commonly observed that should be corrected?

In the single-arm row exercise, excessive rotating is a common issue that can compromise form and potentially lead to injuries. Proper execution involves maintaining a stable torso and avoiding unnecessary rotation, which can happen if the lifter engages their upper body or torso improperly. This rotation not only reduces the effectiveness of the row but can also place undue stress on the shoulder girdle and lower back.

When performing a single-arm row, the core should be engaged to stabilize the body and prevent any lateral or rotational movement. Correcting excessive rotation helps ensure that the primary muscles being targeted – typically the latissimus dorsi, rhomboids, and other upper back muscles – are effectively engaged without placing excess strain on the spine or diminishing the exercise's effectiveness.

While the other movements like flexing, extending, or hyperextending can also occur, they are typically less impactful on the execution of the single-arm row compared to excessive rotation, which fundamentally alters how the exercise is performed and can lead to significant biomechanical issues.