The shoulder joint is an extremely unstable joint in the human body and bearing a load overhead in a close grip position is not the safest position. (onnit.com)
Creating unstable joints, because the body is too worn down, can lead to a future of severe arthritis and joint pain. (MomsTeam.com)
The American College of Sports Medicine warns against exercise that includes vigorous, highly repetitive exercise with unstable joints (think jogging with bad knees) as well as overstretching and hypermobility — the more mobile a joint, the less stable it is. (weightlosstriumph.com)