Dont lock out

Keeping your elbows and knees slightly soft, even during full extension, is in your interest not only in terms of joint health, but also in making your workout more effective.
Not locking out when lifting weights will prevent joint deterioration and reduce your chances of joint related niggles and injuries, explains personal trainer Dave Fletcher. Keeping your joints soft also calls for muscle recruitment throughout the entire move, as it doesn’t allow them to catch a break at the top of the motion. More work equals better results, right?