WHEN STIFF SHOULD NEVER BE STIFF

100. WHEN STIFF SHOULD NEVER BE STIFF Although they are called stiff-leg deadlifts, you should not do them with the legs completely locked out straight. Always keep the knees slightly bent. The same holds true for every other exercise that calls for a "straight" leg (leg raises for example). Always keep the knees slightly bent to reduce the pressure on the lower back.