Preventing Strains & Sprains Lifting, pushing, and overreaching are common causes of strains and sprains. Any job that requires you to sit or stand bent in an awkward position for long periods of time can cause excess stress and strain on muscles. Most strains and sprains affect the back, arms, and shoulders. However, there are some very simple things you can do to prevent or minimize body strains and sprains. Many strains and sprains occur because of poor material handling. Workers lift things that weigh too much or they lift incorrectly. Lift correctly by bending your knees, not your back. Carry loads...