Knee Flexion  
 Strengthens muscles in back of thigh. Use ankle weights, if you are ready.  
 - Stand straight holding onto a table or chair for balance.  
 - Slowly bend knee as far as possible. Don't move your upper leg at all; bend your knee only.  
 - Hold position for 1 second.  
 - Slowly lower foot all the way back down. Pause.  
 - Repeat with other leg.  
 - Alternate legs until you have done 8 to 15 repetitions with each leg.  
 - Rest; then do another set of 8 to 15 alternating repetitions.