Hamstrings exercises strengthen the hamstrings muscles at the back of the knee.
Lie on your tummy on a flat surface with the head supported.
Bend up the one knee to a count of five, and slowly lower it, and repeat on the other side. Use ankle weights if too easy.
Balancing hamstrings and quadriceps
Knee rehab programs should focus not only on regaining strength of the quads and hamstrings, but also on achieving a strength balance between them.