Hamstring injuries can be debilitating. They range from just a minor strain to a large tear that requires surgery. Detailed medical diagnosis is always recommended to be sure no steps are skipped. The time spent doing ICE, stretching, and/or physical therapy is crucial for rehab.  Awareness and attention both to the injury and rehab will determine long term successful recovery. 

The way you use your hamstrings in day-to-day life requires attention to the condition and use of the foot, knee and its relationship with the ankle and then the flexibility and strength of the hip and glute muscles. This is for both legs, not just the strained one. The point is, it is never as simple as rehabbing and calming a hamstring muscle itself. 

Regardless of the injury or pain we will always start with “what is the condition of your foundation?” Your feet.If they are not strong, straight forward, and level, the joints and muscles going up the legs cannot move efficiently. This will leave the muscles that are our workhorses, such as a hamstring, very vulnerable. 

Your real life has stairs and different terrains, that you ask your body to walk or even run. If the strength, flexibility or mechanics at this level is compromised, the rehabilitation of a hamstring muscle will be short-lived.