In this video, Phil Blackmar goes through a helpful stretch that will strengthen your hamstrings and increase your flexibility, which will eventually lead to an improved golf swing. Regularly doing the stretch before playing will not only warm you up for the game but it will also improve your overall flexibility. According to Blackmar, flexibility is an inhibiting factor for most golfers that attend his golf schools, since a lack of flexibility causes tension in the swing. He demonstrates an easy stretch for the hamstrings that does not strain the back. This simple exercise will eventually create more mobility and flexibility in the hamstrings for less tentativeness in the shot, leading to better end results.