Hamstrings As with any muscle group, before performing hamstring exercises, warm up. Dynamic stretching is a fantastic way to warm up and prepare the muscles. I hate to say especially with hamstrings, but yes, especially with hamstrings. Because low back and hamstrings are a mark for your flexibility, it is important to stay limber and not lose mobility in these areas. If you have always have tight hams, you probably will develop low back discomfort or tightness at some point or experience decreased flexibility. Sit down on the floor and reach to your toes with legs out straight in front of you. How did you do? You can improve this with daily dynamic and static stretching. Once you have worked out, take 5-7 minutes to stretch. See some videos here.