Healthy hamstrings are so important for hip mobility, knee support, and lower body power output. However, it is so easy to get tight, junky, sore hammies when we are training or surfing everyday. This technique works super well to really attack all the different areas of your hamstrings. With a lacrosse ball, start out right under your butt cheek, apply some weight(with actual weight or just body weight), and go through a range of motion extending that leg out. Do a left and a right side to each spot at a given distance down your hammie. For example, inch or 2 below left butt cheek a little to the right, then inch or 2 below left butt cheek a lil to the left. Then go down 6inches below left butt cheek a lil to the right side and a then a lil to the left side. And so on until you're a couple inches above the back of the knee. Spend about 45-90sec on each spot depending on how much tightness or soreness you feel. Warning: it can be pretty painful so maybe start with body weight or a lighter weight.