Band stomps.
Original Link: http://www.t-nation.com/free_online_article/sports_body_training_performance/the_painful_seven
This is a common exercise at Westside Barbell Club, which is known for developing inhumane squatting strength via hamstring strengthening. This exercise is a great way to finish off the hamstring muscles after an intense workout. It’s also a fantastic drill to increase running speed.