Consider trying out Romanian Deadlifts. Hamstring curls are great for working the hamstrings, but they only utilize movement at a single joint. However, Romanian Deadlifts let you utilize an additional amount of weight, and they work through the entire hamstring muscle, rising into the glute-ham at the origin of the hamstring.

Always try to mix up your workouts when trying to build muscle mass. Every few weeks completely change your routine and throw your body off course. Your…