As each day went on,i found that my calves were getting pumped a lot,and they definitely improved.Hamstrings as well improved and my goal was to get my legs back to where they were 20 years ago,and within 6 weeks they were well on the way.Then i got a lower back injury and had a couple of weeks off,i recently made myself a hip belt squat machine to take the stress off the lower back and plan on using this for high reps.