No. You need to be jumping. That is the key. 6 months and pretty strenuous. Timed jump rope,sometimes 3-400. Sometimes 80 24 inch box jumps. Stacked on top of lifts where you jump to get the weight up into a clean or jerk position. I went from being scared of cramping every time I exercised to be able to play tennis in 100 degree weather for 2 hours with no cramps. Not saying ill never cramp again, but this has definitely made a dramatic difference.