I am trying to design a program I can supplement my training with to help with explosiveness, power and speed. I plan on doing this program 3-4 times a week, 20-30 minutes per session. These are the ones I was considering. Please give me your favorites and thoughts on a program for me.

1. heavy squats
2. box jumps
3. sledgehammer swings
4. russian twists
5. weighted pylo pushups

I would do the same exercises each session. 3 sets per exercise.

thanks in advance.