My question is, For my lower body days, I usually cycle between back squats, deadlifts, box squats, and front squats. Could I still progress with just these 4 lifts? I also wanted to do half squats, and was thinking about Rack Pulls also. I'm training to jump higher and run faster, so I don't know how much I really need to have variety in my exercises, but of course, I could be wrong. We don't have different bars for squats or a trap bar for deadlifts. What do you guys think? I appreciate the help.