Slight thread hijack, but I don’t understand why squats are still such a standard part of youth workouts. There are soooo many other good exercises for leg strength and explosiveness that don’t risk strain on lumbar vertebrae (box jumps, jump rope, hill sprints, stadium steps, stair climber, tire pulls, leg extensions, etc). And most of those provide extra cardio benefit as well. And squats require a bulky and relatively expensive set up as well. I’ve been working out regularly for 27-28 years now, and I’m not a stout guy but I’m at least as fast as I was in high school, and I haven’t touched a squat bar since then.