nope! almost never! my PT wanted me to strengthen my glutes to help with back pain, and i did leg stuff when recovering from knee surgeries (and should probably still do it for my right leg), and i do leg workouts that are aerial specific (single knee hangs, heel hang) and handstand-specific (active straddle, leg lifts for L-sits) but not squats, jumps, etc. i'm really only interested in getting stronger if it benefits handstands or trapeze.