It all depends on the muscle control behind everything. It really helps make your lines prettier and if your en pointe it's almost a blessing
i dont know but squats and lunges do! so try them! :)
Quads and hamstrings
No, its not bad for you, although it may cause irritation, razer burn, or a rash.
yes it is because your back is folding down wards like a leaver and its bad for your knees hips ankles and legs look it up i am a 8th grader who knows facts