>>352978435
That is true if you're only using your wrists, but you'll fuck them up that way anyway and they will hurt, especially with faster songs.
I do full arc swings and there are quick jumps to hit in faster songs, which utilize shoulder and arm muscles just as well. I also do around 150 squats per session (around 70-80 min)
I haven't really tried similar games (except synth riders but I didn't like it that much), so it's possible that there are more efficient workout games, BS works for me though