Boxing can be tiring, especially when you're trying to beat the crap out of your friends. If you really get into it, the other games can tire you out to, but don't need you to swing full speed to get the same effect.
I went into the early stage of sweating from tennis, I intentionally got into it and moved my feet just like the players would have to, and played for awhile.
And FPS games like call of duty 3 for example are very much "Sit still games". They're just as fun. What I'm syaing is it's the sports titles that actually move blood.