I'm not sure how it detects how hard a punch is, but I suspect form (or the closest approximation it can detect) is a significant factor. But honestly, it's no

I'm not sure how it detects how hard a punch is, but I suspect form (or the closest approximation it can detect) is a significant factor. But honestly, it's not real boxing it's a boxing themed cardio exercise. At a purported 10-15 calories a minute it seems like a pretty good cardio workout as well.