What is the difference between doing stomach crunches on the floor and doing them while lying on the bed?
I ask because it's obviously more comfortable to do them on the bed, but I was curious what the downfalls/benefits are considering it is such a soft surface.
Thanks!
I ask because it's obviously more comfortable to do them on the bed, but I was curious what the downfalls/benefits are considering it is such a soft surface.
Thanks!
