B Bob New member May 19, 2009 #1 I heard you should suck in your stomach when your doing crunches, sit-ups, or exercises like that. I was wondering, should you suck in your stomach while stationary biking as well?
I heard you should suck in your stomach when your doing crunches, sit-ups, or exercises like that. I was wondering, should you suck in your stomach while stationary biking as well?
