Quote Originally Posted by wormwood View Post
Defenitely. If you are performing sprints imo it can even add to strength and size a bit. No other cardio can do that. I'm gonna start doing HIIT again with sprinting. I quit doing it because I fell in love with distance running, but my legs where much thicker and stronger when I was doing HIIT only for cardio.
Sprints are a great abdominal workout!

Quote Originally Posted by B1gDaddy View Post
Youtube actually has a lot of good ab videos.
They also contain a lot of bad ones lol.