15- Minute Ab Workout

Here's the situation. You have a lot going on today and time isn't on your side. You need to get in a good ab workout and get on with the rest of your day. If you can spare just 15 minutes, then this workout will help you get the job done.

This program is based on EMOM (Every Minute On the Minute) training. At the top of every minute, start your set. Once you finish, whatever is left of that minute is your rest time. The next minute is the start of your next set. You'll do five exercises and rotate through them for three complete sets of each within the quarter-hour.