Stronger abs are great. Doing a million crunches is not. Right?
That's why BuzzFeed Life worked with a personal trainer to create a no-equipment workout you can do in just 15 minutes.
The workout was designed by certified strength and conditioning specialist Albert Matheny, of ProMix Nutrition and Soho Strength Lab, so that you can get in a solid, core-burning workout whether you're at home or at the gym.
All you need is a timer and some floor room to perform the moves. You'll do each move for 30 seconds, then rest 30 seconds and repeat the whole circuit five more times. Alright, time to get to it!