When you’re exhausted mentally, such as after a trying workday, you can stop your brain’s comfort-seeking hunger urges simply by doing a 15-minute high-intensity workout, University of Alabama at Birmingham researchers say.

So, HIIT it! Try these killer 15-minute routines:

The 15-Minute Leg Workout for Monster Quads >>>

The 15-Minute Full-Body Dumbbell Workout >>>

The 15-Minute Chest Workout >>>

Time Crunch Training: 15-Minutes to Wider Shoulders >>>