Just one 45-minute high-intensity workout can help increase your RMR (resting metabolic rate) by 37 percent for up to 14 hours post-exercise, a study in Medicine & Science in Sports & Exercise suggests.
You can do 45 minutes! Just lace up your sneakers and head outdoors for a run. It’s okay if you can’t run the whole time, but make sure you’re heart rate is up; you want to be working out at about a 7 on a scale from 1-10! Or, hop the elliptical or bike at the gym and crank up the intensity! You don’t need to worry about throwing in additional intense intervals – you should be working out hard enough as it is. Just make sure you’re working at an intensity that makes it difficult to carry a conversation.
You’ll burn hundreds of calories during your workout, an additional couple hundred for hours later!