After doing weight lifting or short bursts of intense cardio, your body keeps burning more calories for hours afterward than it does after a long, slow jog—even if you burned the same total calories during each workout.

After a hard weight workout, your body burns more total calories during your next cardio session than if you did light weights or no weights first.

Doing a tough weight workout before jogging or cycling helps your body burn more fat while you're doing the cardio.

You can make your workout feel harder and your muscles burn more by resting less between sets—but you can still lift the same total weight without getting weaker.

If young men lift light weights with very short breaks between sets for 8 weeks, their upper arms grow more than if they lift heavy weights with long breaks—even if they do the same total amount of lifting—because the short breaks create more muscle-burning stress that helps muscles grow bigger.

When you lift a weight you can do 15 times, for 5 sets of 10 reps, your body’s energy burn depends mostly on how much muscle you use and how tired you get—not how fast you lift or how heavy the weight is relative to your max.