It's true that doing cardio, such as walking, running, Spinning, or jumping rope (basically anything that gets your heart rate up for an extended period of time) burns calories. It's also true that you should incorporate cardio into your weight-loss plan if you're trying to burn fat. But it's just one piece of the puzzle.
"Cardio is not the only way to burn fat," NASM-certified trainer Ashley Stewart told POPSUGAR. "This can also be accomplished through strength training." She explained that since muscle tissue burns more calories in your body than fat at rest (your body requires more energy to support muscle tissue), you will continue to burn calories if you build muscle mass.
"This energy can be taken from fat reserves," she explained. "As people mix strength training into their workout routine, their body will lean out due to the increased demand from the muscle they are building."