But it is more efficient at burning calories, even at rest.
On average, 10lbs of muscle will burn 50 calories per day compared to 10lbs of fat, which only burns 20 calories per day. This all happens even when you're not doing anything, move around and you become even more efficient at burning calories.
As if I hadn't already given you enough reasons to lift weights and build muscle tissue, here's another one. 😁