When you perform it regularly, the body increases the amount of energy it burns while at rest as well, allowing for greater fat loss all throughout the day. (fitnessandpower.com)
Thus the more energy you burn while hanging out on the sofa. (tomcoffeyfitness.com)
Think of it this way, the longer your workout is the more energy you burn up - energy your body could be using to fuel the growth process. (weightrainer.net)