Is fasted energy expenditure work best?
It is true that free fatty acids are slightly higher after a nightly fast. And when one engages in a low to moderate intensity bout of energy expenditure work, they may use slightly more fat as fuel. However, cortisol and catecholamines are also higher at this time, and these hormones can break down muscle tissue. With all factors considered, doing fasted over non-fasted energy expenditure work will likely make minimal to no difference in the rate or total amount of body fat lost. The best time to perform energy expenditure work is at the time of day that is optimal for your energy levels and that you can commit to with your schedule. To read more on this topic, check out the The Fasted Cardio Roundtable and Fasted Cardio Research.
