Eating prior to exercise is sensible for individuals who cannot exercise unless they eat something, and keeping insulin levels low is key for body fat reduction.

“But if you can't even get to the exercise, if you're somebody who just can't do the training at all, you're unwilling to or you're incapable of training, unless you eat something, then obviously eating something makes the most sense. And what you eat prior to exercise, that's a whole other biz that people argue about and fight about whether or not you should go into it with low carbohydrates or higher carbs, all of that. But in general, the theme there is very simple. Which is that you want insulin levels to be pretty low if your goal is body fat reduction, if you want to oxidize body fat.”