When it comes to burning fat, most people depend primarily on a low-carb/ketogenic diet. And while diet certainly serves an important role in metabolic flexibility, one major factor in our ability to burn fat vs. carbs is exercise. Exercise plays a big part in how metabolically flexible we are. And although it may seem that the more we exercise, the more fat we'll burn, it's not that simple. In fact, exercise can also make us metabolically INflexible! In other words, too much exercise can act...