During a long workout, emotional moments arrive when you feel like you just can't push any further, but you're able to get out of your head and persevere. But hitting that physical wall where your legs give out, all your energy is zapped, and your brain says "no!" is a whole different story that endurance athletes refer to as "bonking."
When bonks happen, there's a glycogen depletion in the muscles and liver that affects the whole body. The resulting feelings? Overwhelming full-body fatigue, heavy legs, and in some cases, dizziness or even hallucinations. With that said, if you properly fuel, it is possible to lower your chances of a bonk from happening to you. Learn the basic ways to keep this problem from getting in the way of your workouts.