Is eating plenty of carbs to have good performance during exercise a “free lunch”? It’s more like it’s just optimising what you eat to give the body what it nee

Is eating plenty of carbs to have good performance during exercise a “free lunch”? It’s more like it’s just optimising what you eat to give the body what it needs during exercise, no? Creatine is pretty much in that category. It’s just a natural source of energy, essentially. You get it in some food as well. And you don’t get much benefits unless you’re doing strength exercise. There may be some benefits for the brain as well, especially in older individuals. I doubt that there’s any significant downsides in general.