I've read about this crazy sustained energy you get from being keto adapted, but I've never experienced that. A lot of people say they have though, so maybe it's just me. I'm on some kind of low carb all year but whenever I've gone strict keto, the goal is to lose weight or be less fat. I think any time you attempt to get burn fat, you will inevitably feel like shit and performance will suffer a bit in the gym. I've been told staying off carbs will give you better performance when you do get on them before competition.
I can tell you that you don't get those carb induced comas. I used to get those often, but now when I eat a my seldom big carby meal, I feel fine so that seems to suggest I have better insulin sensitivity... whatever that means.
Speaking as this guy's trainer, there's some supervisory information needed:
During a cut for an athletic event, the workload goes up. It's perfectly normal to feel like shit no matter what one is doing. However, my athletes rarely ever need to do the dumb shit weight-cutting athletes typically need to do to make their weights. Spending long times in steam rooms or saunas, wearing plastic at the Gym, etc. That's almost NEVER needed. Also, what's not being said is having worked with Mike through a couple of cutting cycles, while he's reporting to me that he feels like shit, form and performance actually get sharper closer to the bout itself, not worse. And at fight time, the opposition tires out faster than we do:
Just for shits and giggles, here's a couple more low-carb fighters, sustaining their energy:
^The one who boxes the other kid's face off.
The one who beat the piss out of the other kid^.
^The one who beats the piss out of the other kid.
I have a ton more of these. Despite some stuff I've heard about it being "scientifically impossible" to be an athlete using low-carb nutrition.
Wait wait, that was weight lifting right?
Low-carb weight lifter who was IN ketosis during this meet:
(He had a diet log called "Goon goes keto" but didn't have time to maintain it.)
Here's another one who was on a low-carb plan because he wanted to lose fat and retain as much strength as possible:
But hey, what do we guys who actually take athletes' health as our responsibility know, amirite?