[ebg13]

> How does working out at a high intensity work when in a state of Ketosis?

I've done this. You get tired much faster, you will not be able to sprint for nearly as long, your maximum lift significantly decreases, you hit the muscle fatigue point (can't lift again unless you lower the weight) very quickly.

The usual solution among keto lifters is to have a carbload cheat day once per week _or_ to carb spike with I think (it's been a while) pure glucose syrup a measured amount just before your workout according to how much you think you'll actually use during the workout. The cheat day in practice works pretty well, because if you're slamming your body at the gym every day you can get back into ketosis very quickly after the initial induction phase is done, so you end up with a couple of days of keto per week but not the full week.

[sizzle]

Can you take vitamins like B complex with electrolytes and sugar free, no carb protein shakes with caffeine to get some energy back?

[ebg13]

The problem isn't lack of energy. The problem is muscle and cardio exhaustion. You feel great, not tired, just your muscles stop working and you run out breath. So I don't think that vitamin, electrolytes, or more calories will help. If you're lifting seriously, you're already consuming plenty of those things.

[pawelduda]

Agreed. The difference was noticeable and as soon as I started eating carbs again, my strength increased in a matter of day or two.

[wtetzner]

How long were you in ketosis before you stared eating carbs again?

[pawelduda]

Between 2 and 3 months

[achenatx]

this was my experience. My endurance was unaffected by ketosis but my ability to generate instant power over and over again (mountain bike) definitely took a hit.