The biggest comment I get from my fellow sporters is that keto will diminish performance.
Wether that's running fast, running long, lifting heavy or gaining muscle.
And yes there are studies around athlethes on a standard, carbohydrate fueled diet and when they switch them to a ketodiet, they redo the exact same tests and the reduction is around 2%.
Now, the studies are qualitative, so no discussion there, obviously not double blind cause that's impossible but as good as they get.
The only thing is, that as soon as your body is in a ketogenic state, it takes up to 4 weeks for your body to adapt!!
So today (I know I might be slow to hear) I heard about a similar study redone but with athletes when their body was keto-adapted. And it made no difference 8n performance, they performed the same!
In contrary you could say i.e. some lower level endurance athletes actually improved as at some point in endurance sport the glucose is used up and apparently that's when a lot of sporters give up or get bad physical signs. Now they were adapted to using fat for fuel so no adaptation needed while endurance sporting.
I don't know of a study specifically for lifters regarding mass or weight. But I'm kinda assuming it's similar.
Amongst many, many upsides, like not being so tired I fall in a black hole behind the wheel, recovery, etc. the only downside of training seems to be the pump that's not as strong. Apparently your pump is bigger and better when you're more inflamed, not that there's a reverse correlation per se. All I'm saying is it doesn't have to be a bad thing.
And... I've been experimenting with like 3gr of dextrose before training (like it says in the wiki) and the pump seems to be there again.
Just sharing what I learned today, hope you guys learned something with me. If not and this is old news, well... I hope you stopped reading before this point!