It does take about 6 months for your body to switch over and return to the same strength before you made the diet switch.
Ketogenic Diet
I've been on the Ketogenic Diet for three year due a Metabolic Condition. There's definitely a learning curve and adjustment time period before you become acclimated.
With that in mind, let me address...
The idea that too much protein will knock you out of ketosis is a myth.
Fact: Too Much Protein Will Knock You Out Of Ketosis
Consuming too much protein is a fact rather than a myth. Research by a multitude of individual (Drs Volek, Phinney, Wilson, Attia, etc) have demonstrated that.
My Personal Data
Initially, I used the Keto Test Strips that you pee on. The readings were inconsistent and eventually, the Keto Test Strips just didn't work. That appears to be an issue with many individuals.
I now have a Ketometer which provide me with a much more consistent and reliable reading. The Ketometer has demonstrated a definitive fluctuation in my ketones dependent on protein consumpiton.
Too much protein pushes my readings down to .6 mmol/L; .5 is considered to mean you are in light ketosis.
When I maintain the right protein to fat to, my reading are between .9 toi 1.2 mmol/L with my highest reading being 2.0
Keto Chart
Gluconeogenesis
For those who are reading this and unfamiliar with Ketogenic Diet...
When too much protein is consumed, it is converted into glucose (gluconeogenesis).
The majority of individual who try the Ketogenic Diet are never on the diet or in ketosis.
They end up being on a high fat, high protein, low carbohydrate diet. That in part is why the don't perform or feel well.
They are still "Glucose Dependent". However, they don't have enough glucose to make thing work right and they are able to effective access ketones for energy.
Dr Shawn Baker's Carnivore Diet
Baker performs well on the Carnivore Diet, a high protein diet beyond the recommended percentage for the Ketogenic Diet.
In a discussion with Snowman, he pointed out that Baker's high protein intake/ percentage intake enabled him to covert protein to glucose energy; Baker still having enough protein available to maintaining and increasing muscle mass.
The Take Home Message
High protein doesn't mean you are on a Ketogenic Diet.
Actually, more athletes are switching to this because of lower inflammatory markers, means they heal from injuries faster.
Athlete Switching To Keto
I question if many athletes are switching.
1) Most likely the majority end up going on a high fat, high protein, low carbohydrate diet; believing they are on Keto.
There is a huge misunderstanding of what a Ketogenic Diet; what to eat and how to make it work.
2) The majority of individual who to get it right when they are on it, can't hang with it; there is high drop out rate.
a) Due to how restrictive the Ketogenic Diet is very few individuals/athlete are able to maintain it.
b) When their strength/energy levels drop, most panic and stop the diet.
c) These individual don't understand that the Ketogenic Diet requires a completely different training protocol. They continue with the same training protocol they were using on a Standard American Diet, which doesn't work well.
A Ketogenic Diet Strength Training Program (Limit Strength, Power, Speed, Hypertrophy, etc) requires a different approach.
Continuing to use the same training protocol for a Ketogenic Diet as you did with a Standard American Diet amount to using a crescent wrench to drive a nail instead of a hammer.
The crescent wrench can get the job done but it isn't the right tool for the job.
Kenny Croxdale