Just some more thoughts-
Firstly, it is very encouraging to see this stuff being discussed, the "success" I've had doing something a little different than the accepted dogma is just a one person example- one that may or may not be of benefit to others. I share it just to provide a framework for discussion and I continue to learn daily!
Just to address a few specific points in which I was referenced
1. I have definitely played with multiple fueling strategies over the last few years with regard to carbohydrates- I did 36 hour massive re-feeds (carb nite) often taking in over 1000gm of carbs in 36 hours (generally I would gain 10-12 lbs in that time. Obviously lots of water), I have done targeting carb cycling- taking a small amount of simple carbs prior to workouts,I have done smaller (200gm) carb loads the night before training- I could not perceive a clear benefit in my training with any of these strategies, especially as I became further and further "fat adapted"- what I did find is generally a lot of gastrointestinal upset and just a general increase in aches and pains. Currently, most days my carbs are between 10-50gms, often I only eat 1 meal a day and likely spent a fair bit of time in ketosis (although I never check levels as I don't think they are all that relevant to what I am trying to achieve).
With regard to constipation- when I first went very low carb and dropped my meal frequency I definitely did notice some constipation- that lasted for a few months and then things normalized and to this day I have no issues (unless I up carb/grain intake and then I tends to have lots of bloating and diarrhea)- my thoughts are that gut biome adapts to whichever chronic diet we choose.
As far as the breath and body odor stuff goes- it has been a very similar story as I could taste "ketosis" on my breath for a while but again that went away- again what is thought to happen is that we get better at utilizing the ketones and thus less tend to be excreted in breath or urine.
There is an extreme paucity of research on long term "Keto" adapted athletes-to point the only study I am aware of was done by Jeff Volekhttp://www.sciencedirect.com/science/ar ... 9515003340
This study looked at endurance athletes with an average of 20 months of Keto adaptation (contrast with the vast majority of studies looking at 2-6weeks trials)- it is well worth a read. The take away points from my perspective are that there appears to be a continuation of the adaptation process which extends beyond the typical 3-4 week period that is often cited. The other very significant point was that the muscle glycogen levels were basically identical between chronic high carb athletes and chronic low carb athletes- this was both pre and post exercise. This shows that with long enough adaptation the body gets more efficient at turning things like lactate, protein and glycerol into glucose and subsequently glycogen- if muscle glycogen levels are equal in both groups than one has to wonder what is the advantage of eating more carbohydrates for the long term Keto adapted athlete? Can we assume brain glycogen is also preserved in this instance if we are going to discuss Tim Noakes central governer theory?
It has been pointed out that my life situation may put me in an advantageous position and no doubt that is true. I am extremely fortunate to be able to have a home gym and have nice equipment. I will point out that my food, while high in quality and nutrient density is overall less expensive than the way I used to eat. For example today I will likely only have one main meal (which was a 10 egg omelette with 8oz of bacon and about the same amount of cheese, also about 2 cups of spinach to which I added a lot of olive oil) I might have a little smaller meal later if I'm hungry (but often I am not)- this food for the day is likely less than $10 and I think fairly reasonable for most people.
I certainly don't attribute my ability to perform at a high level to be solely attributed to diet (however I do think it does play a significant role). I am very conscientious about getting adequate sleep, I think cold immersion helps me to recover as well. I am extremely competitive and push myself very hard. That competitive drive resulted in me winning a master's world championships in the Highland games, setting a masters national deadlift record and achieving all American status in 3 separate track and field events (all of this was achieved using as standard high carb diet)- my decision to switch was one of purely health reasons, but I have found, at least for me, it has seemed to enhance my ability to train and I literally feel as though I am younger!