I run anywhere from 30 to 70 miles per week and I just couldn't follow a keto diet. I have a hard time even just picturing it. Just the other day I was reading

I run anywhere from 30 to 70 miles per week and I just couldn't follow a keto diet. I have a hard time even just picturing it. Just the other day I was reading about a recent study showing that low-carb diets affect your running. That already made intuitive sense if you had been in a marathon and hit the proverbial wall at mile 20, roughly when you have depleted the glycogen stores in your legs and start burning fat. Of course the general population is different and doesn't obsess over their 10K times. There are other factors that play a major role. I don't like meat much. I'm lactose intolerant. I've always had a sugar tooth. Thanks to lucky genes, a very active thyroid and the running, though, my body fat stays around 8-9%. Over the years, I learned to crave carbs less and to pay more attention to protein. I do some form of intermittent fasting, by accident, in the sense that I have early dinner, mostly for sleep hygiene, and rarely eat again until after my morning run, about 14 hours later. There's no single approach that works for everyone, of course. Worse than that, though, is that even if you find the motivation to try a variety of them, you probably want to spend at the very least several weeks on each before you can start extrapolating useful observations.