About 2 months ago I went to a virtually 0 carb diet, probably 50/50 fat protein. Started with a 5 day fast (have done many fasts in the past). Feeling pretty good, went from 220 to 210 (pretty lean to begin with). No calorie restriction
I stopped bodybuilding about 5 years ago (320 at my heaviest, have done it all drug and dose wise) and ride mountain bikes now, about 100 miles per week.
Most of the time I'm at about .6 mmol Ketone and 85 blood glucose according to Keto Mojo which puts be in "mild ketosis"
After a 3 hour bike ride my ketone is around 3.5 mmol and blood glucose still around 85 which is moderate to deep ketosis
Ketone levels vary alot based on activity, more active = higher ketone blood levels which makes total sense since more fuel is needed during activity.
I have sweet tooth and have been eating too much sugar lately. for me it is super easy to not crave anything when not eating any carbs so I just stopped them. Hopefully undoing the damage done by being close to 300lbs for 10 years.
I was worried about how 0 carbs would affect my riding and to my surprise it has not affected it much, I can now do a 3 hour ride fasted and feel to crash vs while eating carbs a 3 hr ride would require 200 grams carbs to not bonk.
Highest intensity efforts (180+ HR) I can't sustain for as long without carbs but moderate-high intensity I can go all day no with no food (around 150HR).
Long term goal is to lose 20-30 lbs to be more competitive in MTB races but 180lbs range would put me in the lightest weight of my life since I was 16 years old so might be wishful thinking.
Loving it