This is of course, with a combination of other factors too, not just
the extreme calorie deficit (low - fat low - carb high - protein diet + exercise + metabolic slowdown + messed up thyroid function = hormonal disaster).
While we love our muscle, our bodies don't quite share the same feelings when it's in a prolonged
extreme calorie deficit.
Add in the extra exercise, and all of a sudden you have
an extreme calorie deficit that is working against you.
Not exact matches
At the
extreme low end, when your body fat can not «keep up» with the
deficit the
calories MUST come from SOMEWHERE.
Make sure you use this tool: KetoDiet Buddy - Easy Macro Calculator for the Ketogenic Diet and avoid
extreme calorie restriction - ideally go for a «moderate»
calorie deficit.