I did increase my protein component, to around 75-77 grams per day or even more on really heavy exercise days, which is significantly higher than many people eat on non calorie restricted diets. My typical exercise ‘fuel’ was, and still is a homemade protein shake ( I tried eating a meal instead but rarely felt able to exercise after eating and my badminton sessions start at my normal evening meal time) with 40g whey protein in it, cocoa powder, 10g carbs in total, and some omega 3 fat and fibre from chia seeds. This was started before my session and finished afterwards, so I had plenty of fuel, even though my daily calories were low. I am a little higher than that now I am on maintenance but have mainly increased fat and carbs (though still mostly healthy ones) to get my calories up.
I am starting to think that when we eat is at least as important as what we eat when it comes to staying healthy, and I am sure that fuelling my exercise like I did was what made it possible for me to continue in the way I did.
I haven’t varied my exercise program much, I was doing the badminton sessions before I discovered BSD, and I vividly remember ‘hitting the wall’ for a few weeks when i went really low carb before the problem just melted away, and I was just as able to keep going as I was on my former carby diet.
My advice would be to keep the protein high for the muscle repair and building, set the fat according to something like Martin Ankerl’s keto calculator to activate the weight loss (Google it, that was my main go to for advice on how to change my macros as my body composition changed) and carbs is whatever is left.