I know that the whole paleo community has learned to become increasingly macronutrient agnostic, but I was wondering if anyone who has experimented with both sides of the spectrum--high carb and high fat-- can discuss which approach afforded an easier time fasting/being able to get work done without being fettered by having to eat.
I'm well suited for this one.
I've done a 16/8 style IF for years. Over that time I've been zerocarb, LC, all the way to now where I'm doing over 400 grams of carbs per day.
I will say with lower carb intake I definitely felt less hunger. I'm not a LC advocate but I do acknowledge that hunger signals or pangs are greatly diminished with lower carb intakes.
That being said I am still IF ing now with my high carb intake. It's no harder. I do indeed feel the onset of hunger in a more traditional or normal way now though. It's not a big deal; I simply wait and eat in my window. I think it's good to feel hunger.
I continue to IF because I feel way more efficient in the rest of my life without a break for food in the morning.
I've done both, but only with the caveat that each was in a calorie deficit:
Low-carb Experience: Fasted state was easier. Training of any sort sucked.
High-carb Experience: Couldn't extend the fast as long, but I was actually able to get off my butt and happily lift some weights.
In a maintenance phase, each was equally amenable in relaxed situations, but obviously the high-carb diet fueled better athletic performance.
What are your goals?
Low carb is easier for me to do a daily 24hr fast. I can easily hit my workouts on a low carb diet with plenty of energy. Maybe its cause I only do a max of 3 intense sessions a week rather than 5-7 days or other some such program.
I did a 20/4 fasting style with high carb and with carbs under 50g.
Fasting for 20 hours, sometimes more was not a big deal on high carb, and was only mildly easier on low carb. On low carb I eventually started to get insane fatigue though, so now I don't really go for any certain carb intake, nor do I fast as long. Also my body fat is very low, and I'm very active, so running off of only fat may not be the best idea for me personally.
In my experience fasting is something that you adapt to regardless of macronutrient intake. You adapt to being able to switch fuels.
It was not until I went low carb that fasting even seemed possible. An old blog post of mine from 2008.
Before then, I was addicted. I'd be ravenously hungry by 9am, and over at the local coffee shop pounding down a crossaint filled with ham and cheese.
For me fasting is easiest low carb, meaning < 50g starch per day, no fruit, and not counting fibrous vegetable carbs. I don't particularly enjoy IF-ing very much though... at least in traditional 18/6 lean gains fashion.
Low Fiber High Carb vs High Meat Fat 4 Answers