I ran it for around a year and lost 40lbs. A large percent of that was muscle. I went from 180 to 140 at 5'11''. I found it to be unhealthy in the sense that I was constantly obsessed with getting a lower number on the scale, and it was, admittedly, an obsessive lifestyle waiting all day just to binge for a couple of meals. Just my two cents though.
Because I was a moron. I also remember having ALOT of brain fog. It truly did become an obsession of mine to get a lower number on the scale. I couldn't think about anything else, and it was to the point that I didn't care what I looked like. My happiness was based on a number. Needless to say, I don't think it's a healthy lifestyle. IF definitely is not for me, and while I can't say that the lifestyle is what caused me to get caught up in my weight, I do think that it contributed to an eating disorder. I forgot to mention that during this time I binged on ~ 14,000 calories one night. Had to go to a medical clinic and miss a week and a half of class because I thought I had an ulcer or was dying or something. My hormones took a major hit as well. I still get depressed quite a bit, but back then I was way worse off. It was an emotional rock bottom in which I always felt like a complete failure. Sorry... tangent. over.
We all make mistakes but glad you are healthy now and feeling better.
I've tried many plans for eating over the years. IF is by far my favorite. As others have said building appreciable muscle while on long fasts can be difficult. I alter the feeding window to suit my goals. When clean bulking I have a longer window of about 10 hours. When cutting I go for longer fasts in the 16-18 hour range. Eating several small meals a day meant I was always hungry. On IF I just have to tolerate the hunger while fasting and then I can stuff myself while still staying in a caloric deficit. Kinda of a feast and famine protocol.
I've noticed that most people in the IF camp, including myself, are predisposed to that kind of diet (don't have big breakfast appetites as an example).
It sort of just makes sense when you think about it. I know I fall in that camp. I can go to bed with my stomach roaring and still wake up without much of an appetite. From lunch through dinner though my stomach is a bottomless pit lol.
I actually was one that ate enormous breakfasts my whole life. As a kid I woke up to my dad putting out plates of eggs, peppers, sausages, pastries, etc.. So when my schedule started changing a couple years ago and life got insanely busy, I started to skip breakfast, but I never made up for it and my diet started to slide because I'd be famished and then eat crappy. So I readjusted and went through a tough week or two, but then my body just adjusted. Now, I eat my last meal around 7-8 and really don't even think about food until 11ish. Then I consume a little less than 1/2 my daily calories, then have a late afternoon heavy snack with about a 1/4 and then eat dinner with the family finishing off the remaining 1/4. There is no set in stone and some days I eat a lighter first meal if I know we are entertaining or going out and I'll be eating heavy. The best part is that I am not constantly chasing my next meal and have a lot more energy and time.
Yeah I love how IF makes things simpler. I hate planning so many meals and having to get so much food in, feels like a chore. It takes a bit to get used to but once you do, for me at least, there is no going back