Weightloss and bikingWatch
I've been intermittent fasting for about 2 weeks for 23 hours a day with only 1 hour eating periods - I'd only consume about 300 calories max. Every time I have tried to exercise, I've felt like collapsing.
Note: I've been fasting because I was originally classified as obese weighing 78kg at a height of 5'2" back in May of last year. I'm trying out fasting as I am still on my weight loss journey even though I've lost 20kg.
Anyone that thinks eating 300-800 calories /day is a good thing is very much mistaken, that is way too low and can be quite dangerous, eating 800/day should only be considered if you are instructed and monitored by a healthcare professional eating less than that is, well it isn't going to end well.
Thinking eating 800 kcalories is enough even though you have suffered some of the issues it brings and thinking that 1200 kcalories is too much and will cause you to gain weight is a problem.