For a short period of time I experimented with Intermittent Fasting (18 hour fasts with a 6 hour "eating window") but then stopped after reading about the detrimental effects that IF can have on teenagers (I was 17 a few weeks ago). I'd never felt low energy during a fast, but very rarely I started to feel very energetic, almost jittery. At some points I would feel light-headed, but still wouldn't be hungry. Also, after a hard workout (lifting heavy things) I don't always have an appetite so sometimes I don't eat straight away. A few hours after I have finished lifting, I'm still not hungry, but, again, I start to feel light-headed and lethargic.
Even though I'm not hungry, should I be eating if I start to feel this way? Has anyone else experienced this?
I doubt the stats would help, but I'm a 17 year old female, 172cm and 62kg.