When I used to get weak its cos I wasnt eating regularly. The keto, running on fats, makes you less hungry so I would workout when I hadnt eaten in a while. So yeah, eat regularly even if not hungry. The weird period should take around 2 weeks so hopefully youll be out of it soon.
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Thanks. I'm now going hard at it to avoid sugar cravings, but when it comes to feel better, I plan to throw in small breakfast. Now when I eat anything my brain goes boom, so I keep that for one rich dinner. I'm not sure I'd keep calm during a day started all nibbly like this.
Good luck, always hard to lose weight. I need to do something similar myself!