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If you are having a glucose drop if you don't eat before working out, could it be because the body is not trained to be metabolically flexible. By that I mean being able to switch easily from burning glucose for energy and instead burning fat and using ketones for energy? Just my 2 cents from all my reading from what Peter Atilla, Dave Asprey, and Gundry say from their research. I.e. I used to always need food before working out. Now I can wake up and work out, no issues, then have my first meal at lunch. I have even worked out during a 24 hr fast. Working out during a 4 day fast is difficult on day 3, so in the past I took it easy for day 3 and 4 by just taking walks.

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thanks Mitul, I don't think this is necessarily relevant here: I have no issues training fasted, but what I describe is an hypoglycemic response to food + exercise that is quite typical and well known, just due to timing of food intake. Not eating is certainly not the answer, especially for endurance athletes training many hours per day. Take care

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