FitFoodie wrote:Possibly this is even where some of the benefit of exercise comes from, though I think most people DO eat before exercise, fearing low energy if they don't.
Does this all seem unexpected... or obvious lol?
Tincup wrote:Ketone measurements are interesting as, depending on what you are measuring, you have storage (generally beta hydroxybuterate in the serum), production by the liver and usage by the body. Exercise, low carb diets, medium chain triglycerides (especially caprylic acid, C-8) and fasting can increase production. Exercise and also long term adaptation can increase usage. When measuring urine ketones (acetoacetate), you are measuring those that are unused. In many cases, these will decrease over time as the body gets more efficient at using these ketones.
xactly wrote:Rhonda Patrick (Found My Fitness) has shared research that says you only burn fat when you exercise in a fasted state. She also wears a continuous glucose monitor (CGM), and she said exercising while fasted helps keep her glucose and insulin in a steady state the rest of the day. She said exercising after eating does not provide the same benefit. I'm trying to exercise in the morning now before breakfast; however, I'm not fully fasted, since I generally consume a couple of lattes in the morning (using homemade almond milk and 1 tsp of Monkfruit sweetener in each).
Tincup wrote:I've been keto-adapted for over 10 years. From May 2019 to around Dec, I intentionally ate 200 or more grams/day of carbs as starches. Only once or twice were my morning serum ketones a zero on the meter (usually after a 12 hour fast). Since I started this extended fast - hadn't done one for a year or so - I've not had to adapt (i.e. no keto flu). This has been true since my initial adaptation.
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