Can you tell whether you are a slow or fast oxidizer by the amount of food you can eat and digest comfortably? Me for exsample can eats small meals about 5x a day and feel great and some people can have 2 large meals. What's the science behind that? Am I a slow oxidizer ?
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What's the criteria for being a slow / fast "oxidizer"?
I feel like if you can eat 1-2 large meals a day without any snacking and feel great, then you would most likely be able to eat 3-6 small meals a day and also feel great. But if you need to eat 5x a day, that might imply weaker metabolic flexibility (glucose stability / insulin sensitivity / fat adaptation.)
In this study: http://www.ncbi.nlm.nih.gov/pubmed/15534426 the resting metabolic rate varies by only 100-160 calories. Total daily energy expenditure varies several-fold in humans, not due to variation in resting metabolic rate, diet-induced thermogenesis, or exercise thermogenesis, but rather, due to variations in nonexercise activity.
It's conditioning. It's all in you're head. Once you get used to eating in a certain pattern, it's hard to switch. Someone could try to switch and it might seem really hard because of years of conditioning, but once used to the new way of eating, it would be just as hard switching back to the old way as it was to switch to the new way. I eat twice a day, trust me, it's not hard. I think you might have a problem with controlling your appetite when it comes to food. You don't have to eat 5 times a day, 2 or 3 square meals a day is all you need. We're not cows that graze all day long, we're humans so we don't have to be eating so often. However, if you're underweight and you're trying to gain weight and put on some mass, then yes, go ahead and eat more often and increase your snacking.