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“Consider this: If you exercised at 85 to 90 percent MHR for 30 to 40 minutes, you would burn mostly carbohydrate. Carbohydrate is restored on a nearly daily basis, which means that this approach causes very little fat-weight loss. This is why many people exercise hard and yet do not lose weight and may, in fact, gain weight. The substrate (fat or carbohydrate) that is burned is pretty much a function of the oxygen available.”
― Heart Rate Training
― Heart Rate Training
