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High performance and high HbA1c: fitness does not guarantee protection from poor sleep
Fitness, Human Performance, Metabolic Health, Sleep, Stress Ranulf Crooke Fitness, Human Performance, Metabolic Health, Sleep, Stress Ranulf Crooke

High performance and high HbA1c: fitness does not guarantee protection from poor sleep

Here’s a conundrum.

You are fit, with high VO2peak, low visceral fat, and reassuring lipids.

Yet HbA1c sits high normal, or drifts into the prediabetic range.

The default explanation is insulin resistance.

In some lean, high performing people, that explanation does not tally with the rest of the data.

I think this is one of the more interesting mismatches I see in my practice. You can have obvious signs of good “peripheral” metabolic health and still see suboptimal blood sugar levels.. The current evidence suggests that sleep, stress, and insulin secretion may explain part of that gap, although the phenotype is not yet defined as a formal syndrome in the literature.

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