So why am I in ketosis, even though I might “perform” better at some things if I ate carbohydrates? Because I’m a 39-year-old wannabe athlete whose athletic performance is irrelevant. Not a single person cares how fast I swim or ride my bike beyond myself. I have no sponsors. I will never earn a paycheck for how fast I can flip tires or climb Mount Palomar . I am more than willing to give up some athletic performance (., sprint speed, peak power) in exchange for other athletic benefits (., greater aerobic capacity and metabolic flexibility), especially when the real gain is greater health and a reduction in my risk for all diseases associated with metabolic syndrome (heart disease, diabetes, cancer, Alzheimer’s disease, and others).