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High Rates of Fat Oxidation Induced by a Low-Carbohydrate, High-Fat Diet Do Not Impair 5-km Running Performance in Competitive Recreational Athletes

In this 2019 trial, Tim Noakes et al. demonstrate that athletes can achieve similar performances on a 5K time trial while following a low-carb or high-carb diet, contrary to the widely assumed understanding that low-carb diets cannot support effective exercise at high intensities. At minimum, this research indicates a low-carbohydrate diet does not negatively affect performance beyond a small impairment seen during an initial two-week transition period.

Read MoreHigh Rates of Fat Oxidation Induced by a Low-Carbohydrate, High-Fat Diet Do Not Impair 5-km Running Performance in Competitive Recreational Athletes