If untrained guys eat a high-fat diet for 7 weeks, their muscles use less stored sugar during medium-intensity exercise compared to eating a high-carb diet — it’s like saving their fuel — but their...

Even when eating almost no carbs after a race, athletes who’ve been on a high-fat, low-carb diet for months can still rebuild their muscle sugar stores just as well as those eating lots of carbs.

After biking really hard and then eating a lot of carbs for a few days, your muscles store way more energy than they do after running hard and eating the same way.

If Japanese male endurance athletes don't eat enough carbs after tough exercise—like less than 7 grams per kilo of body weight—their muscles refill energy slower in the first half-day, especially between 4 to 12 hours after.

If Japanese male endurance athletes eat only 5 grams of carbs per kilo of body weight after tough exercise, their muscles don’t fully refill their energy stores in 24 hours. But if they eat 7 or 10 grams per kilo, their muscles do recover completely in that time.

Mice that exercise and eat very low-carb diets still keep their muscle and energy stores, probably because their bodies adapt to use fuel differently.