Can Ketones Rev Up Our Workouts?
Ketone supplements that are supposed to mimic the effects of a high-fat, low-carb diet have become popular recently among athletes looking for a performance boost.
But a new study suggests that the supplements may not work as advertised and could have the kinds of gastrointestinal side effects that make starting, let alone completing, an event almost impossible.
Anyone who spends time around serious endurance athletes or their advisers has probably by now heard chatter about and enthusiasm for high-fat, low-carb diets. These diets are supposed to enable the body to become better able to use fat as fuel.
Carbohydrates are, of course, the body’s preferred source of quick fuel for muscles during activity. But our bodies can store relatively small amounts of them and may almost exhaust those stores during prolonged or intense exertion, forcing us to slow or stop.
But most of us have plentiful stores of fat. If we became able to efficiently use that source for exercise fuel, we could continue longer and more intensively (and also, if desired, rid ourselves of excess body fat).