Studies reveal going keto could boost performance for endurance athletes. One study highlighted how athletes taking ketone ester supplements experienced greater physical endurance because of the body’s ability to use fat as an alternative fuel source. 
Another study of endurance athletes concluded that adhering to a ketogenic diet for 12 weeks boosted body composition, fat burning, and performance during exercise .  Increased levels of ketone bodies from supplements could decrease protein breakdown and speed muscle recovery following endurance exercise. 
Increased Fat Burning
Research underscores how going keto can boost fat burning while exercising. For example, a study of 22 athletes over a 4-week period found switching to keto increased fat burning.  
One study looked at overweight adults consuming fat in place of carbohydrates for five months. The adults burned around 250 more daily calories compared to those adhering to a high-carbohydrate, low-fat diet.