If fat were at 20 %, this would not leave efficient carbohydrates to maintain optimal muscle glycogen levels. (thomasdelauer.com)
Lower GI foods can also result in higher muscle glycogen levels (storing more carbs in the muscle), and less chance of storing the extra glucose as fat. (bodybuilding.com)
Another key finding: Despite their low intake of carbs, these fat - burning athletes had normal muscle glycogen levels — the storage form of carbohydrates — at rest. (on-keto.com)