Or will they?
Actually, they won’t.
It’s true that muscle glycogen is synthesized more rapidly if you take in some carbs immediately after a workout rather than several hours later.
In fact, delaying the consumption of post-workout carbs for just two hours has been shown to slow the rate of muscle glycogen resynthesis by as much as 50%.
But as long as you’re getting enough carbohydrate in your diet, glycogen levels will return to normal after a day or two, regardless of when that carbohydrate is consumed.
Put differently, the speed of post-exercise glycogen synthesis is not important as long as the total carbohydrate need for the day is met.
Unless you’re doing multiple daily workouts, a decent muscle-building diet will provide enough carbohydrate to restore glycogen regardless of whether or not it’s taken immediately after training.
Think of it like putting fuel in your car.