it is definitely worth it. i suggest eating well, sleeping well, and resting those muscles as much as possible. it's actually the rest time that allows your muscles to recover and rebuild, that's where you gain muscle, strength and endurance. don't let it catch up with you, you will be glad you got the rest you need next time you get on the bike. before you know it, you won't be as tired after a ride. but you will always need that rest...