I over trained and burnt out, took off 14 months. I use to ride my endurance rides at 200 - 220 watts for 4 hours. I couldn't ride 200 watts for 20 minutes . Good thing is, I only managed to gain 6 lbs in the time off. After 8 weeks things are much better, 200 watts for 3 hrs 30 min.. and I lost 2 lbs. I know, I have a long way to go..