It's been 93 days since I got on the bike again after months of illness thanks to CFS. The first session back then lasted 15 minutes and I had to rest afterwards.
After 75 days and 52 training sessions, I could ride at 231w for three hours at an average heart rate of 130bpm again. When I first got on the bike again I was only at 150w. So we're talking more than one watt per day of progress. I was EXCITED.
But then two weeks ago a cold hit me. I tried to ignore it and ride. I got on the bike afterwards too soon. I got frustrated. I made it worse. I'm an idiot.