Road to recovery

After four days of being sick I'm finally starting to feel close to 100%. I rode my bike for the first time yesterday after being off my bike for three days. I felt really week. I'm hoping I didn't lose too much fitness.
I mostly noticed the loss of fitness when I was riding up HWY 9. I thought about riding up to Skyline, but decided to not chance it and went down at Redwood Gulch. Overall the ride went well, minus the flat tire, and it felt good to be back on the bike.
We'll see how I do today. I'm doing a 3.5hr ride with attacking sprints every 15minutes. I'm not really looking forward to the long ride, but the sprints will help break things up a bit.