Originally Posted by NOS88
In response to OP querry. I suspect many cyclist would experience a similar thing. Just as you did when you started cycling, pacing is a good thing in your overall development.
I think this issue is important enough to share some more information.
I switched from jogging to biking about 15 years ago. I did a lot of biking. (5000 miles/annual ++)
During the winter months I had to find another form of exercise. So I used a trainer. Some years later I decided to do fast walking at 4 MPH for 12-16 miles on pavement with state of the arts cushioned shoes.
To my surprise I could barely walk after I got done. Pain in my foot ankles.
Well, I kept at it and eventually it went away. To me that means that just biking is not good enough. I have to also do other exercise to keep fit.
Now relate this story to my question about squats. And I had a similar experience with my shoulder.
My opinion is that inactivity is very bad.