You might need to build in a cooling off period into your riding. Here in New England, I ski during winter and ride my bike much less. This past summer I also walked at the local state park which I also enjoy doing and used slightly different muscles. If I travel to the mountains for a much more strenuous hiking experience, then many more different muscles are used much and much harder also. Pro athletes also do something similar that they call cross training. I think the idea is to promote balance.