Robb was having a rough day last Saturday, and other than a visit to the vet, spent the bulk of the day in bed. The next day, he told me that he thought he was "paying the price for laying low." He was particularly troubled by muscular spasticity on Sunday.
Despite this, he and I biked twenty-one miles. We really exerted ourselves, physically. And the next day, Robb was completely wiped out. He was barely able to lift his feet off the floor on Monday night.
We're still trying to find the balance between these two extremes.