I have been commuting 2 to 3 days a week, 36 miles round trip, for the last 10 years. These rides are not particularly fast, and one day between rides is usually enough for me to recover.
Lately I have been riding fast 40 to 60 milers on Saturday morning, and I don't feel fully recovered until Wednesday. That is, if I try to commute before then, my legs have nothing in them. So does 3 days for recovery from a hard ride sound right to you all? How many days for you?
I will be 50 in February.