Gold Coast, Queensland, Australia - passionfruit capital of the universe!
Most weeks, none. Having said that, my commute is 25km and totally flat. If I'm feeling tired I can just take it easy -- which is basically the same thing.
"I am never going to flirt with idleness again" - Roy Keane
"We invite everyone to question the entire culture we take for granted." - Manic Street Preachers. My blog. My bike tours. Japan tour page under construction.
Most of the training guides I see say light/off on rest days. That means you can ride for 5 miles, just don't get your heart rate very high. The problem I have is that 5 miles turns into 10 and I want to start going hard. Another thing to consider is that absence makes the heart grow fonder and when I take days off I seem to enjoy the next day more. But if just sitting around is bugging you, then 5 miles shouldn't hurt.