I have ridden fixed centuries and have come off the bike feeling better than if I have ridden it geared... it probably stems from pedaling the entire 100 miles and not coasting an inch as this is not good for the muscles.

Folks think this is an epic thing to do... riding that far on one speed.

It's not.

Just converted my fixed gear Peugeot to a 6 speed... and I have to remember I can coast.