11/10/2005 AT 12:00 PM EST
Kenny Chesney is not a guy who takes his trademark 29-in.-waist jeans for granted. To maintain his famously buff physique, the country star follows a rigorous diet and works out faithfully, whether he's on the road or at his homes in Nashville and the Virgin Islands. The physical exertion, he points out, also helps relieve stress, and after the year he's had, "I've had to put a new belt on my treadmill," Chesney says. "I've been on it a lot lately."
Certainly there's been the stress of logging thousands of miles on his tricked-out tour bus this summer, preparing for the release of his new album The Road and the Radio
and working on his ABC TV special airing Nov. 23. But what occupied his thoughts most as he ran his treadmill right into the ground was the painful collapse in September of his four-month marriage to actress Renée Zellweger.