Judy Eddy / WENN

Kenny Chesney is fit and muscular

Country music star Kenny Chesney shows off his discreetly bulging biceps during the 2009 CMA Music Festival in Nashville, Tennessee. This was on June 14 of 2009, the year Chesney turned 41. Chesney's superb fitness in his 40s is a reminder that osteoporosis can strike anyone as they age, and a regular workout routine -- which can include low-impact aerobics, elliptical training machines, gardening, breaking horses, mall-walking while shopping for cowboy hats, or performing country music -- can pay off in the long run.

See our biography of Kenny Chesney