I'm 77, and I discovered my love for running while serving in Vietnam. Now I work out 7 days a week.

Winston Hall on one of his cycling expeditions.

Courtesy of Winston Hall.

• Winston Hall works out seven days a week and spends up to five hours a day outside on his bike.
• The 77-year-old has been super-fit since he was drafted into the US Army during the Vietnam War.
• He wants other seniors to follow his lead by gradually increasing their movement.

This interview is based on a conversation with Rena Clare, 67, a retired professional photographer from Omaha, Nebraska.