I'm in my 70s, I exercise differently than I did when I was younger. I enjoy paddleboarding and yoga instead of running marathons.

Courtesy Louisa Rogers

• When I was younger, I was competitive and ran marathons. I also cycled and enjoyed rock climbing.
• As I've gotten older, I've let go of the need to prove myself. 
• Now, I focus on getting movement in different ways, including paddleboarding and yoga. 

In 1987, I ran the Big Sur Marathon, whose inspired pitch, "Run Along the Edge of the Western World," was irresistible....