The first woman to complete the Boston Marathon is now 78 and runs most days. She shared 3 tips for getting fit at any age.

In 1967, Kathrine Switzer became the first woman to officially run the Boston Marathon. A race official tried to stop her (right).

Kathrine Switzer/GALE Partners

• The first woman officially ran the Boston Marathon in 1967, despite an official trying to stop her.
• Kathrine Switzer has dedicated her life to making running more accessible to women.
• She thinks anyone can get fit at any age and shared her tips for doing just that.

Kathrine Switzer was the first woman...