Peg Doyle June 27, 2021 Aging, fitness, muscle mass, women's health Does the Name Kathrine Switzer Ring a Bell? Peg Doyle June 27, 2021 Aging, fitness, muscle mass, women's health Kathrine Switzer changed the future for women athletes in 1967 when she became the first female to complete the Boston Marathon. See the 10 tips she offers to older adults that make lifelong fitness a reality.