BC-WELL-LONGEVITY-EXERCISE-ART-NYTSF

BC-WELL-LONGEVITY-EXERCISE-ART-NYTSF -- Seniors in a workout class at Asphalt Green in New York, Nov. 7, 2017. (Michelle V. Agins/The New York Times) -- FOR USE ONLY WITH WELL STORY SLUGGED BC-WELL-LONGEVITY-EXERCISE-ART-NYTSF BY Gretchen Reynolds. ALL OTHER USE PROHIBITED. --