Duke Health published a study that states physical declines begin sooner in life than typically detected, often when people are still in their 50's. The study focused on a large group of US adults across a variety of age groups. The findings suggest efforts to maintain basic strength and endurance should begin before age 50 when its till possible to preserve the skills that keep people mobile and independent in life. 775 participants enrolled in the longitudinal clinical study based in Annapolis, NC. Katherine S Hall, PhD., Harvey Cohen, Carl Pieper, Gerda Filenbaum, William Krause, Kim Huffman, Melissa Cornish, Adrew Shiloh, Christy Flynn, Richard Sloane and L. Kristin Newby.