Jonathon Sullivan Jonathon Sullivan MD, PhD, SSC, is focused on the use of strength training in middle-aged and elderly populations as a way to improve function and fight the diseases of aging: sarcopenia, osteopenia and metabolic syndrome. His coaching practice, Grey Steel Strength and Conditioning, is located in Farmington, Michigan. Podcasts Episode 26 - Barbell Prescription with Jonathon Sullivan Go to Jonathon Sullivan MD, PhD, SSC's author page
