biological aging

Long-term physical activity is a hallmark recommendation physicians make to patients for a long, healthy life.

"Historically viewed as mainly a “wear and tear” condition, new insights suggest that OA may be part of an evolutionary, age-related biological process rather than mainly driven by mechanical damage."

While the study  describes modeling based upon a limited population and annual memory-limited food recall, it is based upon recognizing the complexity that most nutritional studies avoid.