Reflections on four decades of physical activity epidemiology

• Barbara Sternfeld,
• David R. Jacobs, Jr.

Affiliations

Barbara Sternfeld

Division of Research, Kaiser Permanente Northern California, Oakland, CA 94610, USA; Corresponding author.

David R. Jacobs, Jr.

Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN 55454, USA