Treadmill workstations in office workers who are overweight or obese: a randomised controlled trial oleh Frida Bergman, MSc, Viktoria Wahlström, RPT, Andreas Stomby, PhD, Julia Otten, PhD, Ellen Lanthén, MD, Rebecka Renklint, MS, Maria Waling, PhD, Ann Sörlin, PhD, Carl-Johan Boraxbekk, ProfPhD, Patrik Wennberg, PhD, Fredrik Öhberg, PhD, James A Levine, ProfPhD, Tommy Olsson, ProfPhD