1 Title: Measuring physical performance in highly active older adults: Associations with age 1 and gender? 2 3 Tangen, Gro Gujord, PT, PhD. 1,2,3 4 Robinson, Hilde Stendal, PT, PhD. 1 5 1 Department of Health Sciences, Institute of Health and Society, University of Oslo, Norway 6 2 Norwegian National Advisory Unit on Ageing and Health, Vestfold Hospital Trust, Norway 7 3 Department of Geriatric Medicine, Oslo University Hospital, Norway 8 9 H.S.Robinson: phone +4790607081, email: h.s.robinson@medisin.uio.no 10 11 Corresponding author: Gro Gujord Tangen, Department of Health Sciences, Institute of 12 Health and Society, University of Oslo, P.O. Box 1089, Blindern, 0317 Oslo, Norway. 13 E-mail: g.g.tangen@medisin.uio.no, phone : +4790529274. 14 Orcid: 0000-0002-9417-2799 15 16 Word count manuscript text: 3556 17 18