RT Journal Article SR Electronic T1 Physical activity self-reports: past or future? JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 889 OP 890 DO 10.1136/bjsports-2020-103595 VO 55 IS 16 A1 Matteo C Sattler A1 Barbara E Ainsworth A1 Lars B Andersen A1 Charlie Foster A1 Maria Hagströmer A1 Johannes Jaunig A1 Paul Kelly A1 Harold W Kohl III A1 Charles E Matthews A1 Pekka Oja A1 Stephanie A Prince A1 Mireille N M van Poppel YR 2021 UL http://bjsm.bmj.com/content/55/16/889.abstract AB