[1] N Manchester Grp Hosp, Dept Physiotherapy, Manchester M8 5RB, Lancs, England
[2] Univ Manchester, Manchester Royal Infirm, Ctr Rehabil Sci, Manchester M13 9WL, Lancs, England
[3] Leicester Gen Hosp, Univ Dept Anaesthesia Crit Care & Pain Management, Leicester LE5 4PW, Leics, England
[4] Manchester Metropolitan Univ, MMU Cheshire, Dept Exercise & Sport Sci, Inst Biophys & Clin Res Human Movement, Alsager, England