title: Reply from Ross D. Pollock, Norman R. Lazarus, Janet M. Lord and Stephen D. R. Harridge.
authors.affiliation: Centre of Human and Aerospace Physiological Sciences, King's College London, Shepherds House, Guy's Campus, London, SE1 1UL, UK. ross.pollock@kcl.ac.uk.
authors.forename: Ross D
authors.initials: RD
authors.lastname: Pollock
authors.affiliation: Centre of Human and Aerospace Physiological Sciences, King's College London, Shepherds House, Guy's Campus, London, SE1 1UL, UK.
authors.forename: Norman R
authors.initials: NR
authors.lastname: Lazarus
authors.affiliation: MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, B15 2TT UK.
authors.forename: Janet M
authors.initials: JM
authors.lastname: Lord
authors.affiliation: Centre of Human and Aerospace Physiological Sciences, King's College London, Shepherds House, Guy's Campus, London, SE1 1UL, UK.
authors.forename: Stephen D R
authors.initials: SD
authors.lastname: Harridge
mesh_terms: D000375:Aging / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity