Table of contents

Original articles

• Head injuries in professional male football (soccer) over 13 years: 29% lower incidence rates after a rule change (red card) (23 June, 2017)

  Florian Beaudouin, Karen aus der Fünten, Tobias Tröß, Claus Reinsberger, Tim Meyer
• Review of criterion-referenced standards for cardiorespiratory fitness: what percentage of 1 142 026 international children and youth are apparently healthy? (2 March, 2017)

  Justin J Lang, Mark S Tremblay, Francisco B Ortega, Jonatan R Ruiz, Grant R Tomkinson
• Epidemiology and return to play following isolated syndesmotic injuries of the ankle: a prospective cohort study of 3677 male professional footballers in the UEFA Elite Club Injury Study (21 December, 2017) Free

  Bart Lubberts, Pieter D’Hooghe, Håkan Bengtsson, Christopher W DiGiovanni, James Calder, Jan Ekstrand
• ACL and meniscal injuries increase the risk of primary total knee replacement for osteoarthritis: a matched case–control study using the Clinical Practice Research Datalink (CPRD) (13 January, 2018)

  Tanvir Khan, Abtin Alvand, Daniel Prieto-Alhambra, David J Culliford, Andrew Judge, William F Jackson, Brigitte E Scammell, Nigel K Arden, Andrew James Price
• On average, a professional rugby union player is more likely than not to sustain a concussion after 25 matches (12 March, 2018)

  James Rafferty, Craig Ranson, Giles Oatley, Mohamed Mostafa, Prabhat Mathema, Tom Crick, Isabel S Moore