Table of contents

Original research

• Single leg hop for distance symmetry masks lower limb biomechanics: time to discuss hop distance as decision criterion for return to sport after ACL reconstruction? (9 March, 2021) Free

  Argyro Kotsifaki, Rod Whiteley, Sam Van Rossom, Vasileios Korakakis, Roald Bahr, Vasileios Sideris, Philip Graham-Smith, Ilse Jonkers
• A 4-year study of hamstring injury outcomes in elite track and field using the British Athletics rehabilitation approach (14 April, 2021) Free

  Noel Pollock, Shane Kelly, Justin Lee, Ben Stone, Michael Giakoumis, George Polglass, James Brown, Ben MacDonald
• SARS-CoV-2 infection and return to play in junior competitive athletes: is systematic cardiac screening needed? (29 November, 2021)

  Luna Cavigli, Michele Cillis, Veronica Mochi, Federica Frascaro, Nicola Mochi, Arnel Hajdarevic, Alessandra Roselli, Massimo Capitani, Federico Alvino, Silvia Giovani, Corrado Lisi, Maria Teresa Cappellini, Rosa Anna Colloca, Giulia Elena Mandoli, Serafina Valente, Marta Focardi, Matteo Cameli, Marco Bonifazi, Flavio D'Ascenzi
• Is early activity resumption after paediatric concussion safe and does it reduce symptom burden at 2 weeks post injury? The Pediatric Concussion Assessment of Rest and Exertion (PedCARE) multicentre randomised clinical trial (26 November, 2021)

  Andrée-Anne Ledoux, Nick Barrowman, Vid Bijelić, Michael M Borghese, Adrienne Davis, Sarah Reid, Gurinder Sangha, Keith Owen Yeates, Mark S Tremblay, Candice McGahern, Kevin Belanger, Joel D Barnes, Ken J Farion, Carol A DeMatteo, Nick Reed, Roger Zemek