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Liam Anderson, Graeme L. Close, Matt Konopinski, David Rydings, Jordan Milsom, Catherine Hambly, John Roger Speakman, Barry Drust and James P. Morton

Maintaining muscle mass and function during rehabilitation from anterior cruciate ligament injury is complicated by the challenge of accurately prescribing daily energy intakes aligned to energy expenditure. Accordingly, we present a 38-week case study characterizing whole body and regional rates of muscle atrophy and hypertrophy (as inferred by assessments of fat-free mass from dual-energy X-ray absorptiometry) in a professional male soccer player from the English Premier League. In addition, in Week 6, we also quantified energy intake (via the remote food photographic method) and energy expenditure using the doubly labeled water method. Mean daily energy intake (CHO: 1.9–3.2, protein: 1.7–3.3, and fat: 1.4–2.7 g/kg) and energy expenditure were 2,765 ± 474 and 3,178 kcal/day, respectively. In accordance with an apparent energy deficit, total body mass decreased by 1.9 kg during Weeks 1–6 where fat-free mass loss in the injured and noninjured limb was 0.9 and 0.6 kg, respectively, yet, trunk fat-free mass increased by 0.7 kg. In Weeks 7–28, the athlete was advised to increase daily CHO intake (4–6 g/kg) to facilitate an increased daily energy intake. Throughout this period, total body mass increased by 3.6 kg (attributable to a 2.9 and 0.7 kg increase in fat free and fat mass, respectively). Our data suggest it may be advantageous to avoid excessive reductions in energy intake during the initial 6–8 weeks post anterior cruciate ligament surgery so as to limit muscle atrophy.

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understanding injury experiences from a career transition perspective. A 26-year-old former elite handball player who had experienced two major anterior cruciate ligament injuries during his career took part in two interviews. Through the participant’s narratives, four phases of injury transition were

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Herbert Wagner, Patrick Fuchs, Andrea Fusco, Philip Fuchs, Jeffrey W. Bell and Serge P. von Duvillard

with male players. 10 , 11 Bencke and Zebis 12 analyzed the neuromuscular preactivity during side-cutting in team handball and explained this increased risk for knee (anterior cruciate ligament) injuries by a smaller hamstring contraction force during the initial part of ground contact and, therefore

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Robert McCunn, Hugh H.K. Fullagar, Sean Williams, Travis J. Halseth, John A. Sampson and Andrew Murray

longer observation periods. References 1. Secrist E , Bhat S , Dodson C . The financial and professional impact of anterior cruciate ligament injuries in National Football League athletes . Orthop J Sports Med . 2016 ; 4 ( 8 ): 2325967116663921 . doi:10.1177/2325967116663921 10

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Oliver Gonzalo-Skok, Alejandro Moreno-Azze, José Luis Arjol-Serrano, Julio Tous-Fajardo and Chris Bishop

performance. Although between-limb asymmetries seem to have a solid support to detect players at high risk (ie, 4-fold in players with >10% asymmetry) of lower-extremity injury, 11 as well as return to sport successfully after an anterior cruciate ligament injury (2.5 greater chances), 12 the influence of

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Graeme L. Close, Craig Sale, Keith Baar and Stephane Bermon

many athletes. Nutrition to Prevent and Treat Tendon and Ligament Injuries Tendinopathy is one of the most common musculoskeletal issues in high-jerk sports. Jerk, the rate of change of acceleration, is the physical property that coaches and athletes think of as plyometric load. Where the plyometric

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Hugh H.K. Fullagar, Robert McCunn and Andrew Murray

to injury epidemiology within collegiate AF is that there appears to be a trend of increasing lower extremity injury rates. 71 Anterior Cruciate Ligament Injuries Anterior cruciate ligament (ACL) injury represents a season-ending injury within collegiate AF since the majority of NCAA and NFL

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Matthew A. Wyon, Roger Wolman, Nicolas Kolokythas, Karen Sheriff, Shaun Galloway and Adam Mattiussi

cruciate ligament injury in male and female athletes: a prospective study . Am J Sports Med . 2016 ; 44 ( 2 ): 355 – 361 . PubMed ID: 26646514 doi:10.1177/0363546515616237 26646514 10.1177/0363546515616237 25. Koutedakis Y , Khalouha M , Pacy P , Murphy M , Dunbar G . Thigh peak torques

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Mostafa Zarei, Hamed Abbasi, Abdolhamid Daneshjoo, Mehdi Gheitasi, Kamran Johari, Oliver Faude, Nikki Rommers and Roland Rössler

muscles has previously been associated with injury risk. Hip abduction strength is of importance to reduce the risk for anterior cruciate ligament injuries, 27 and lower strength of the ankle evertors has been reported in people with ankle instability and a high risk of ankle sprains. 28 Practical

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Rafael Sabido, Jose Luis Hernández-Davó and Gabriel T. Pereyra-Gerber

.1177/03635465020300020901 2. Hewett TE , Myer GD , Ford KR . Prevention of anterior cruciate ligament injuries . Curr Womens Health Rep . 2001 ; 1 ( 3 ): 218 – 224 . PubMed 12112973 3. Naczk M , Naczk A , Brzenczek-Owczarzak W , Arlet J , Adach Z . Impact of inertial training on strength and power