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Ryan G. Timmins, Baubak Shamim, Paul J. Tofari, Jack T. Hickey and Donny M. Camera

Hamstring strain injuries (HSIs) are the most prevalent, noncontact injury in sports, which involve high-speed running, with more than 80% of these occurring within the biceps femoris long head (BFlh). 1 These injuries also present a significant financial burden for the athlete and their sporting

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Siobhán O’Connor, Noel McCaffrey, Enda F. Whyte, Michael Fop, Brendan Murphy and Kieran A. Moran

footballers have been shown to cover a mean distance of 5732 (1047) m and 8160 (1482) m during a match, respectively. 4 , 5 Elite players spend approximately a quarter of a match running and sprinting. 5 Hamstring injuries are a leading cause of injury in adolescent and collegiate Gaelic games, accounting

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Benjamin Drury, Thomas Green, Rodrigo Ramirez-Campillo and Jason Moran

hamstring strength via performing the Nordic hamstring exercise (NHE). Its inclusion as an injury prevention exercise is supported due to its ability to greatly reduce hamstring injuries. 6 For example, in elite soccer players, high levels of eccentric hamstring strength have been shown to reduce the risk

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Özlem Aslan, Elif Balevi Batur and Jale Meray

-extremity, which occur during the daily life activities, such as stair climbing in, stool climbing, and/or chair sitting. For instance, eccentric hamstring contraction with concentric quadriceps contraction occurs during leg extension. Conversely, concentric hamstring contraction with eccentric quadriceps

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Mathieu Lacome, Simon Avrillon, Yannick Cholley, Ben M. Simpson, Gael Guilhem and Martin Buchheit

Over the past 10 years, total sprint distance (∼35%) and the number of sprints (∼85%) have moderately-to-largely increased in the English Premier League, suggesting the increased stress placed on the posterior chain muscle groups. 1 Together with this increased neuromuscular demand, the hamstring

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Jeffrey G. Williams, Hannah I. Gard, Jeana M. Gregory, Amy Gibson and Jennifer Austin

In college soccer, 53% of injuries are muscular in nature. 1 Of all muscular injuries, 47% of strains involve the hamstring muscle group, 2 making hamstring injuries the most common injuries among soccer players. 1 , 3 Such findings of hamstring injury among this population are likely due to the

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Gulcan Harput, Volga B. Tunay and Matthew P. Ithurburn

subsequent physical activity, several musculoskeletal impairments are observed during rehabilitation, including deficits in knee range of motion, 3 knee joint laxity, 4 and, most commonly, quadriceps and hamstring muscle weakness. 5 – 8 Often, strength recovery of the involved limb quadriceps and

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Mary Lynn Manduca and Stephen J. Straub

Clinical Scenario Muscle injuries account for 30% to 50% of all athletic injuries, 1 with hamstring strains accounting for 15%. 2 Hamstring injuries are particularly common in endurance sports, soccer, rugby, hockey, football, and track—which has been attributed to the explosive and decelerating

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Nicolas Babault, Wacef Bazine, Gaëlle Deley, Christos Paizis and Grégory Lattier

Purpose:

To examine the acute effect of a single static-stretching session of hamstring muscles on torque production in relation with individual flexibility.

Methods:

Maximal voluntary concentric torque of hamstring muscles was measured before and after a static-stretching session (6 × 30 s). Torque changes were correlated with the flexibility level determined at the onset of the experimental procedure.

Results:

The hamstring-stretching intervention significantly reduced maximal concentric torque in participants with low and high hamstring flexibility. Hamstring flexibility and torque decrease, determined immediately after the stretching procedure, were negatively correlated.

Conclusions:

Torque decrease measured after the static-stretching session is dependent on participant flexibility. Participants with low flexibility are much more likely to demonstrate large torque decreases poststretching.

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Zachary K. Winkelmann, Ethan J. Roberts and Kenneth E. Games

Injuries to the hamstring muscles are common in sports and cause significant loss of competition and training time. 1 Hamstring injuries also affect the quality of life of athletes. 1 Muscle injury and inadequate flexibility have been strongly correlated, especially with respect to the hamstring