Greater loss of horizontal force after a repeated-sprint test in footballers with a previous hamstring injury

Lord, Cameron; Blazevich, Anthony J.; Drinkwater, Eric J.; Ma’ayah, Fadi

doi:10.1016/j.jsams.2018.06.008

Cited by 13 publications

(15 citation statements)

References 25 publications

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“…Previous researchers 32 have also shown that injury rates increase with the accumulation of fatigue and have negative effects on biomechanics. Full recovery can take several days.…”

Section: Discussionmentioning

confidence: 93%

“…Fatigued muscles in the lower extremity require less force to reach muscle failure under high-intensity eccentricloading conditions 29,30 and to display negative effects on lower extremity biomechanics and neuromuscular fatigue. 31,32 Phototherapeutic effects linked to reinforcement of microcirculation, 33 enhanced adenosine triphosphate synthesis, 34 and mitochondrial function 35 have been observed after exposure to light. Reduced reactive oxygen species release and creatine phosphokinase activity and increased production of antioxidants and heat shock proteins have also been reported after PBM.…”

Section: Discussionmentioning

confidence: 99%

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Phototherapy for Improvement of Performance and Exercise Recovery: Comparison of 3 Commercially Available Devices

Marchi

Schmitt

Fabro

et al. 2017

Journal of Athletic Training

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“…Previous researchers 32 have also shown that injury rates increase with the accumulation of fatigue and have negative effects on biomechanics. Full recovery can take several days.…”

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Phototherapy for Improvement of Performance and Exercise Recovery: Comparison of 3 Commercially Available Devices

Marchi

Schmitt

Fabro

et al. 2017

Journal of Athletic Training

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show abstract

“…Furthermore, some studies suggest that sports-active persons are left with persistent functional deficits, such as reduced muscle strength (especially of the eccentric component), 10,52 muscle fatigue, and changes in the muscular activation after a hamstring strain injury. 9,38 Whether these functional deficits can be restored has not been examined.…”

mentioning

confidence: 99%

Chronic Sequelae After Muscle Strain Injuries: Influence of Heavy Resistance Training on Functional and Structural Characteristics in a Randomized Controlled Trial

et al. 2021

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Background: Muscle strain injury leads to a high risk of recurrent injury in sports and can cause long-term symptoms such as weakness and pain. Scar tissue formation after strain injuries has been described, yet what ultrastructural changes might occur in the chronic phase of this injury have not. It is also unknown if persistent symptoms and morphological abnormalities of the tissue can be mitigated by strength training. Purpose: To investigate if heavy resistance training improves symptoms and structural abnormalities after strain injuries. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: A total of 30 participants with long-term weakness and/or pain after a strain injury of the thigh or calf muscles were randomized to eccentric heavy resistance training of the injured region or control exercises of the back and abdominal muscle. Isokinetic (hamstring) or isometric (calf) muscle strength was determined, muscle cross-sectional area measured, and pain and function evaluated. Scar tissue ultrastructure was determined from biopsy specimens taken from the injured area before and after the training intervention. Results: Heavy resistance training over 3 months improved pain and function, normalized muscle strength deficits, and increased muscle cross-sectional area in the previously injured region. No systematic effect of training was found upon pathologic infiltration of fat and blood vessels into the previously injured area. Control exercises had no effect on strength, cross-sectional area, or scar tissue but a positive effect on patient-related outcome measures, such as pain and functional scores. Conclusion: Short-term strength training can improve sequelae symptoms and optimize muscle function even many years after a strain injury, but it does not seem to influence the overall structural abnormalities of the area with scar tissue. Registration: NCT02152098 (ClinicalTrials.gov identifier).

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“…A range of variables were evaluated, including GRFs, three-dimensional (3D) trunk, pelvis and lower-limb joint angles, sagittal plane lower-limb joint moments, as well as sEMG activity for the hamstrings along with other hip and trunk muscles. Overall, six studies reported differences in sprinting biomechanics variables of some sort [38,40,41,44,45,51], whereas five studies found no significant differences at all [39,[46][47][48]50].…”

Section: Studies Using a Between-group Designmentioning

confidence: 97%

“…Only three of the 16 studies had a low risk of bias (Table 2) [38][39][40]. These three studies involved cross-sectional analyses where sprinting biomechanics variables were compared between people with and without a history of HSI.…”

Section: Risk Of Bias Assessmentmentioning

confidence: 99%

Sprinting Biomechanics and Hamstring Injuries: Is There a Link? A Literature Review

Kalema

Schache

Williams

et al. 2021

Sports

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Hamstring strain injury (HSI) is a common and costly injury in many sports such as the various professional football codes. Most HSIs have been reported to occur during high intensity sprinting actions. This observation has led to the suggestion that a link between sprinting biomechanics and HSIs may exist. The aim of this literature review was to evaluate the available scientific evidence underpinning the potential link between sprinting biomechanics and HSIs. A structured search of the literature was completed followed by a risk of bias assessment. A total of eighteen studies were retrieved. Sixteen studies involved retrospective and/or prospective analyses, of which only three were judged to have a low risk of bias. Two other case studies captured data before and after an acute HSI. A range of biomechanical variables have been measured, including ground reaction forces, trunk and lower-limb joint angles, hip and knee joint moments and powers, hamstring muscle–tendon unit stretch, and surface electromyographic activity from various trunk and thigh muscles. Overall, current evidence was unable to provide a clear and nonconflicting perspective on the potential link between sprinting biomechanics and HSIs. Nevertheless, some interesting findings were revealed, which hopefully will stimulate future research on this topic.

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Greater loss of horizontal force after a repeated-sprint test in footballers with a previous hamstring injury

Cited by 13 publications

References 25 publications

Phototherapy for Improvement of Performance and Exercise Recovery: Comparison of 3 Commercially Available Devices

Phototherapy for Improvement of Performance and Exercise Recovery: Comparison of 3 Commercially Available Devices

Chronic Sequelae After Muscle Strain Injuries: Influence of Heavy Resistance Training on Functional and Structural Characteristics in a Randomized Controlled Trial

Sprinting Biomechanics and Hamstring Injuries: Is There a Link? A Literature Review

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