Biomechanical Measures During Two Sport-Specific Tasks Differentiate Between Soccer Players Who Go on to Anterior Cruciate Ligament Injury and Those Who Do Not: A Prospective Cohort Analysis

Dix, Celeste; Arundale, Amelia; Silvers-Granelli, Holly; Marmon, Adam R.; Zarzycki, Ryan; Snyder‐Mackler, Lynn

doi:10.26603/ijspt20200928

Cited by 29 publications

(33 citation statements)

References 32 publications

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“…21,30,31 In this study, the intervention group demonstrated a 7.1° decrease in knee valgus collapse. 27 Although this change did not reach statistical significance, it did exceed the SDC of 6.4°, indicating this is likely a true biomechanical change. So, this decrease in valgus collapse in the non-dominant limb may indicate a positive biomechanical effect of the 11+.…”

Section: Discussionmentioning

confidence: 89%

“…Changes in kinematic variables were compared to previously published smallest detectable change (SDC) and minimal important difference (MID) values for the 90° cut to determine whether they were clinically relevant. 27 Changes exceeding statistical significance (p<0.05) will be referred to as 'statistically significant', and changes exceeding the MID will be referred to as 'clinically meaningful'. An a priori power analysis using preseason data of 31 subjects was completed, and indicated that to detect a change in dominant limb peak knee abduction angle that exceeded the MID of 2.0º (standard deviation: 3.09º) with power=0.80, 30 subjects would be needed.…”

Section: Discussionmentioning

confidence: 99%

“…There was a significant interaction effect for non-dominant hip adduction angle (p=0.03) (Table 3), but changes in nondominant hip adduction angle did not exceed the SDC. 27 There was a main effect of time for dominant hip internal rotation angle (p<0.01). Dominant hip internal rotation angle decreased from preseason to postseason, and this change exceeded the SDC in both groups.…”

Section: Hip Kinematicsmentioning

confidence: 91%

“…Three trials without errors were collected on both the right and left limbs, but only the second and third trials were analyzed secondary to higher reliability. 27 Limb dominance was defined as the self-reported preferred kicking leg.…”

Section: Methodsmentioning

confidence: 99%

“…There were no other significant interactions or main effects that exceeded the SDC or MID for hip frontal and transverse plane variables. 27…”

Section: Hip Kinematicsmentioning

confidence: 99%

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Biomechanical Changes During a 90º Cut in Collegiate Female Soccer Players With Participation in the 11+

Dix

Arundale

Silvers-Granelli

et al. 2021

International Journal of Sports Physical Therapy

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BackgroundValgus collapse and high knee abduction moments have been identified as biomechanical risk factors for ACL injury. It is unknown if participation in the 11+, a previously established, dynamic warm-up that emphasizes biomechanical technique and reduces ACL injury rates, reduces components of valgus collapse during a 90º cut. Hypothesis/PurposeTo determine whether participation in the 11+ during a single soccer season reduced peak knee abduction moment and components of valgus collapse during a 90º cut in collegiate female soccer players. Study Design Prospective cohort study MethodsForty-six participants completed preseason and postseason motion analysis of a 90º cut. During the season, 31 players completed the 11+ and 15 players completed their typical warm-up (control group). Peak knee abduction moment, components of valgus collapse (hip adduction, internal rotation, and knee abduction angles), and a novel measure of knee valgus collapse were analyzed with repeated-measures ANOVAs to determine differences between preseason and postseason. Smallest detectable change (SDC) and minimal important difference (MID) values were applied to contextualize results. ResultsThere was a significant main effect of time for non-dominant knee valgus collapse (p=0.03), but decreases in non-dominant knee valgus collapse only exceeded the SDC in the intervention team. ConclusionsClinically meaningful decreases in knee valgus collapse may indicate a beneficial biomechanical effect of the 11+. Participation in the 11+ may lower ACL injury risk by reducing valgus collapse during a 90º cut.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Hip Kinematicsmentioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

“…There were no other significant interactions or main effects that exceeded the SDC or MID for hip frontal and transverse plane variables. 27…”

Section: Hip Kinematicsmentioning

confidence: 99%

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Biomechanical Changes During a 90º Cut in Collegiate Female Soccer Players With Participation in the 11+

Dix

Arundale

Silvers-Granelli

et al. 2021

International Journal of Sports Physical Therapy

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Return to Sport After ACL Injury

Zaffagnini,

Di Paolo,

Agostinone

et al. 2024

Sports Injuries

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A 2D video-analysis scoring system of 90° change of direction technique identifies football players with high knee abduction moment

Villa¹,

Paolo

Santagati³

et al. 2021

Knee Surg Sports Traumatol Arthrosc

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Purpose Abnormal joint biomechanics and poor neuromuscular control are modifiable risk factors for Anterior Cruciate Ligament (ACL) injury. Although 3D motion capture is the gold standard for the biomechanical evaluation of high-speed multidirectional movements, 2D video analysis is a growing-interest alternative because of its higher cost-effectiveness and interpretability. The aim of the present study was to explore the possible association between a 2D evaluation of a 90° change of direction (COD) and the KAM measured with gold standard 3D motion analysis. Methods Thirty-four competitive football (soccer) players (age 22.8 ± 4.1, 18 male and 16 females) were enrolled. Each athlete performed a series of pre-planned 90° COD at the maximum speed possible in a laboratory equipped with artificial turf. 3D motion analysis was recorded using 10 stereophotogrammetric cameras, a force platform, and three high-speed cameras. The 2D evaluation was performed through a scoring system based on the video analysis of frontal and sagittal plane joint kinematics. Five scoring criteria were adopted: limb stability (LS), pelvis stability (PS), trunk stability (TS), shock absorption (SA), and movement strategy (MS). For each criterion, a sub-score of 0/2 (non-adequate), 1/2 (partially adequate), or 2/2 (adequate) was attributed to the movement, based on objective measurements. The intra-rater and inter-rater reliability were calculated for each criterion and the total score. The Knee Abduction Moment (KAM) was extracted from the 3D motion analysis and grouped according to the results of the 2D evaluation. Results Excellent intra-rater reliability (ICC > 0.88) and good-to-excellent inter-rater reliability (ICC 0.68–0.92) were found. Significantly higher KAM was found for athletes obtaining a 0/2 score compared to those obtaining a 2/2 score in all the sub-criteria and the total score (20–47% higher, p < 0.05). The total score and the LS score showed the best discriminative power between the three groups. Conclusion The 2D video-analysis scoring system here described was a simple and effective tool to discriminate athletes with high and low KAM in the assessment of a 90° COD and could be a potential method to identify athletes at high risk of non-contact ACL injury. Level of evidence IV.

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Biomechanical Measures During Two Sport-Specific Tasks Differentiate Between Soccer Players Who Go on to Anterior Cruciate Ligament Injury and Those Who Do Not: A Prospective Cohort Analysis

Cited by 29 publications

References 32 publications

Biomechanical Changes During a 90º Cut in Collegiate Female Soccer Players With Participation in the 11+

Biomechanical Changes During a 90º Cut in Collegiate Female Soccer Players With Participation in the 11+

Return to Sport After ACL Injury

A 2D video-analysis scoring system of 90° change of direction technique identifies football players with high knee abduction moment

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