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Home   Clinicians Blog   Foot Strike Posture and Lower-Limb Dynamics During Sidestepping Among Elite Female Athletes: Implications for ACL Injury Risk

Foot Strike Posture and Lower-Limb Dynamics During Sidestepping Among Elite Female Athletes: Implications for ACL Injury Risk

Abstracts

Abstracts

The purpose of the study was to examine and compare dynamics of the lower limbs between forefoot (FF) and rearfoot (RF) strike patterns during unplanned sidestepping.

Movement patterns of sixteen elite female hockey players were recorded with the use of a 12 camera Vicon MX system.

Each participant performed a series of planned and unplanned straight line and change of direction running tasks.

Based on the natural foot strike patterns, participants were classified into two strike groups - a) habitual rearfoot (RF) b) habitual forefoot (FF).


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Hip, knee and ankle joint angles, moments, and net power were calculated during the weight acceptance (WA) phase of unplanned sidestepping in accordance with the phase definition approach to the greatest risk of ACL injury.

The RF strike group were dorsiflexed at IC as compared with the plantar-flexed posture of the FF strike.

On average, the hip at IC was 10° more flexed in the RF group when compared with the FF-fall group.

Ankle joint flexion range-of-motion following initial foot contact for the FF strikers was 42% higher than the RF strikers.

Peak extension ankle moments were significantly (143%) higher in the FF strikers as compared to the RF group.

The RF strikers peak knee extension moments were 22% higher than the FF striking group.

Peak knee valgus moments in the RF strike group were found to be significantly elevated (64%) relative to the FF strikers.

FF strike negative net peak ankle joint power (absorption) was 62% higher than the RF group.

Negative net peak knee joint power was 53% greater among the RF group as compared to the FF group.

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References: 
  1. Chamnan Chinnasee, Gillian Weir, Jacqueline Alderson, Siriporn Sasimontonkul and Cyril J Donnelly (2015) Foot Strike Posture and Lower-Limb Dynamics During Sidestepping Among Elite Female Athletes: Implications for ACL Injury Risk. 33rd International Conference on Biomechanics in Sports, France: June 29 - July 3, 2015
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