Footwear traction and lower extremity non-contact injury

Wannop, John

Footwear traction and lower extremity non-contact injury

atmire.migration.oldid	228
dc.contributor.advisor	Stefanyshyn, Darren
dc.contributor.author	Wannop, John
dc.date.accessioned	2012-08-21T22:49:20Z
dc.date.available	2012-11-13T08:01:15Z
dc.date.issued	2012-08-21
dc.date.submitted	2012	en
dc.description.abstract	For the past forty years footwear traction has been thought to be one of the causes of non-contact lower extremity injury in sport. Previous studies have shown that rotational traction was associated with ACL injury, however, no studies have determined the relationship between footwear traction, both translational and rotational, and all lower extremity non-contact injuries. Therefore, the purposes of this thesis were to 1) determine if a relationship exists between an athlete’s specific footwear traction (both translational and rotational) and lower extremity non-contact injury and 2) determine how independently altering translational and rotational traction affects ankle and knee joint loading. Over the course of three years, 555 athletes had their footwear traction tested on the actual playing surface; either an artificial or natural grass field. The athletes were followed over each season and any injury that they sustained during a game was recorded by certified athletic therapists on site at the field. No differences in injury rate were seen between the artificial and natural grass surfaces. A relationship was found between rotational traction and lower extremity non-contact injury, with increases in rotational traction leading to an increase in injury rate. A relationship was also seen between translational traction and injury with the mid-range of translational traction leading to a higher injury rate. To determine how translational and rotational traction affect injury mechanism, three shoes were constructed that had independent alterations in translational and rotational traction. The footwear conditions consisted of a control shoe, a low rotational traction shoe and a high translational traction shoe. Joint loading was calculated with inverse dynamics on 10 athletes performing a v-cut and an s-cut movement in the three footwear conditions. The results indicate that both rotational traction as well as translational traction can affect the ankle and knee joint loading during football related movements. Coupled with the results of the injury study, although less clear for translational traction, it is believed that these increases in joint loading (joint moments and angular impulses) in the transverse and frontal plane are one of the possible mechanisms in terms of lower extremity non-contact injury.	en_US
dc.identifier.citation	Wannop, J. (2012). Footwear traction and lower extremity non-contact injury (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/26204	en_US
dc.identifier.doi	http://dx.doi.org/10.11575/PRISM/26204
dc.identifier.uri	http://hdl.handle.net/11023/156
dc.language.iso	eng
dc.publisher.faculty	Graduate Studies
dc.publisher.faculty	Kinesiology
dc.publisher.institution	University of Calgary	en
dc.publisher.place	Calgary	en
dc.rights	University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject	Engineering--Biomedical
dc.subject.classification	Footwear	en_US
dc.subject.classification	Traction	en_US
dc.subject.classification	injury	en_US
dc.subject.classification	Non-Contact	en_US
dc.subject.classification	Football	en_US
dc.title	Footwear traction and lower extremity non-contact injury
dc.type	doctoral thesis
thesis.degree.grantor	University of Calgary
thesis.degree.name	Doctor of Philosophy (PhD)
ucalgary.item.requestcopy	true