TY - JOUR
T1 - Sex differences in running mechanics and patellofemoral joint kinetics following an exhaustive run
AU - Willson, John D.
AU - Loss, Justin R.
AU - Willy, Richard W.
AU - Meardon, Stacey A.
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/11/26
Y1 - 2015/11/26
N2 - Patellofemoral joint pain (PFP) is a common running-related injury that is more prevalent in females and thought to be associated with altered running mechanics. Changes in running mechanics have been observed following an exhaustive run but have not been analyzed relative to the sex bias for PFP. The purpose of this study was to test if females demonstrate unique changes in running mechanics associated with PFP following an exhaustive run. For this study, 18 females and 17 males ran to volitional exhaustion. Peak PFJ contact force and stress, PFJ contact force and stress loading rates, hip adduction excursion, and hip and knee joint frontal plane angular impulse were analyzed between females and males using separate 2 factor ANOVAs (2 (male/female)×2 (before/after exhaustion)). We observed similar changes in running mechanics among males and females over the course of the exhaustive run. Specifically, greater peak PFJ contact force loading rate (5%, P=.01), PFJ stress loading rate (5%, P<.01), hip adduction excursion (1.3°, P<.01), hip abduction angular impulse (4%, P<.01), knee abduction angular impulse (5%, P=.03), average vertical ground reaction force loading rate (10%, P<.01) and step length (2.1. cm, P=.001) were observed during exhausted running. These small changes in suspected PFP pathomechanical factors may increase a runner's propensity for PFP. However, unique changes in female running mechanics due to exhaustion do not appear to contribute to the sex bias for PFP.
AB - Patellofemoral joint pain (PFP) is a common running-related injury that is more prevalent in females and thought to be associated with altered running mechanics. Changes in running mechanics have been observed following an exhaustive run but have not been analyzed relative to the sex bias for PFP. The purpose of this study was to test if females demonstrate unique changes in running mechanics associated with PFP following an exhaustive run. For this study, 18 females and 17 males ran to volitional exhaustion. Peak PFJ contact force and stress, PFJ contact force and stress loading rates, hip adduction excursion, and hip and knee joint frontal plane angular impulse were analyzed between females and males using separate 2 factor ANOVAs (2 (male/female)×2 (before/after exhaustion)). We observed similar changes in running mechanics among males and females over the course of the exhaustive run. Specifically, greater peak PFJ contact force loading rate (5%, P=.01), PFJ stress loading rate (5%, P<.01), hip adduction excursion (1.3°, P<.01), hip abduction angular impulse (4%, P<.01), knee abduction angular impulse (5%, P=.03), average vertical ground reaction force loading rate (10%, P<.01) and step length (2.1. cm, P=.001) were observed during exhausted running. These small changes in suspected PFP pathomechanical factors may increase a runner's propensity for PFP. However, unique changes in female running mechanics due to exhaustion do not appear to contribute to the sex bias for PFP.
KW - Exertion
KW - Female
KW - Kinematics
KW - Male
KW - Patella
UR - http://www.scopus.com/inward/record.url?scp=84952838227&partnerID=8YFLogxK
U2 - 10.1016/j.jbiomech.2015.10.021
DO - 10.1016/j.jbiomech.2015.10.021
M3 - Article
C2 - 26525514
AN - SCOPUS:84952838227
SN - 0021-9290
VL - 48
SP - 4155
EP - 4159
JO - Journal of Biomechanics
JF - Journal of Biomechanics
IS - 15
ER -