Int J Sports Med 2020; 41(06): 412-418
DOI: 10.1055/a-1088-5467
Orthopedics & Biomechanics
© Georg Thieme Verlag KG Stuttgart · New York

Patellofemoral Joint Stress during Running with Added Load in Females

Molly Kujawa
1   Department of Health Professions, University of Wisconsin-La Crosse, La Crosse, United States
,
Aleyna Goerlitz
1   Department of Health Professions, University of Wisconsin-La Crosse, La Crosse, United States
,
Drew Rutherford
1   Department of Health Professions, University of Wisconsin-La Crosse, La Crosse, United States
,
Thomas W. Kernozek
1   Department of Health Professions, University of Wisconsin-La Crosse, La Crosse, United States
› Author Affiliations
Funding: University of Wisconsin - La Crosse Graduate Studies for their partial funding in support of this project.
Further Information

Publication History



accepted 25 December 2019

Publication Date:
11 February 2020 (online)

Abstract

Patellofemoral joint (PFJ) pain syndrome is a commonly reported form of pain in female runners and military personnel. Increased PFJ stress may be a contributing factor. Few studies have examined PFJ stress running with added load. Our purpose was to analyze PFJ stress, PFJ reaction force, quadriceps force, knee flexion angle, and other kinematic and temporospatial variables running with and without a 9 kg load. Nineteen females ran across a force platform with no added load and 9.0 kg weight vest. Kinematic data were collected using 3D motion capture and kinetic data with a force platform. Muscle forces were estimated using a musculoskeletal model, and peak PFJ loading variables were calculated during stance. Multivariate analyses were run on PFJ loading variables and on cadence, step length and foot strike index. Differences were shown in PFJ stress, PFJ reaction force, peak knee flexion angle and quadriceps force. Joint specific kinetic variables increased between 5–16% with added load. PFJ loading variables increased with 9 kg of added load without changes in cadence, step length, or foot strike index compared to no load. Added load appears to increase the PFJ loading variables associated with PFJ pain in running.

 
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