Award Date
8-1-2022
Degree Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
Department
Kinesiology and Nutrition Sciences
First Committee Member
Julia Freedman Silvernail
Second Committee Member
John Mercer
Third Committee Member
Richard Tandy
Fourth Committee Member
Jefferson Kinney
Number of Pages
106
Abstract
PURPOSE: 1) To determine the relationship between gait mechanics and physical activity after anterior cruciate ligament reconstruction. 2) To explore the relationships between methods of physical activity measurement, gait mechanics, and knee functional questionnaires. METHODS: Individuals were separated into two groups based on history of unilateral anterior cruciate ligament reconstruction (ACLR): ACLR (n=13; 6 M, 7 F; 37±12 years), a minimum of one year following surgery and healthy controls with no history of ACL injury or surgery CON (n=16; 7 M, 9 F; 31±11 years). Participants were asked to complete questionnaires on their physical activity level and knee function. Then three-dimensional kinetics and kinematics were collected at preferred (ACLR: 1.18 m/s; CON: 1.32 m/s) and controlled (1.35 m/s ±5%) speeds. Finally, participants wore an activity monitor for one week. For study 1: Simple linear regression analyses were conducted to determine if objectively measured weekly volume of moderate-to-vigorous physical activity predicted peak knee flexion angle, peak knee extension moment, and peak knee abduction moment during walking in individuals with and without a history of anterior cruciate ligament reconstruction. For study 2: Pearson product-moment correlations were conducted to determine the relationships between physical activity measurement type, knee mechanics, and subjective knee function questionnaires. RESULTS: Study 1: Weekly volume of moderate-to-vigorous physical activity statistically significantly predicted peak knee flexion angle at preferred and controlled speeds and peak knee extension moment at a preferred speed in individuals with history of anterior cruciate ligament reconstruction (p < .05). Study 2: Weekly volume of moderate to-vigorous physical activity measured by seven days of Fitbit wear was negatively correlated with knee flexion angle (p
Keywords
activity monitoring; kinematics; kinetics
Disciplines
Biomechanics | Kinesiology | Medicine and Health Sciences
File Format
File Size
796 KB
Degree Grantor
University of Nevada, Las Vegas
Language
English
Repository Citation
Kelly, Devin Kathleen, "Influence of Physical Activity After ACL Reconstruction on Gait: Implications for the Development of Knee Osteoarthritis" (2022). UNLV Theses, Dissertations, Professional Papers, and Capstones. 4511.
http://dx.doi.org/10.34917/33690284
Rights
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