Impact of parity on biomechanical risk factors for knee OA initiation
Autor: | Katherine A. Boyer, Bekah P. Stein |
---|---|
Rok vydání: | 2021 |
Předmět: |
Adult
Male medicine.medical_specialty Significant group Biophysics Osteoarthritis Physical function 03 medical and health sciences 0302 clinical medicine Pregnancy Risk Factors Humans Medicine Orthopedics and Sports Medicine Heel strike business.industry Rehabilitation Repeated measures design 030229 sport sciences Middle Aged Osteoarthritis Knee Pregnant female medicine.disease Biomechanical Phenomena Preferred walking speed Parity Physical therapy Female business 030217 neurology & neurosurgery |
Zdroj: | Gait & Posture. 84:287-292 |
ISSN: | 0966-6362 |
Popis: | Background Women are twice as likely as men to develop knee osteoarthritis (OA), and with it experience greater losses of physical function and disability. A change in the mechanical environment of the joint is a key initiating factor for knee OA. Differences in morphology, joint injury risk, and hormonal shifts in mid-life are often considered factors which increase OA risk for women. Pregnancy, a time of significant hormonal, morphological, and biomechanical change, has received comparably less attention. If morphological and biomechanical changes persist postpartum, this could increase OA risk for parous (childbearing) women. Research question Are lower limb gait mechanics different between healthy nulliparous (non-childbearing) and parous (childbearing) women? Methods Twenty-eight self-reported not pregnant female participants (14 parous, 14 nulliparous) were recruited for the study. Nulliparous participants had never given birth to a child. Parous participants had given birth to at least one full-term infant (37–42 weeks) without complications between one to five years before data collection. Motion capture of participants’ preferred, fast, and set (1.4 m/s) walking speeds was conducted. Repeated measures ANOVA were performed to test for significant group differences in joint kinematics and kinetics. Results There was a significant main effect of group indicating a larger knee flexion angle at toe off (p = 0.0002), smaller knee extension moment at heel strike (p = 0.0006), smaller first peak knee flexion moment (p = 0.040), and smaller peak hip adduction moment for the parous group compared to the nulliparous group (p = 0.003). Static Q-angle did not differ between groups. Significance Alteration in mechanics from the habitual loading pattern are thought to increase risk of OA. Smaller knee moments in post-partum women could alter the mechanical stimulus to cartilage, and should be investigated in conjunction with cartilage health measures to determine the link with OA initiation. |
Databáze: | OpenAIRE |
Externí odkaz: |