Does the 2D Frontal Plane Projection Angle Predict Frontal Plane Knee Moments during Stepping, Landing, and Change of Direction Tasks?
Background Although dynamic knee valgus can be visually identified using the 2D frontal plane projection angle (FPPA), the validity of the FPPA in terms of predicting frontal plane knee kinematics has been questioned. The biomechanical utility of the FPPA may lie in its ability to predict frontal pl...
| Publicado en: | International Journal of Sports Physical Therapy Vol. 17; no. 7; pp. 1259 - 1271 |
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| Autores principales: | , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
North American Journal of Sports Physical Therapy
2022
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=160916592&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 160916592 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 21592896 BKL5 jtl: International Journal of Sports Physical Therapy issn: 21592896 maglogo: N pubinfo: dt: 2022 vid: 17 iid: 7 pid: 38303 pub: North American Journal of Sports Physical Therapy place: Indianapolis, Indiana artinfo: ui: 160916592 160916592 160916592 10.26603/001c.39612 160916592 ppf: 1259 ppct: 12 formats: tig: atl: Does the 2D Frontal Plane Projection Angle Predict Frontal Plane Knee Moments during Stepping, Landing, and Change of Direction Tasks? aug: au: Straub, Powers K. Powers, Christopher M. affil: PT, PhD, FACSM, FAPTA USC Division of Biokinesiology & Physical Therapy 1540 E. Alcazar St. CHP-155 Los Angeles, CA 90089-9006 sug: subj: Knee Physiology Step Jumping Exercise Test Methods Task Performance and Analysis Kinetics Human Crossover Design Validation Studies Kinematics Flexion Male Female Linear Regression Descriptive Statistics Knee Abnormalities Musculoskeletal Diseases Diagnosis Athletes Motion Analysis Systems Ground Reaction Force Lower Extremity Exercises Data Analysis Software Adolescence Adult Adolescent: 13-18 years Adult: 19-44 years Male Female ab: Background Although dynamic knee valgus can be visually identified using the 2D frontal plane projection angle (FPPA), the validity of the FPPA in terms of predicting frontal plane knee kinematics has been questioned. The biomechanical utility of the FPPA may lie in its ability to predict frontal plane knee moments. Hypothesis/Purpose The purpose of the current study was to comprehensively evaluate the ability of the FPPA to predict the frontal plane knee kinetics (peak moment, average moment, and moment at peak knee flexion) across a wide range of tasks (stepping, landing, and change of direction). Design Crossover Study Design. Methods Three-dimensional lower-extremity kinetics and 2D video were obtained from 39 healthy athletes (15 males and 24 females) during execution of six tasks (step down, drop jump, lateral shuffle, deceleration, triple hop, side-step-cut). Linear regression analysis was performed to determine if the 2D FPPA at peak knee flexion predicted frontal plane knee moment variables during the deceleration phase of each task (peak moment, average moment, moment at peak knee flexion). Results The FPPA was found to significantly predict the peak frontal plane knee moment for two tasks (deceleration and side-step-cut, R² = 12% to 25%), average frontal plane knee moment for five tasks (drop jump, shuffle, deceleration, triple hop, side-step-cut, R² = 15% to 40%), and frontal plane knee moment at peak knee flexion for five tasks (drop jump, shuffle, deceleration, triple hop, side-step-cut, R² = 16% to 45%). Conclusion An increased FPPA (medial knee collapse) predicted increased knee valgus moments (or decreased knee varus moments) during landing and change of direction tasks (but not stepping). However, the predictive ability of the FPPA was weak to moderate. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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