Test-retest reliability and minimum detectable change for various frontal plane projection angles during dynamic tasks

Werner, David; Stasi, Stephanie Di; Lewis, Cara L.; Barrios, Joaquin Alberto

doi:10.1016/j.ptsp.2019.09.011

Cited by 20 publications

(11 citation statements)

References 31 publications

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“…After the examination, the operator replayed the movie and stopped the video when the patient's squat reached the deepest point; then, the operator took out a frame from the movie. On this frame, the knee medial/lateral deviation was defined by digital goniometer [37,38], which measures the two-dimensional position of knee, called the frontal plane projection angle [39]. This procedure only measures the momentary condition of the knee.…”

Section: Discussionmentioning

confidence: 99%

Kinect Azure–Based Accurate Measurement of Dynamic Valgus Position of the Knee—A Corrigible Predisposing Factor of Osteoarthritis

et al. 2021

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(1) Dynamic knee valgus is a predisposing factor for anterior cruciate ligament rupture and osteoarthritis. The single-leg squat (SLS) test is a widely used movement pattern test in clinical practice that helps to assess the risk of lower-limb injury. We aimed to quantify the SLS test using a marker-less optical system. (2) Kinect validity and accuracy during SLS were established by marker-based OptiTrack and MVN Xsens motion capture systems. Then, 22 individuals with moderate knee symptoms during sports activities (Tegner > 4, Lysholm > 60) performed SLS, and this was recorded and analyzed with a Kinect Azure camera and the Dynaknee software. (3) An optical sensor coupled to an artificial-intelligence-based joint recognition algorithm gave a comparable result to traditional marker-based motion capture devices. The dynamic valgus sign quantified by the Q-angle at the lowest point of the squat is highly dependent on squat depth, which severely limits its comparability among subjects. In contrast, the medio-lateral shift of the knee midpoint at a fixed squat depth, expressed in the percentage of lower limb length, is more suitable to quantify dynamic valgus and compare values among individual patients. (4) The current study identified a new and reliable way of evaluating dynamic valgus of the knee joint by measuring the medial shift of the knee-over-foot at a standardized squat depth. Using a marker-less optical system widens the possibilities of evaluating lower limb functional instabilities for medical professionals.

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Section: Discussionmentioning

confidence: 99%

Kinect Azure–Based Accurate Measurement of Dynamic Valgus Position of the Knee—A Corrigible Predisposing Factor of Osteoarthritis

et al. 2021

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“…However, one of the most popular and commonly used, low-cost, and simple evaluation methods is 2D analysis. Research showed high reliability and good agreement in terms of the mean difference between 2D and 3D analysis of the FPPA [ 16 , 17 , 18 , 19 ]. The FPPA of the knee is obtained via an angular measurement of the thigh and lower leg in the frontal plane in video analysis [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Research showed high reliability and good agreement in terms of the mean difference between 2D and 3D analysis of the FPPA [ 16 , 17 , 18 , 19 ]. The FPPA of the knee is obtained via an angular measurement of the thigh and lower leg in the frontal plane in video analysis [ 19 ]. Therefore, in the current study, knee valgus evaluation was performed using the FPPA method.…”

Section: Introductionmentioning

confidence: 99%

Association between Selected Screening Tests and Knee Alignment in Single-Leg Tasks among Young Football Players

Wilczyński

Radzimiński

Sobierajska-Rek

et al. 2022

IJERPH

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This study aimed to examine the relationship between knee valgus in the frontal plane projection angle (FPPA) during single-leg squat (SLS), single-leg landing (SLL), and other selected clinical tests in young athletes. Forty-three young healthy elite football players (age: 13.2 (1.7) years) that were regularly training in a local sports club participated in the study. The FPPA was assessed using 2D video analysis. The screening tests included the passive single-leg raise (PSLR), hip external and internal rotation (hip ER and IR), sit and reach test, weight-bearing lunge test (WBLT), modified star excursion balance test (mSEBT), countermovement jump (CMJ), single-leg hop for distance (SLHD), and age peak height velocity (APHV). There was a significant positive relationship between the knee valgus angles in the SLS test and the sit and reach test (r = 0.34) and a negative relationship with the hip ER ROM (r = −0.34) (p < 0.05). The knee valgus angles in the SLL were negatively associated with the hip IR (r = −0.32) and ER ROM (r = −0.34) and positive associated with the WBLT (r = 0.35) and sit and reach test (r = 0.33) (p < 0.05). Linear regression analysis showed that the results of the hip ER ROM and sit and reach tests were independent predictors of the FPPA in the SLS test (r2 = 0.11, p = 0.03 and r2 = 0.12, p = 0.02, respectively). The conducted study showed that individuals with more hip range of motion, more spine flexion extensibility, and less ankle dorsiflexion ROM may be more likely to experience high degrees of knee valgus in FPPA.

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“…A 3D analysis is a gold standard for the kinematic evaluation of DKV. However, an acceptable, cheaper, and easier to use method is a 2D analysis focusing on the assessment of the FPPA of the knee [ 22 , 23 ]. Moreover, researchers reported reliability, reproducibility, and good agreement in an average mean difference in FPPA between 2D and 3D analysis.…”

Section: Introductionmentioning

confidence: 99%

Impact of Three Strengthening Exercises on Dynamic Knee Valgus and Balance with Poor Knee Control among Young Football Players: A Randomized Controlled Trial

2021

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The observed dynamic knee valgus and the limited dynamic balance described in the literature are modifiable risk factors for injuries in athletes. Therefore, identification and appropriate prevention are crucial in managing the development of young athletes. The aim of the study was to assess the effectiveness of three exercises strengthening the muscles: gluteal medius, popliteal and tibialis posterior to reduce dynamic knee valgus and improve the dynamic balance of the lower limbs in young football players with poor knee control. A total of 134 footballers were assessed for eligibility, and finally 45 participants (age 12–15) met the inclusion criteria. Participants were assessed with 2D video kinematic analysis during single-leg squats to assess the knee valgus angles and the dynamic balance (Y-Balance Test). No significant interactions between groups (Control and Exercise) and time (baseline and after 6 week) were noted for dynamic valgus for the left and right knee (p > 0.05). For the dynamic balance, there were statistically significant results, but not clinically relevant for anterior, posteromedial, and composite direction for the right lower limbs and for the anterior direction for left lower limbs in the exercise group. However, there were no significant differences (p > 0.05) in all of the YBT scores for both lower limbs between groups. This study demonstrated that there were no statistically significant differences in dynamic knee valgus angles and dynamic balance values after 6 weeks of exercise program in young footballers with poor knee control. Future randomized trials should focus on more comprehensive exercises, where possible using biofeedback methods to improve knee kinematics.

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Test-retest reliability and minimum detectable change for various frontal plane projection angles during dynamic tasks

Cited by 20 publications

References 31 publications

Kinect Azure–Based Accurate Measurement of Dynamic Valgus Position of the Knee—A Corrigible Predisposing Factor of Osteoarthritis

Kinect Azure–Based Accurate Measurement of Dynamic Valgus Position of the Knee—A Corrigible Predisposing Factor of Osteoarthritis

Association between Selected Screening Tests and Knee Alignment in Single-Leg Tasks among Young Football Players

Impact of Three Strengthening Exercises on Dynamic Knee Valgus and Balance with Poor Knee Control among Young Football Players: A Randomized Controlled Trial

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