scholarly journals Agreement Between Visual Assessment and 2-Dimensional Analysis During Jump Landing Among Healthy Female Athletes

2018 ◽  
Vol 53 (4) ◽  
pp. 386-394 ◽  
Author(s):  
Alon Rabin ◽  
Ofira Einstein ◽  
Zvi Kozol
Keyword(s):  
High Speed ◽  
Female Athletes ◽  
Sagittal Plane ◽  
Frontal Plane ◽  
Movement Patterns ◽  
Visual Assessment ◽  
Cross Sectional ◽  
Jump Landing ◽  
Knee Movement ◽  
Healthy Female

Context:  Altered movement patterns, including increased frontal-plane knee movement and decreased sagittal-plane hip and knee movement, have been associated with several knee disorders. Nevertheless, the ability of clinicians to visually detect such altered movement patterns during high-speed athletic tasks is relatively unknown. Objective:  To explore the association between visual assessment and 2-dimensional (2D) analysis of frontal-plane knee movement and sagittal-plane hip and knee movement during a jump-landing task among healthy female athletes. Design:  Cross-sectional study. Setting:  Gymnasiums of participating volleyball teams. Patients or Other Participants:  A total of 39 healthy female volleyball players (age = 21.0 ± 5.2 years, height = 172.0 ± 8.6 cm, mass = 64.2 ± 7.2 kg) from Divisions I and II of the Israeli Volleyball Association. Main Outcome Measure(s):  Frontal-plane knee movement and sagittal-plane hip and knee movement during jump landing were visually rated as good, moderate, or poor based on previously established criteria. Frontal-plane knee excursion and sagittal-plane hip and knee excursions were measured using free motion-analysis software and compared among athletes with different visual ratings of the corresponding movements. Results:  Participants with different visual ratings of frontal-plane knee movement displayed differences in 2D frontal-plane knee excursion (P < .01), whereas participants with different visual ratings of sagittal-plane hip and knee movement displayed differences in 2D sagittal-plane hip and knee excursions (P < .01). Conclusions:  Visual ratings of frontal-plane knee movement and sagittal-plane hip and knee movement were associated with differences in the corresponding 2D hip and knee excursions. Visual rating of these movements may serve as an initial screening tool for detecting altered movement patterns during jump landings.

scholarly journals Validity of a New 3-D Motion Analysis Tool for the Assessment of Knee, Hip and Spine Joint Angles during the Single Leg Squat

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4539
Author(s):  
Igor Tak ◽  
Willem-Paul Wiertz ◽  
Maarten Barendrecht ◽  
Rob Langhout
Keyword(s):  
Sagittal Plane ◽  
Frontal Plane ◽  
Analysis Tool ◽  
Joint Angles ◽  
Cross Sectional ◽  
Physically Active ◽  
Peak Knee ◽  
Passive Tracking ◽  
Single Leg Squat ◽  
University Laboratory

Aim: Study concurrent validity of a new sensor-based 3D motion capture (MoCap) tool to register knee, hip and spine joint angles during the single leg squat. Design: Cross-sectional. Setting: University laboratory. Participants: Forty-four physically active (Tegner ≥ 5) subjects (age 22.8 (±3.3)) Main outcome measures: Sagittal and frontal plane trunk, hip and knee angles at peak knee flexion. The sensor-based system consisted of 4 active (triaxial accelerometric, gyroscopic and geomagnetic) sensors wirelessly connected with an iPad. A conventional passive tracking 3D MoCap (OptiTrack) system served as gold standard. Results: All sagittal plane measurement correlations observed were very strong for the knee and hip (r = 0.929–0.988, p < 0.001). For sagittal plane spine assessment, the correlations were moderate (r = 0.708–0.728, p < 0.001). Frontal plane measurement correlations were moderate in size for the hip (ρ = 0.646–0.818, p < 0.001) and spine (ρ = 0.613–0.827, p < 0.001). Conclusions: The 3-D MoCap tool has good to excellent criterion validity for sagittal and frontal plane angles occurring in the knee, hip and spine during the single leg squat. This allows bringing this type of easily accessible MoCap technology outside laboratory settings.

scholarly journals Serum Total Cholesterol and Triglyceride Status in Female Athletes

2011 ◽  
Vol 5 (2) ◽  
pp. 71-74
Author(s):  
Dilruba Akther ◽  
Ruhul Amin ◽  
US Naima Begum ◽  
Najneen Akhter ◽  
Nasrin Habib ◽  
...  
Keyword(s):  
Total Cholesterol ◽  
Female Athletes ◽  
Serum Triglyceride ◽  
Serum Total Cholesterol ◽  
Test Results ◽  
Cross Sectional ◽  
Medical College ◽  
Cholesterol Levels ◽  
Healthy Female ◽  
Regular Physical Exercise

Background: Exercise plays a role in preventing cardiovascular disease as well as other serious health problems. Objectives: A cross sectional comparative study was performed to observe the changes in serum total cholesterol and triglyceride in apparently healthy female athletes. Methods: This study was carried out in the Department of Physiology of Dhaka Medical College from July 2005 to June 2006. For this, 30 female athletes aged 17 to 38 years (experimental) who were under regular physical exercise training for at least two years and age matched 30 healthy female non athletes (control) for comparison were selected. Fasting serum Triglyceride and total Cholesterol levels of all the subjects were measured. Data were compared between athletes and non athletes and analyzed statistically by unpaired 't' test. Results: Mean±SD cholesterol levels were 141.10 ±14.46 & 165.10±7.03 and Mean±SD Triglyceride levels were 76.10±11.54 & 96.60±17.02 in athletes and non athletes respectively. Serum total cholesterol (p<0.001) and triglycerides (p<0.01) were significantly lower; in athletes compared to those of non athlets. Conclusion: From this study it can be concluded that, serum total cholesterol and triglycerides may be lowered in athletes. Key words: Female athletes; Cholesterol; Triglyceride. DOI: 10.3329/jbsp.v5i2.6780J Bangladesh Soc Physiol. 2010 December; 5(2): 71-74

scholarly journals MOVEMENT PATTERNS DIFFER BETWEEN ATHLETES AFTER SPORT-RELATED CONCUSSION COMPARED TO HEALTHY CONTROLS DURING JUMP LANDING TASK

2021 ◽  
Author(s):  
Bobby Jean Lee ◽  
Damond Blueitt ◽  
Joseph Hannon ◽  
Shiho Goto ◽  
J. Craig Garrison
Keyword(s):  
Lower Extremity ◽  
Sports Medicine ◽  
Sagittal Plane ◽  
Return To Sport ◽  
Knee Extension ◽  
Cross Sectional Study ◽  
Return To Play ◽  
Healthy Controls ◽  
Cross Sectional ◽  
Jump Landing

ABSTRACT Context: A relationship between a positive history of sport-related concussion (SRC) and lower extremity (LE) injury has been well established in the literature. Objective: The purpose of this study was to determine if biomechanical differences exist during a double limb jump landing (DLJ) between athletes who had been released for return to play after SRC and healthy matched controls (Healthy). Design: Cross-Sectional Study Setting: Health system-based Outpatient Sports Medicine Center Participants: 21 participants (16.33±12.7 days out from being released to return to sport after SRC) (age: 15.38±1.77; height: 169.23±8.59; mass: 63.43±7.39) were compared to 21 age, sex, activity-matched healthy controls (age: 15.36±1.73; height: 169.92±11.1; mass: 65.62±12.08). No significant differences existed between groups for descriptive data. Main Outcome Measure(s): Biomechanical performance during DLJ was assessed using Motion Capture System and force plates. The average of five consecutive trials was used to calculate lower extremity joint kinetic and kinematics. Variables of interest included internal knee extension moment, internal varus moment, and total sagittal plane knee displacement for both the dominant and non-dominant limbs. Independent t-tests were performed to examine the differences between SRC and Healthy groups for variables of interest. Results: The SRC group demonstrated greater internal knee extension moments on their dominant (KEDomDiff=–.028±.009; p=.003) and non-dominant (KENonDomDiff=–.018±.007, p=.019) limbs. The SRC group also demonstrated greater internal varus moments on their dominant (VDomDiff=.012±.004, p=.005) and non-dominant (VNonDomDiff=.010±.003, p=.005) limbs. For sagittal plane knee displacement, the SRC group demonstrated less knee flexion displacement on their dominant (DispDomDiff=–12.56±4.67, p=.011) but not their non-dominant limb (DispNonDomDiff=–8.30±4.91, p=.099). Conclusions: Athletes who have been released for return to sport after SRC land in greater knee valgus compared to healthy matched controls.

scholarly journals The shape of disposable diaper affects spontaneous movements of lower limbs in young infants

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hirotaka Gima ◽  
Midori Teshima ◽  
Etsuko Tagami ◽  
Toshihiro Sato ◽  
Hidenobu Ohta
Keyword(s):  
Lower Limb ◽  
Sagittal Plane ◽  
Frontal Plane ◽  
Type A ◽  
Lower Limbs ◽  
Type B ◽  
Limb Movements ◽  
Young Infants ◽  
Knee Movement ◽  
Spontaneous Movements

Abstract This study examined the characteristics of young infants’ lower limb spontaneous movements based on differences in shape of diapers. Twenty-seven healthy infants (103 ± 16.3 days old) were enrolled in this study. We measured the spontaneous movements of their lower limbs in four conditions (Naked, wearing Normal type diapers, wearing Type A diapers, and wearing Type B diapers). The Normal diaper has a wider waist belt than the Type A diaper, and the Type B diaper has a narrower crotch area than the Type A diaper. We observed them in seven indices (the velocity of lower limb movements, the trajectory area of knee movement in the sagittal plane and the frontal plane, the distance between both knees and between side of abdomen and knee, and correlation of velocities between side of abdomen and knee and between left and right ankles). The results showed that the velocity of the lower limb movements in the Naked condition was higher than when wearing Normal diapers. The value for the trajectory area of knee movement in sagittal plane, which reflects the range of lower leg lifting movements and closeness of such movements to the trunk, for the Type B diaper condition was higher than that for the Normal diaper condition. This result indicates that the shape of the diaper affects the spontaneous movements of the lower limbs of young infants.

scholarly journals Validation of a Commercially Available Markerless Motion-Capture System for Trunk and Lower Extremity Kinematics During a Jump-Landing Assessment

2021 ◽  
Vol 56 (2) ◽  
pp. 177-190
Author(s):  
Timothy C. Mauntel ◽  
Kenneth L. Cameron ◽  
Brian Pietrosimone ◽  
Stephen W. Marshall ◽  
Anthony C. Hackney ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Motion Capture ◽  
Joint Angle ◽  
Sagittal Plane ◽  
Frontal Plane ◽  
Lower Extremity Injury ◽  
Joint Angles ◽  
Jump Landing ◽  
Markerless Motion Capture ◽  
Motion Capture Systems

Context Field-based, portable motion-capture systems can be used to help identify individuals at greater risk of lower extremity injury. Microsoft Kinect-based markerless motion-capture systems meet these requirements; however, until recently, these systems were generally not automated, required substantial data postprocessing, and were not commercially available. Objective To validate the kinematic measures of a commercially available markerless motion-capture system. Design Descriptive laboratory study. Setting Laboratory. Patients or Other Participants A total of 20 healthy, physically active university students (10 males, 10 females; age = 20.50 ± 2.78 years, height = 170.36 ± 9.82 cm, mass = 68.38 ± 10.07 kg, body mass index = 23.50 ± 2.40 kg/m2). Intervention(s) Participants completed 5 jump-landing trials. Kinematic data were simultaneously recorded using Kinect-based markerless and stereophotogrammetric motion-capture systems. Main Outcome Measure(s) Sagittal- and frontal-plane trunk, hip-joint, and knee-joint angles were identified at initial ground contact of the jump landing (IC), for the maximum joint angle during the landing phase of the initial landing (MAX), and for the joint-angle displacement from IC to MAX (DSP). Outliers were removed, and data were averaged across trials. We used intraclass correlation coefficients (ICCs [2,1]) to assess intersystem reliability and the paired-samples t test to examine mean differences (α ≤ .05). Results Agreement existed between the systems (ICC range = −1.52 to 0.96; ICC average = 0.58), with 75.00% (n = 24/32) of the measures being validated (P ≤ .05). Agreement was better for sagittal- (ICC average = 0.84) than frontal- (ICC average = 0.35) plane measures. Agreement was best for MAX (ICC average = 0.77) compared with IC (ICC average = 0.56) and DSP (ICC average = 0.41) measures. Pairwise comparisons identified differences for 18.75% (6/32) of the measures. Fewer differences were observed for sagittal- (0.00%; 0/15) than for frontal- (35.29%; 6/17) plane measures. Between-systems differences were equivalent for MAX (18.18%; 2/11), DSP (18.18%; 2/11), and IC (20.00%; 2/10) measures. The markerless system underestimated sagittal-plane measures (86.67%; 13/15) and overestimated frontal-plane measures (76.47%; 13/17). No trends were observed for overestimating or underestimating IC, MAX, or DSP measures. Conclusions Moderate agreement existed between markerless and stereophotogrammetric motion-capture systems. Better agreement existed for larger (eg, sagittal-plane, MAX) than for smaller (eg, frontal-plane, IC) joint angles. The DSP angles had the worst agreement. Markerless motion-capture systems may help clinicians identify individuals at greater risk of lower extremity injury.

scholarly journals Laryngeal High-Speed Videoendoscopy: Sensitivity of Objective Parameters towards Recording Frame Rate

2016 ◽  
Vol 2016 ◽  
pp. 1-19 ◽  
Author(s):  
Anne Schützenberger ◽  
Melda Kunduk ◽  
Michael Döllinger ◽  
Christoph Alexiou ◽  
Denis Dubrovskiy ◽  
...  
Keyword(s):  
Vocal Fold ◽  
High Speed ◽  
Female Subject ◽  
Visual Assessment ◽  
Frame Rate ◽  
Normative Values ◽  
Evidence Based ◽  
Healthy Female ◽  
Parameter Values ◽  
Healthy Female Subject

The current use of laryngeal high-speed videoendoscopy in clinic settings involves subjective visual assessment of vocal fold vibratory characteristics. However, objective quantification of vocal fold vibrations for evidence-based diagnosis and therapy is desired, and objective parameters assessing laryngeal dynamics have therefore been suggested. This study investigated the sensitivity of the objective parameters and their dependence on recording frame rate. A total of 300 endoscopic high-speed videos with recording frame rates between 1000 and 15 000 fps were analyzed for a vocally healthy female subject during sustained phonation. Twenty parameters, representing laryngeal dynamics, were computed. Four different parameter characteristics were found: parameters showing no change with increasing frame rate; parameters changing up to a certain frame rate, but then remaining constant; parameters remaining constant within a particular range of recording frame rates; and parameters changing with nearly every frame rate. The results suggest that (1) parameter values are influenced by recording frame rates and different parameters have varying sensitivities to recording frame rate; (2) normative values should be determined based on recording frame rates; and (3) the typically used recording frame rate of 4000 fps seems to be too low to distinguish accurately certain characteristics of the human phonation process in detail.

Skeletal Manifestations of Heritable Disproportionate Dwarfism in Cats as Determined by Radiography and Magnetic Resonance Imaging

2021 ◽  
Author(s):  
Lisa M. Anderson ◽  
Derek B. Fox ◽  
Kari L. Chesney ◽  
Joan R. Coates ◽  
Bryan T. Torres ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intervertebral Disc ◽  
Sagittal Plane ◽  
Frontal Plane ◽  
Intervertebral Discs ◽  
Resonance Imaging ◽  
Disc Disease ◽  
Joint Orientation ◽  
Cross Sectional

Abstract Objective The aim of this study was to characterize the radiographic alignment of thoracic and pelvic limbs and evaluate for intervertebral disc disease in cats with feline disproportionate dwarfism (FDD). Study Design Observational cross-sectional study. Radiographic joint orientation angles were measured in 10 thoracic and pelvic limbs from 5 FDD cats and compared with those angles measured in 24 thoracic limbs and 100 pelvic limbs from skeletally normal cats. Magnetic resonance imaging of the spine was performed in 2 FDD cats for the evaluation of pathology of the intervertebral discs or vertebrae. Results All limbs from FDD cats possessed deformities. FDD humeri demonstrated procurvatum proximally, and recurvatum distally in the sagittal plane, but showed no difference in the frontal plane. FDD radii possessed excessive recurvatum proximally, and procurvatum distally in the sagittal plane, and varus proximally and valgus distally in the frontal plane. Whereas no torsion was discernible in the humeri, all radii had external torsion. In the frontal plane, FDD femurs exhibited varus both proximally and distally whereas the tibia possessed proximal valgus and distal varus. No torsion in the pelvic limbs was observed. No spinal pathology was detected in the FDD cats included in the original study. Conclusion Feline disproportionate dwarfism results in significant appendicular deformity in all limbs. The incidence of intervertebral disc degeneration in FDD cats is inconclusive.

Repeatability vs complexity: kinematic comparison between a dressage simulator and real horses

2021 ◽  
pp. 1-8
Author(s):  
L. Clark ◽  
E.J. Bradley ◽  
K. Nankervis ◽  
J. Ling
Keyword(s):  
High Speed ◽  
Sagittal Plane ◽  
Spinous Process ◽  
Frontal Plane ◽  
Linear Displacement ◽  
Thoracic Vertebrae ◽  
Video Cameras ◽  
Displacement Vectors ◽  
Stride Duration ◽  
Mean Cycle

Riding simulators are designed to replicate movement of a horse for the purpose of assessment and training of horse riders, but little is known about their similarity in replicating movement of horses. This study tested the validity of a dressage simulator, by measuring cycle/stride duration, range and symmetry of displacement of the simulator and comparing displacement vectors to that of real horses trotting on a treadmill. A reflective marker was placed on the midline of the simulator at the estimated level of the 18th thoracic vertebrae (T18), and over the T18 spinous process of ten horses. The simulator displacement was recorded in trot mode, while the real horses trotted at a comfortable speed on a treadmill. Displacements in three axes of motion were measured using 10 high-speed video cameras sampling at 240 Hz. Correlation tests showed high levels of statistical repeatability and symmetry of the simulator between multiple runs. Mean cycle/stride duration of the simulator was significantly faster than the group of horses by 0.17 s. Significant differences between the simulator and horses were shown in overall displacement in two axes, the simulator displaying 70% greater displacement in the mediolateral axis, 22% greater displacement in the craniocaudal axis, but displaying 12% less movement in the dorsoventral axis, which was not statistically significant. Displacement trajectories showed similarities in the frontal plane, displaying a butterfly-shaped sequence, but clear differences in the sagittal plane, with the horses showing an oval pattern of displacement and the simulator a clear linear displacement. Caution must therefore be taken with assumptions that riders will move in the same way on a simulator as they would on a real horse.

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