Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Knee angle"”.
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Quantifying ballet technique through turn kinematics for injury assessment
… technique and prevent injury. Variation in knee angle of a dancer's supporting leg during pirouettes of 1-5 rotations was measured using a goniometer for 12 professional and pre-professional ballet dancers. Plié angle saw no significant difference for different numbers of rotations, but the …
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Variable damping controller for a prosthetic knee during swing extension
… biomechanical studies suggest that the knee utilizes a variable damping control during swing extension. This thesis proposes a biologically inspired variable damping control strategy which can be simplified into a piecewise function with respect to the knee angle. The variable damping …
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The Effect of a Skate Treadmill Training Intervention on Stride Mechanics
… select kinematic measures of the trunk, hip, and knee angles (°). Twenty-three ice hockey players (9.7 ± 0.5 y) completed an A-B-A, within-subject, quasi-experimental training intervention. Twelve treadmill sessions were scheduled over 9 weeks. Block A was defined by sessions 1-6 and 7-12, and …
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Biologically inspired autoadaptive control of a knee prosthesis
This thesis describes the electronic control of a knee prosthesis for amputees. A microprocessor receives data from sensors, processes it and determines the proper level of rotary resistance for the joint. Control is maintained through one of two algorithms -- one for a system with sensors only for …
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The Effect of Different Set-Repetition Protocols on Squat Technique In Resistance Trained Individuals
… repetition was recorded as well as the hip and knee angles at the bottom of each repetition. A three-way (gender x condition x time) analysis of variance with repeated measures (MANOVA) was used to analyze the data. Significance was set at p < 0.05.</p> <p><strong>Results: </strong>Significant …
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Exercise and free radical induced damage to human skeletal muscle
… study investigated the effects of manipulating knee extensor (KE) length during eccentric actions, on indices of muscle damage and knee angle specific force production. This study provided evidence that exercise performed at a long muscle length increased the damage susceptibility of the KE …
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Classification of electroencephalogram (EEG) for lower limb movement of post stroke patients using artificial neural network (ANN)
… by the controller to ensure that the target knee angle is achieved to make the rehabilitation process more effective. As a conclusion, patients can be classified into two classes based on their alpha and beta signals status and these must undergone rehabilitation sessions according to their …
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Development and validation of an objective swine feet and leg conformation procedure using digital imagery
… were used for measurement per sow. A joint angle measuring system was devised to collect angle measurements on the knee, front and rear pastern, hock and rear stance. Joint measurements were analyzed using mixed model methods, including farm, side of measurement and parity as fixed effects …
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The Biomechanics of Sit-to-Stand and Physical Performance in Patellofemoral Osteoarthritis
Osteoarthritis (OA) of the knee is common in Western society. OA of the patellofemoral (PF) compartment of the knee is prevalent in adults greater than 55 years of age. Isolated radiographic PFOA is present in 13.6-24% of females and 11-15.4% of males with knee pain. Biomechanical factors such as …
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Aging, Gait Variability, and Adaptability
… Movement trajectory variability of the dominant knee angle, and vertical and medial-lateral positions of the pelvis were quantified using nonlinear measures (correlation dimension and local dynamic stability). The results showed little association of age and variability measures. Additional …
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The Influence of Heel Height on Sagittal Plane Knee Kinematics during Landing Tasks in Recreationally Active Collegiate Females
… to athletic shoe wear would alter sagittal plane knee kinematics when landing from jumping maneuvers. The hypothesis was that increased heel height would increase knee flexion at initial contact (KAIC), increase the peak knee flexion angle (KAPeak), and slow the rate of knee excursion (RKE). Fifty …
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Understanding risk of injury in novice runners: exploring the link between runner characteristics, biomechanics and injury outcome
… strategies, including a lower foot strike angle (FSA), more flexed knee angle at foot strike and reduced knee range of motion during stance phase to compensate for the lack of cushioning. Whilst most novice runners adopted a rear foot strike pattern throughout the intervention, the RC group …
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The biomechanical and neuromuscular responses to shoe-surface instability
… of frontal ankle motion and maximum sagittal knee angle in stance phase. This is proposed to benefit IM wearers by improving the level of functional joint variability. The second study assessed if the varied instability of IM would be more de-stabilising than an unstable shoe (US) by comparing …
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The biomechanical changes in gait and posture as a result of the total knee arthroplasty
… that 25% of the UK population suffers from knee pain, with 50% of this group being affected by knee osteoarthritis. Of this 50% of the population it has been suggested that 27.4 out of every 1000 knees are deemed suitable for replacement (arthroplasty). This study aimed to investigate the …
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A Biomechanical Analysis of Sprinters vs. Distance Runners at Equal and Maximal Speeds
… trial was collected at 180 Hz, monitoring hip, knee, thigh, and shank positions, as well as stride length, and contact time. <strong>RESULTS:</strong> Significant differences (p < .05) between the sprint and distance groups at maximal speed were found in the following areas: speed, minimum hip …
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Neuromuscular adaptations of joint angle-specific force change after isometric training
… training typically occur at or around the joint angles adopted during the training, but the mechanisms underpinning this have not yet been fully elucidated. This PhD thesis project investigated the mechanisms underpinning joint angle-specific strength changes after isometric training, focussing …
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Modifiable risk factors of hamstring strain injury : assessment, performance and training
… between the two groups for peak and waveform knee and hip kinematics and BFLH EMG measurements. The differences observed in Chapter 5 could be defined as being unfavourable, especially as the differences occur both within the take off and late swing phases, as being defined as areas of …