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 20 of 107 for “"knee flexion"”.
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Anterior Cruciate Ligament Elasticity and Force for Knee Flexion during the Menstrual Cycle in Women
… studies have been conducted on changes of knee ligament laxity during the menstrual cycle (MC) since there are more injuries in certain phases. Some researchers believe that since estrogen receptor β exists in ligaments and tendons in the knee, estrogen may modulate towards a state of …
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Validation of an Inertial-Measurement-Unit System for Calculating Hip and Knee Flexion Angles During Gait
… system (IMU<sub>sys</sub>) to measure hip and knee flexion angles. PURPOSE: To validate the use of a five-sensor IMU<sub>sys</sub> for the measurement of knee and hip flexion angles during gait in adults and pediatrics at two different time points. METHODS: Bilateral hip and knee flexion …
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Kinematic Analysis of Gait and Deep Knee Flexion for Pre- and Post-Operative Total Knee Arthroplasty
… causing pain, discomfort, and disability. Total Knee Arthroplasty (TKA) is a surgical procedure performed when OA symptoms are severe with an estimated 600,000 patients in the United States currently receiving TKA. Studies have reported dissatisfaction of the knee for 14-39% of patients. This …
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Using a Single inertial measurement unit to measure the knee flexion angle at touchdown in side cutting movements
… single IMU sensor to monitor the behavior of the knee joint angle for specific rehabilitation exercises, but not for more complex sports-related movements like side cutting. Hence, this study focused on validating a single IMU sensor and identifying the best placement to position it between the …
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Impact of Sex and Stretch-Shortening Cycle Induced-Fatigue on Limb Stiffness and Limb Stiffness Asymmetry During the Stop-Jump
… the onset of fatigue. Asymmetry values for peak knee flexion angle, absolute value of knee flexion angle at initial contact (IC), and loading rate were also assessed before and after fatigue. Significant interactions for asymmetry values of peak knee flexion angle and absolute value of knee …
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Translation der Menisken und Femurkondylen relativ zur Tibia bei Patienten mit vorderer Kreuzbandruptur - Analyse mit der offenen Magnetresonanztomographie
… patterns in healthy and ACL-deficient knees in different knee flexion angles under muscle activity. Methods: The ACL-deficient and contralateral healthy knees of 10 patients were examined with an open MR system at 30° and 90° of knee flexion, under both flexing and extending, isometric …
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Integrated Prosthetic Leg Design Frameworks for People with an Above-Knee Amputation
… low-cost, high biomechanical performance above-knee prosthetic leg components (prosthetic foot and knee) that will result in a walking motion likely to be perceived as able-bodied after minimal acclimation time. Above-knee amputees have two common gait deviations from able-bodied and below-knee …
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Bodyweight Squat Movement Changes after a High-Intensity Short-Rest Workout
… total displacement and rate were assessed for knee flexion, trunk flexion, hip flexion, hip rotation and hip adduction. Subjects were split in to two groups: high lactate (n=7) and low lactate (n=7). Separate 2x2 mixed model ANOVAs were used to assess differences between time points (pre-test, …
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The effects of a 12 week aerobic bench stepping conditioning program on cardiorespiratory fitness and muscular leg strength in college women
… treadmill and muscular leg strength, measured by knee flexion and extension strength, on college women ranging in age from 18 to 25 years. Prior to a twelve week conditioning period subjects were assessed for maximum oxygen uptake (VO{dollar}\sb2{dollar} max) and time on treadmill (TOT) using a …
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The second skin approach : skin strain field analysis and mechanical counter pressure prototyping for advanced spacesuit design
… of the surface area and volume of the thigh, knee, calf, and entire leg during knee flexion. The second experiment is an analysis of the full-field strain on the skin surface of the leg during knee flexion. A repeatable and quantitative technique for mapping the leg skin strain field is …
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Effects of prophylactic lace-up ankle braces on kinetics and kinematics of the lower extremity during a state of fatigue.
… range of motion has the potential to alter knee kinematics and is linked to chronic knee pathologies. Thirteen college-aged (6 males) and (7 females) experienced in landing/cutting sports completed a random crossover design study consisting of a 90° cutting task and a 15m beep test fatigue …
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A systematic review: The effect of prophylactic braces on reducing risk factors related to ACL injury in athletes
… study sought to review research on prophylactic knee bracing (PKB) for the reduction of the risk factors related to injury of the ACL.</p> <p><strong>Methods: </strong>An extensive search of articles from 1990-2021 was performed with inclusion criteria of no previous ACL injury, no knee injury or …
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Factors associated with stiff knee gait in cerebral palsy
Stiff knee gait (SKG) is one of a few classified walking patterns which people with cerebral palsy (pwCP) can present with. The characteristic for SKG is delayed and/or reduced peak knee flexion during swing phase, which can reduce walking ability and result in functional restrictions. Through the …
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Development and evaluation of biarticular transtibial prostheses for level-ground amputee walking
… calf muscle spans both the ankle and knee joint, and thus provides biarticular function. Therefore, it may be prudent for transtibial prostheses to include actuation at both the ankle and knee joints of an affected limb. This thesis presents the development of two such biarticular …
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Hip and Knee Biomechanics for Transtibial Amputees in Gait, Cycling, and Elliptical Training
… are at increased risk of contralateral hip and knee joint osteoarthritis, likely due to abnormal biomechanics. Biomechanical challenges exist for transtibial amputees in gait and cycling; particularly, asymmetry in ground/pedal reaction forces and joint kinetics is well documented and …
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Design and in vivo verification of a stress radiography device towards it's suitability for multi-ligament laxity measurements
The human knee is a hinge joint, primarily facilitating locomotion. Knee joint instability, due to ligament injuries, is a result of direct or indirect trauma, non-anatomical stresses during pivoting movements about the knee, imbalanced landing during jumping and rapid deceleration during high …
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Relationships between throwing velocity and selected kinematics in youth baseball players
… available Dartfish software. Trunk side bend and knee flexion angle at foot contact, and trunk flexion, knee flexion, and knee extension velocity at ball release were calculated. Intra-rater reliability of ten re-digitized trials using Pearson’s inter-item correlation was very high (r = 0.99, p < …
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Assessing Symmetry in Landing Mechanics During Single-Leg and Bilateral Tasks in Healthy Recreational Athletes
… ACL-R subjects displayed greater asymmetry in knee flexion variables, peak forces, and peak knee extension moments during the bilateral landing (p<0.001) and in hop distance (p<0.001). Control subjects showed greater asymmetry in knee flexion variables during the single-leg hop (p<0.001). Males …
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The Relationship Between Integrated Electromyography and Torque at Varying Joint Angles and Intensities of The Static Contraction of the Rectus Femoris Muscle in Normal Female Subjects
… required to perform a maximal static exercise of knee extension for 10 seconds at 90 degrees, 60 degrees, 30 degrees, and 10 degrees of knee flexion. Simultaneous readings of torque and IEMG were recorded for each contraction. There was no linear relationshipo between torque and IEMG at varying …
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