Open Access. Powered by Scholars. Published by Universities.®
Biomedical Engineering and Bioengineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Biomedical Engineering and Bioengineering
Elbow And Shoulder Joint Torques Are Correlated With Body Mass Index But Not Game Pitch Count In Youth Baseball Pitchers, Jim Douglas Darke, Eshan M. Dandekar, Arnel Aguinaldo, Scott Hazelwood, Stephen M. Klisch
Elbow And Shoulder Joint Torques Are Correlated With Body Mass Index But Not Game Pitch Count In Youth Baseball Pitchers, Jim Douglas Darke, Eshan M. Dandekar, Arnel Aguinaldo, Scott Hazelwood, Stephen M. Klisch
Biomedical Engineering
The number of ulnar collateral ligament (UCL) reconstructive (i.e. “Tommy John”) surgeries performed on youth baseball pitchers have more than doubled since 2000 [1]. Routinely pitching while fatigued is considered a leading factor associated with UCL injuries; adolescent pitchers who had elbow or shoulder surgery were 36 times more likely to have routinely pitched with arm fatigue [1]. MLB/USA Baseball Pitch Smart guidelines limit 9-10 yr. old pitchers to a maximum 75 pitches per game, a figure based on long-term studies related to injury prevention [2]. Several studies have shown that pitching kinematics (e.g. elbow flexion/extension and pronation/supination, scapulothoracic internal-external …
Knee Biomechanics During Cycling Are Similar For Normal Weight And Obese Subjects, Juan D. Gutierrez-Franco, Jordan Skaro, Scott Hazelwood, Stephen M. Klisch
Knee Biomechanics During Cycling Are Similar For Normal Weight And Obese Subjects, Juan D. Gutierrez-Franco, Jordan Skaro, Scott Hazelwood, Stephen M. Klisch
Biomedical Engineering
Osteoarthritis (OA) is a degenerative disease of cartilage and bone tissue, and is linked to more than 70% of total hip and knee replacements [1]. In 1994 the direct and indirect costs of OA in the United States were $155 billion [2] and in 2006 OA resulted in approximately $10.5 billion in hospital charges [3]. Obesity is a risk factor for OA [1, 3, 4], likely due to increased knee loading [5, 6] and varus malalignment [7] in gait. Seated cycling has been recommended as a weight-loss exercise with lower knee loads than walking or jogging [8]. However, lack of …
Principal Component Analysis Of Gait And Cycling Experiments: Crosstalk Error Reduction And Corrected Knee Axes, Jordan Skaro, Harsh Goel, Scott Hazelwood, Stephen M. Klisch
Principal Component Analysis Of Gait And Cycling Experiments: Crosstalk Error Reduction And Corrected Knee Axes, Jordan Skaro, Harsh Goel, Scott Hazelwood, Stephen M. Klisch
Biomedical Engineering
Crosstalk is a leading source of error in motion analysis [1-2]. Due to incorrect flexion axis direction that develops from marker placement error, crosstalk results in a strong, anatomically incorrect correlation between flexion-extension (FE) and adduction-abduction (AA) motions [1-2]. Thus, crosstalk limits the ability of biomechanical models to reflect the “true” motion of the knee. Principal Component Analysis (PCA) has been proposed as a post-hoc correction for crosstalk in prior gait studies [1-2]; however, previous studies have not proposed a method to determine PCA corrected knee axes. Further, it is not clear how PCA should be implemented in motion analysis …
Emg-Driven Inverse Dynamic Analysis Of Knee Contact Forces During Gait And Cycling Using Opensim, Megan V. Pottinger, Katherine Mavrommati, Scott Hazelwood, Stephen M. Klisch
Emg-Driven Inverse Dynamic Analysis Of Knee Contact Forces During Gait And Cycling Using Opensim, Megan V. Pottinger, Katherine Mavrommati, Scott Hazelwood, Stephen M. Klisch
Biomedical Engineering
Joint contact forces determine the loading experienced by cartilage tissue and, thus, may be used to predict risk of cartilage tissue damage and osteoarthritis (OA). Participating in low impact and/or non-weight bearing activities such as cycling may help reduce knee OA risk by limiting forces exerted during exercise [1]. Cycling is a common recommendation for rehabilitative or fitness sustainment exercise for select patients [1]. Although knee joint contact forces have been directly measured in gait and cycling using instrumented knee implants [2,3] and calculated in gait using EMG-driven analysis [4]; they have not been calculated in cycling using EMG-driven analysis. …