Browsing Physiotherapy Faculty Research, Publications and Presentations by Submit Date

Now showing items 21-31 of 31

  • Effect of a high intensity quadriceps fatigue protocol on knee joint mechanics and muscle activation during gait in young adults. 

    Murdock, Gillian Hatfield, and Cheryl L. Hubley-Kozey. "Effect of a high intensity quadriceps fatigue protocol on knee joint mechanics and muscle activation during gait in young adults." European journal of applied physiology 112.2 (2012): 439-449. doi:10.1007/s00421-011-1990-4 © 2012 SpingerLink
    The purpose of this study was to determine the effect of impaired quadriceps function on knee joint biomechanics and neuromuscular function during gait. Surface electromyograms, three-dimensional motion and ground reaction ...

  • Obesity is associated with higher absolute tibiofemoral contact and muscle forces during gait with and without knee osteoarthritis 

    Published version: Harding, Graeme T., et al. "Obesity is associated with higher absolute tibiofemoral contact and muscle forces during gait with and without knee osteoarthritis." Clinical Biomechanics 31 (2016): 79-86. doi:10.1016/j.clinbiomech.2015.09.017
    Background Obesity is an important risk factor for knee osteoarthritis initiation and progression. However, it is unclear how obesity may directly affect the mechanical loading environment of the knee joint, initiating ...

  • Obesity is associated with prolonged activity of the quadriceps and gastrocnemii during gait 

    Published version: Amiri, P., et al. "Obesity is associated with prolonged activity of the quadriceps and gastrocnemii during gait." Journal of Electromyography and Kinesiology 25.6 (2015): 951-958. doi:10.1016/j.jelekin.2015.10.007
    Purpose: To examine the effect of obesity and its potential interaction with knee OA presence on the electromyography patterns of the major knee joint periarticular muscles during walking. Scope: One hundred and eighteen ...

  • Asymptomatic and symptomatic individuals with the same radiographic evidence of knee osteoarthritis walk with different knee moments and muscle activity 

    Published version: Astephen Wilson, Janie L., William D. Stanish, and Cheryl L. Hubley‐Kozey. "Asymptomatic and symptomatic individuals with the same radiographic evidence of knee osteoarthritis walk with different knee moments and muscle activity." Journal of Orthopaedic Research (2016). doi:10.1002/jor.23465
    There is an established discordance between the structural joint damage and clinical symptoms of knee osteoarthritis; however, there has been little investigation into the differences in joint level biomechanics and muscle ...

  • Differences in Abdominal Muscle Activation Patterns of Younger and Older Adults Performing an Asymmetric Leg-Loading Task 

    Published version: Hubley-Kozey, Cheryl L., et al. "Differences in abdominal muscle activation patterns of younger and older adults performing an asymmetric leg-loading task." PM&R 1.11 (2009): 1004-1013. doi:10.1016/j.pmrj.2009.09.018
    Objectives: To determine whether differences exist between younger (20-50 years) and older adults ( 65 years) in abdominal muscle amplitudes, temporal patterns, and threedimensional (3D) pelvic motion, while performing ...

  • Electromyographic assessment of trunk muscle activation amplitudes during a simulated lifting task using pattern recognition techniques 

    Published version: Butler, Heather L., Cheryl L. Hubley-Kozey, and John W. Kozey. "Electromyographic assessment of trunk muscle activation amplitudes during a simulated lifting task using pattern recognition techniques." Journal of Electromyography and Kinesiology 19.6 (2009): e505-e512. doi:10.1016/j.jelekin.2008.09.010
    This study sought to determine the patterns of neuromuscular response from 24-trunk muscle sites during a symmetrical lift and replace task. Surface electromyograms (EMG) and kinematic variables were recorded from 29 healthy ...

  • Activation amplitude patterns do not change for back muscles but are altered for abdominal muscles between dominant and non-dominant hands during one-handed lifts 

    Published version: : Butler, Heather L., Cheryl L. Hubley-Kozey, and John W. Kozey. "Activation amplitude patterns do not change for back muscles but are altered for abdominal muscles between dominant and non-dominant hands during one-handed lifts." European journal of applied physiology 106.1 (2009): 95-104. doi:10.1007/s00421-009-0994-9
    It is assumed when lifting with the dominant hand that the relationship between contralateral and ipsilateral trunk muscle responses are similar to when lifting with the non-dominant hand. The purpose of this study was to ...

  • The interpretation of abdominal wall muscle recruitment strategies change when the electrocardiogram (ECG) is removed from the electromyogram (EMG) 

    Published version: Butler, Heather L., et al. "The interpretation of abdominal wall muscle recruitment strategies change when the electrocardiogram (ECG) is removed from the electromyogram (EMG)." Journal of Electromyography and Kinesiology 19.2 (2009): e102-e113. doi:10.1016/j.jelekin.2007.10.004
    The purpose of this study was to determine the effect of the ECG artifact on low-level trunk muscle activation amplitudes and assess the effectiveness of two methods used to remove the ECG. Simulations were performed and ...

  • Characterisation of trunk muscle activation amplitude patterns during a simulated checkstand operation with continuously changing flexor and lateral moment demands 

    Published version: Butler, Heather L., Cheryl L. Hubley-Kozey, and John W. Kozey. "Characterisation of trunk muscle activation amplitude patterns during a simulated checkstand operation with continuously changing flexor and lateral moment demands." Ergonomics 53.5 (2010): 685-695. doi:10.1080/00140131003671991.
    While the typical physical exposure to modern-day workers has changed from heavy to low level repetitive demands, there is limited research that examines light occupations. This study examined trunk muscle recruitment ...

  • Temporal coactivation of abdominal muscles during dynamic stability exercises 

    Published version: Hubley-Kozey, Cheryl L., Gillian L. Hatfield, and Krista Clarke Davidson. "Temporal coactivation of abdominal muscles during dynamic stability exercises." The Journal of Strength & Conditioning Research 24.5 (2010): 1246-1255. doi:10.1519/JSC.0b013e3181ce24c7
    The purpose of this study was to determine abdominal muscle temporal responses to a leg-loading exercise protocol and if differences exist between those able and unable to minimize lumbar-pelvic motion during this protocol. ...

  • The Effect of Total Knee Arthroplasty on Knee Joint Kinematics and Kinetics During Gait 

    Published version: Hatfield, Gillian L., et al. "The effect of total knee arthroplasty on knee joint kinematics and kinetics during gait." The Journal of arthroplasty 26.2 (2011): 309-318. doi:10.1016/j.arth.2010.03.021
    This study determined how total knee arthroplasty (TKA) altered knee motion and loading during gait. Three-dimensional kinematic and kinetic gait patterns of 42 patients with severe knee osteoarthritis were collected 1 ...