Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Biomechanics (3)
- Continuous analysis (1)
- Exercise (1)
- Football (1)
- Ground-reaction forces (1)
-
- Isometric midthigh pull (1)
- Kicking cues (1)
- Moderate-to-vigorous physical activity (1)
- Movement pattern (1)
- Multiple sclerosis (1)
- Musculoskeletal modeling (1)
- Optical coherence tomography (1)
- Principal-component analysis (1)
- Resistance training (1)
- Retinal nerve fiber layer (1)
- Total macular volume (1)
Articles 1 - 4 of 4
Full-Text Articles in Medicine and Health Sciences
Moderate-To-Vigorous Physical Activity Is Related With Retinal Neuronal And Axonal Integrity In Persons With Multiple Sclerosis, Jeongwoon Kim, Rachel E. Bollaert, Jonathan Cerna, Brynn C. Adamson, Connor M. Robbs, Naiman A. Khan, Robert W. Motl
Moderate-To-Vigorous Physical Activity Is Related With Retinal Neuronal And Axonal Integrity In Persons With Multiple Sclerosis, Jeongwoon Kim, Rachel E. Bollaert, Jonathan Cerna, Brynn C. Adamson, Connor M. Robbs, Naiman A. Khan, Robert W. Motl
Exercise Science Faculty Research and Publications
Background
Moderate-to-vigorous physical activity (MVPA) may confer benefits for axonal and/or neuronal integrity in adults with multiple sclerosis (MS).
Purpose
Examine the association between device-measured MVPA with optical coherence tomography (OCT) metrics of retinal nerve fiber layer (RNFL) thickness and total macular volume (TMV) in persons with and without MS.
Methods
Adults with MS (N = 41), along with sex-matched healthy control (HC) participants (N = 79), underwent measurements of retinal morphology via OCT and wore an accelerometer for a period of 7 days as a measure of MVPA.
Results
Persons with MS had significantly lower MVPA, RNFL thickness, and …
Muscle-Specific Contributions To Lower Extremity Net Joint Moments While Squatting With Different External Loads, Kristof Kipp, Hoon Kim, William I. Wolf
Muscle-Specific Contributions To Lower Extremity Net Joint Moments While Squatting With Different External Loads, Kristof Kipp, Hoon Kim, William I. Wolf
Exercise Science Faculty Research and Publications
The purpose of this study was to determine muscle-specific contributions to lower extremity net joint moments (NJMs) during squats with different external loads. Nine healthy subjects performed sets of the back squat exercise with 0, 25, 50, and 75% of body mass as an added external load. Motion capture and force plate data were used to calculate NJMs and to estimate individual muscle forces via static optimization. Individual muscle forces were multiplied by their respective moment arms to calculate the resulting muscle-specific joint moment. Statistical parametric mapping (α = 0.05) was used to determine load-dependent changes in the time series …
Maximal Strength In Relation To Force And Velocity Patterns During Countermovement Jumps, Michael H. Haischer, John Krzyszkowski, Stuart Roche, Kristof Kipp
Maximal Strength In Relation To Force And Velocity Patterns During Countermovement Jumps, Michael H. Haischer, John Krzyszkowski, Stuart Roche, Kristof Kipp
Exercise Science Faculty Research and Publications
Maximal strength is important for the performance of dynamic athletic activities, such as countermovement jumps (CMJ). Although measures of maximal strength appear related to discrete CMJ variables, such as peak ground reaction forces (GRF) and center-of-mass (COM) velocity, knowledge about the association between strength and the time series patterns during CMJ will help characterize changes that can be expected in dynamic movement with changes in maximal strength. Purpose: To investigate the associations between maximal strength and GRF and COM velocity patterns during CMJ. Methods: Nineteen female college lacrosse players performed 3 maximal-effort CMJs and isometric midthigh pull. GRF …
Hip And Knee Joint Angle Patterns And Kicking Velocity In Female And Male Professional Soccer Players: A Principal Component Analysis Of Waveforms Approach, Archit Navandar, Kristof Kipp, Enrique Navarro
Hip And Knee Joint Angle Patterns And Kicking Velocity In Female And Male Professional Soccer Players: A Principal Component Analysis Of Waveforms Approach, Archit Navandar, Kristof Kipp, Enrique Navarro
Exercise Science Faculty Research and Publications
This study used principal component analysis (PCA) of waveforms to extract movement patterns from hip and knee angle time-series data; and determined if the extracted movement patterns were predictors of ball velocity during a soccer kick. Twenty-three female and nineteen male professional soccer players performed maximal effort instep kicks while motion capture and post-impact ball velocities data were recorded. Three-dimensional hip and knee joint angle time-series data were calculated from the beginning of the kicking leg’s backswing phase until the end of the follow-through phase and entered into separate PCAs for females and males. Three principal components (PC) (i.e., movement …