Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Anterior cruciate ligament (2)
- Aging (1)
- Athletic injury (1)
- Cocontraction (1)
- Coefficient of Variation (1)
-
- Dynamic contractions (1)
- Ground Reaction Force (1)
- Hip fatigue (1)
- Injury prevention (1)
- Interclass Correlation Coefficient (1)
- Intraclass Correlation Coefficient (1)
- Isometric contractions (1)
- Lower extremity (1)
- Pfps (1)
- Rate of Force Development (1)
- Reproducibility (1)
- Resistance Training (1)
- Sex differences (1)
- Sport Simulated Movement (1)
- Stress (1)
- Time to task failure (1)
Articles 1 - 5 of 5
Full-Text Articles in Medicine and Health Sciences
Reliability Of Surface Electromyography During Maximal Voluntary Isometric Contractions, Jump Landings, And Cutting, Mckenzie Fauth, Erich Petushek, Christina Feldmann, Brittni Hsu, Luke Garceau, Brittney Lutsch, William Ebben
Reliability Of Surface Electromyography During Maximal Voluntary Isometric Contractions, Jump Landings, And Cutting, Mckenzie Fauth, Erich Petushek, Christina Feldmann, Brittni Hsu, Luke Garceau, Brittney Lutsch, William Ebben
Exercise Science Faculty Research and Publications
The reliability of electromyographic (EMG) data has been examined for isometric and slow dynamic tasks, but little is known about the repeatability of this data for ballistic movements. The purpose of this study was to examine the within-session, trial-to-trial reliability of a variety of quadriceps and hamstrings muscles during isometric and ballistic activities. Data were analyzed by way of intraclass correlation coefficients (ICC), intersubject coefficients of variation (CVinter), and intrasubject coefficients of variation (CVintra). Twenty-four subjects performed 3 repetitions each of 2 randomly ordered test exercises, including landing from a depth jump (J) and cutting after …
Effects Of Isolated Hip Abductor Fatigue On Frontal Plane Knee Mechanics, Christopher Geiser, Kristian M. O'Connor, Jennifer E. Earl
Effects Of Isolated Hip Abductor Fatigue On Frontal Plane Knee Mechanics, Christopher Geiser, Kristian M. O'Connor, Jennifer E. Earl
Exercise Science Faculty Research and Publications
Purpose: Anterior cruciate ligament injuries and patellofemoral pain syndrome are both common and significant injuries to the knee that have been associated with hip weakness. Prospective studies have linked the risk of experiencing either injury to alterations in the frontal plane knee angle and moment during activity. These components of knee mechanics are theorized to be affected by hip abductor weakness. The purpose of this study was to identify the effects of isolated hip abductor fatigue-induced weakness on lower extremity kinematics and kinetics in recreationally active women.
Gender-Based Analysis Of Hamstring And Quadriceps Muscle Activation During Jump Landings And Cutting, William Ebben, Mckenzie Fauth, Erich Petushek, Luke Garceau, Brittni Hsu, Brittney Lutsch, Christina Feldmann
Gender-Based Analysis Of Hamstring And Quadriceps Muscle Activation During Jump Landings And Cutting, William Ebben, Mckenzie Fauth, Erich Petushek, Luke Garceau, Brittni Hsu, Brittney Lutsch, Christina Feldmann
Exercise Science Faculty Research and Publications
This study evaluated gender differences in the magnitude and timing of hamstring and quadriceps activation during activities that are believed to cause anterior cruciate ligament (ACL) injuries. Twelve men (age = 21.0 ± 1.2 years; body mass = 81.61 ± 13.3 kg; and jump height = 57.61 ± 10.15 cm) and 12 women (age = 19.91 ± 0.9 years; body mass = 64.36 ± 6.14 kg; and jump height = 43.28 ± 7.5) performed 3 repetitions each of the drop jump (jump) normalized to the subject's vertical jump height, and a sprint and cut at a 45-degree angle (cut). Electromyography …
Response To Task-Specific Sex Differences In Muscle Fatigue: Is There A Common Underlying Cause?, Sandra K. Hunter
Response To Task-Specific Sex Differences In Muscle Fatigue: Is There A Common Underlying Cause?, Sandra K. Hunter
Exercise Science Faculty Research and Publications
No abstract provided.
Kinetic Analysis Of Lower Body Resistance Training Exercises, Mckenzie L. Fauth, Luke Garceau, Brittney Lutsch, Aaron Gray, Chris Szalkowski, Brad Wurm, William Ebben
Kinetic Analysis Of Lower Body Resistance Training Exercises, Mckenzie L. Fauth, Luke Garceau, Brittney Lutsch, Aaron Gray, Chris Szalkowski, Brad Wurm, William Ebben
Exercise Science Faculty Research and Publications
This study evaluated and compared the peak vertical ground reaction force (GRF) and rate of force development (RFD) for the eccentric and concentric phases of 4 lower body resistance training exercises, including the back squat, deadlift, step-up, and forward lunge. Sixteen women performed 2 repetitions of each of the 4 exercises at a 6 repetition maximum load. Kinetic data were acquired using a force platform. A repeated measures ANOVA was used to evaluate the differences in GRF between the exercises. Results revealed significant main effects for GRF both the eccentric (p ≤ 0.001) and concentric (p ≤ 0.001) …