Open Access. Powered by Scholars. Published by Universities.®
- Publication
- Publication Type
Articles 1 - 5 of 5
Full-Text Articles in Kinesiology
Lower Extremity Neuromechanics During A Forward-Side Jump Following Functional Fatigue In Patients With Ankle Instability, Hyun Kim
Theses and Dissertations
Ankle instability (AI) and fatigue impair neuromuscular control as well as dynamic joint stability of the lower extremity. No one has comprehensively examined the effects of AI and fatigue on neuromechanics of the lower extremity during a functional activity. Deficits associated with AI and fatigue could be additive in increasing the risk for injury in patients with AI. PURPOSE: To examine the interaction of AI and fatigue on lower extremity muscle activity, kinematic, and kinetic patterns during a forward-side jump. METHODS: 25 AI (23.3 ± 1.9 yrs, 176.5 ± 10.5 cm, 70.9 ± 11.4 kg), and 25 matched control subjects …
Instrumented Figure Skating Blade For Measuring On-Ice Skating Forces, S A. Acuña, D M. Smith, J M. Robinson, J C. Hawks, P Starbuck, D L. King, Sarah T. Ridge, Steven Knight Charles
Instrumented Figure Skating Blade For Measuring On-Ice Skating Forces, S A. Acuña, D M. Smith, J M. Robinson, J C. Hawks, P Starbuck, D L. King, Sarah T. Ridge, Steven Knight Charles
Faculty Publications
Competitive figure skaters experience substantial, repeated impact loading during jumps and landings. Although these loads, which are thought to be as high as six times body weight, can lead to overuse injuries, it is not currently possible to measure these forces on-ice. Consequently, efforts to improve safety for skaters are significantly limited. Here we present the development of an instrumented figure skating blade for measuring forces on-ice. The measurement system consists of strain gauges attached to the blade, Wheatstone bridge circuit boards, and a data acquisition device. The system is capable of measuring forces in the vertical and horizontal directions …
Analysis Of A Kinetic Multi-Segment Foot Model. Part I: Model Repeatability And Kinematic Validity, Dustin A. Bruening, Kevin M. Cooney, Frank L. Buczek
Analysis Of A Kinetic Multi-Segment Foot Model. Part I: Model Repeatability And Kinematic Validity, Dustin A. Bruening, Kevin M. Cooney, Frank L. Buczek
Faculty Publications
Kinematic multi-segment foot models are still evolving, but have seen increased use in clinical and research settings. The addition of kinetics may increase knowledge of foot and ankle function as well as influence multi-segment foot model evolution; however, previous kinetic models are too complex for clinical use. In this study we present a three-segment kinetic foot model and thorough evaluation of model performance during normal gait. In this first of two companion papers, model reference frames and joint centers are analyzed for repeatability, joint translations are measured, segment rigidity characterized, and sample joint angles presented. Within-tester and between-tester repeatability were …
Analysis Of A Kinetic Multi-Segment Foot Model. Part Ii: Kinetics And Clinical Implications, Dustin A. Bruening, Kevin M. Cooney, Frank L. Buczek
Analysis Of A Kinetic Multi-Segment Foot Model. Part Ii: Kinetics And Clinical Implications, Dustin A. Bruening, Kevin M. Cooney, Frank L. Buczek
Faculty Publications
Kinematic multi-segment foot models have seen increased use in clinical and research settings, but the addition of kinetics has been limited and hampered by measurement limitations and modeling assumptions. In this second of two companion papers, we complete the presentation and analysis of a three segment kinetic foot model by incorporating kinetic parameters and calculating joint moments and powers. The model was tested on 17 pediatric subjects (ages 7–18 years) during normal gait. Ground reaction forces were measured using two adjacent force platforms, requiring targeted walking and the creation of two sub-models to analyze ankle, midtarsal, and 1st metatarsophalangeal joints. …
The Effects Of Indoor Track Curve Radius On Sprint Speed And Ground Reaction Forces, Jesse Tipasa Tukuafu
The Effects Of Indoor Track Curve Radius On Sprint Speed And Ground Reaction Forces, Jesse Tipasa Tukuafu
Theses and Dissertations
Sprinting on a curve is significantly slower than on a straightaway. Although the dimensions vary from track to track, indoor track curves are among the tightest curves that athletes will sprint at maximal speed. Previous studies have provided theories for how speed attenuation occurs when running on a curve. Yet, no previous research has determined how the variability of indoor track curve radii affects trained sprinters at maximal speeds. Purpose: To determine the differences in running speeds, ground time (GT), and medio-lateral (ML) impulse, with different indoor track radii. A secondary purpose was to understand the between-leg differences in GT …