exhibited by children who are overweight are not well documented. The purpose of this study was to compare the sagittal plane kinematics and kinetics of the ankle, knee, and hip joints during the countermovement vertical jump between children who are overweight and normal weight. It was hypothesized that
Search Results
Children Who Are Overweight Display Altered Vertical Jump Kinematics and Kinetics From Children Who Are Not Overweight
Jeffrey C. Cowley, Steven T. McCaw, Kelly R. Laurson, and Michael R. Torry
Comparing Knee Kinetics and Kinematics in Healthy Individuals and Those With Knee Osteoarthritis, With and Without Flat Feet
Maryam Sohrabi, Giti Torkaman, and Fariba Bahrami
and kinetics in individuals with KOA, in comparison to age-matched asymptomatic individuals. The results showed no significant interaction of group × foot posture in the frontal plane variables such as P1KAM, P2KAM, TP1KAM, and KAAI. Previous studies have highlighted the link between knee pain and KAM
Comparison of Concurrent and Asynchronous Running Kinematics and Kinetics From Marker-Based and Markerless Motion Capture Under Varying Clothing Conditions
Robert M. Kanko, Jereme B. Outerleys, Elise K. Laende, W. Scott Selbie, and Kevin J. Deluzio
_File” pipeline command, allowing these signals to be used with the markerless kinematics to obtain joint kinetics and create force-based gait events. Analog signals were filtered using a low-pass critically damped filter with a cutoff frequency of 20 Hz to match the kinematic filter cutoff frequency, 10 and the
Lower-Extremity Energetic Distribution During Rate-Controlled Ballet Jumps (Sautés) in Healthy Dancers
Amanda C. Yamaguchi, Lindsey H. Trejo, Hai-Jung Steffi Shih, David Ortiz-Weissberg, and Kornelia Kulig
with lesser contribution from the hip joint. 5 – 8 This strict adherence to a movement pattern may come at an energetic cost, reflected in joint kinetics. Kinetics may provide insight on how esthetics is achieved during dance jumps. Previous kinetic dance jump studies have confirmed that all 3 major
Effect of Instability and Resistance on Unintentional Squat-Lifting Kinetics
Eric J. Drinkwater, Erica J. Pritchett, and David G. Behm
Context:
Resistance training while using an instability-training device is known to increase activation of stabilizing muscle groups while decreasing the force generated by the prime movers during isometric contractions.
Purpose:
To investigate differences in squat kinetics during dynamic resistance training in an increasingly unstable training environment.
Methods:
Fourteen active men participated in this study. In each testing session, each participant performed 3 repetitions of squats with a 10-repetition maximum (10-RM) resistance, 40% of their 10-RM resistance, and 20.45 kg. The 3 testing session consisted of standing on a stable foor, foam pads, or BOSU balls. All repetitions were recorded with an optical encoder to record barbell kinetics.
Results:
The transition from stable (floor) to very unstable (BOSU) resulted in high likelihoods (>75%) of clinically meaningful differences ranging from small to large (effect size [ES] 0.31–1.73) in factors relating to concentric kinetics, eccentric power, and squat depth, regardless of the resistance used for training. There were also likely differences at the heaviest resistance in peak concentric power (stable to foam: ES 2.06; foam to BOSU: ES 0.38), eccentric power (stable to foam: ES 1.88; foam to BOSU: ES 0.74), and squat depth (stable to foam: ES 0.50; foam to BOSU: ES 0.67).
Conclusions:
Resistance training in an unstable environment at an intensity sufficient to elicit strength gains of the prime movers results in deleterious effects in concentric squat kinetics and squat technique. Such observations are particularly evident on very unstable platforms.
Ankle and Midfoot Power During Walking and Stair Ascent in Healthy Adults
Frank E. DiLiberto, Deborah A. Nawoczenski, and Jeff Houck
power to walking. 5 Nonetheless, although many studies focus on multisegment kinematics, 6 relatively few studies explore ankle and midfoot power generation. 7 – 11 In vivo multisegment foot modeling approaches measuring both ankle and midfoot kinetics, in the form of power, have been assessed during
Effects of Anterior Knee Displacement During Squatting on Patellofemoral Joint Stress
Thomas W. Kernozek, Naghmeh Gheidi, Matthew Zellmer, Jordan Hove, Becky L. Heinert, and Michael R. Torry
technique. Fry et al 19 and Lorenzetti et al 22 similarly reported that hip-extensor moments increased when anterior knee displacement was limited. Differences in ankle kinematics and kinetics occurred between squatting techniques (Table 1 ). Limiting anterior knee translation appeared to allow the lower
Altered Vertical Ground Reaction Force Components While Walking in Individuals With Chronic Ankle Instability
Erik A. Wikstrom, Kyeongtak Song, Kimmery Migel, and Chris J. Hass
assist with treatment development to slow ankle joint degradation. Altered kinetics during walking 20 have been noted in individuals with CAI and during more intense physical activities such as running 6 and jump landing; those with CAI have higher vGRF and loading rates, relative to healthy controls
Immediate Effects of Manipulating Footwear or Cadence on the Lower Limb Biomechanics of Female Masters Runners
Jean-Francois Esculier, Jesse M. Charlton, Natasha M. Krowchuk, Julia De Pieri, and Michael A. Hunt
considered large. 31 A significant omnibus test prompted pairwise comparisons using the Durbin-Conovor test. Alpha was set at .05 for all tests. Statistical analyses were performed using JAMOVI (The JAMOVI project, version 1.1.8). Results Kinetics Compared to HAB, median values of AVLR were significantly
Comparing Leg Quasi-Stiffness Methods Across Running Velocities
John Kuzmeski, Gillian Weir, Travis Johnson, Matthew Salzano, and Joseph Hamill
in leg length values when compared with direct kinematic methods. References 1. Arampatzis A , Brüggemann GP , Metzler V . The effect of speed on leg stiffness and joint kinetics in human running . J Biomech . 1999 ; 32 ( 12 ): 1349 – 1353 . doi:10.1016/s0021-9290(99)00133-5 10569714 10
