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Dynamic Stability of Older Adults Under Dual Task Paradigm During Stair Descent

Cui Zhang, Qipeng Song, Wei Sun, and Yu Liu

little attention has been paid to the dynamic stability of older adults during stair descent under a concurrent dual-task condition. Among various postural stability assessment methods, dynamic stability is the most comprehensive method that is used to quantify the dynamic control of the center of mass

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The Temporal Pattern of Recovery in Directional Dynamic Stability Post Football-Specific Fatigue

David Rhodes, Jill Alexander, and Matt Greig

ability is best represented. Arguably, when relating these findings to injury risk, the effected output is often the focus, relating strongly to dynamic stability responses. Dynamic stability can be quantified through various subjective or objective means, such as single-leg landing, single-leg hop and

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The Influence of Cell Phone Usage on Dynamic Stability of the Body During Walking

Hamed Shahidian, Rezaul Begg, and David C. Ackland

, which has a significant influence on gait stability due to its proportion of whole-body mass, 12 exhibits LyE values that increase during cognitive load associated with talking while walking in older-aged subjects, suggesting greater gait instability. 13 , 14 Local dynamic stability measures have

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Effects of Peroneal Muscles Fatigue on Dynamic Stability Following Lateral Hop Landing: Time to Stabilization Versus Dynamic Postural Stability Index

Kazem Malmir, Gholam Reza Olyaei, Saeed Talebian, Ali Ashraf Jamshidi, and Majid Ashraf Ganguie

Muscle fatigue may affect any part of the procedure and interfere with postural stability. Postural stability has been assessed under static and dynamic conditions. Dynamic stability, which is defined as the ability to maintain stability during movement, is considered as a prerequisite for an athlete

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Autoregressive Modeling as Diagnostic Tool to Identify Postanterior Cruciate Ligament Reconstruction Limb Asymmetry

Kristin D. Morgan

reconstructed limb compared with their nonreconstructed limb. 4 , 6 , 7 At this level, individuals possess the strength to perform more demanding tasks and can progress to exercise-based rehabilitation programs that are aimed at restoring dynamic stability. 8 , 9 Unfortunately, despite this and similar

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Sensorimotor Control of the Shoulder in Professional Volleyball Players With Isolated Infraspinatus Muscle Atrophy

Samuele Contemori, Andrea Biscarini, Fabio M. Botti, Daniele Busti, Roberto Panichi, and Vito E. Pettorossi

, no research studies have specifically assessed the static and dynamic stability of the shoulder with IIMA to reveal possible impairments in the shoulder sensory and motor control functions. Therefore, the specific aim of this study is to examine the shoulder sensorimotor control in professional

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The Effect of Jump-Landing Directions on Dynamic Stability

Kathy Liu and Gary D. Heise

Dynamic stability is often measured by time to stabilization (TTS), which is calculated from the dwindling fluctuations of ground reaction force (GRF) components over time. Common protocols of dynamic stability research have involved forward or vertical jumps, neglecting different jump-landing directions. Therefore, the purpose of the present investigation was to examine the influence of different jump-landing directions on TTS. Twenty healthy participants (9 male, 11 female; age = 28 ± 4 y; body mass = 73.3 ± 21.5 kg; body height = 173.4 ± 10.5 cm) completed the Multi-Directional Dynamic Stability Protocol hopping tasks from four different directions—forward, lateral, medial, and backward—landing single-legged onto the force plate. TTS was calculated for each component of the GRF (ap = anterior-posterior; ml = medial-lateral; v = vertical) and was based on a sequential averaging technique. All TTS measures showed a statistically significant main effect for jump-landing direction. TTSml showed significantly longer times for landings from the medial and lateral directions (medial: 4.10 ± 0.21 s, lateral: 4.24 ± 0.15 s, forward: 1.48 ± 0.59 s, backward: 1.42 ± 0.37 s), whereas TTSap showed significantly longer times for landings from the forward and backward directions (forward: 4.53 ± 0.17 s, backward: 4.34 0.35 s, medial: 1.18 ± 0.49 s, lateral: 1.11 ± 0.43 s). TTSv showed a significantly shorter time for the forward direction compared with all other landing directions (forward: 2.62 ± 0.31 s, backward: 2.82 ± 0.29 s, medial: 2.91 ± 0.31 s, lateral: 2.86 ± 0.32 s). Based on these results, multiple jump-landing directions should be considered when assessing dynamic stability.

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Acceleration and Jerk After a Jump Stabilization Task in Individuals With and Without Chronic Ankle Instability

Kyle B. Kosik, Kathryn Lucas, Matthew C. Hoch, Jacob T. Hartzell, Katherine A. Bain, and Phillip A. Gribble

. Previous researchers have demonstrated by measuring TTS that individuals with CAI take longer to stabilize during a jump stabilization task. 19 Other researchers have utilized the dynamic postural stability index to show that CAI is associated with diminished dynamic stability when landing from a jump. 18

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The Effect of Proprioceptive Training on Directional Dynamic Stabilization

David Rhodes, Mark Leather, Daniel Birdsall, and Jill Alexander

dynamic stability over a 16-week period. Methods Participants From an available squad of 23, a total of 16 elite premier league footballers were available to volunteer for the study and took part in a 16-week proprioception intervention program (age 17.60 [0.85] y, height 176.83 [9.8] cm, body mass 69

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Functional Training for the Restoration of Dynamic Stability in the PCL-Injured Knee

Paul A. Borsa, Eric L. Sauers, and Scott M. Lephart

Functional training for the purpose of restoring dynamic joint stability has received considerable interest in recent years. Contemporary functional training programs are being designed to complement, rather than replace, traditional rehabilitation protocols. The purpose of this clinical commentary is to present a management strategy for restoring dynamic stability in the posterior cruciate ligament (PCL)-injured knee. The strategy presented integrates five key concepts: (a) planned variation of exercise, (b) outcomes-based assessment, (c) kinetic chain exercise, (d) proprioception and neuromuscular control, and (e) specificity of activity. Pertinent research findings and a clinical rationale are provided for using functional training in the restoration of dynamic stability in the PCL-injured knee.