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Job Fransen, Thomas W.J. Lovell, Kyle J.M. Bennett, Dieter Deprez, Frederik J.A. Deconinck, Matthieu Lenoir and Aaron J. Coutts

The aim of the current study was to examine the influence of restricted visual feedback using stroboscopic eyewear on the dribbling performance of youth soccer players. Three dribble test conditions were used in a within-subjects design to measure the effect of restricted visual feedback on soccer dribbling performance in 189 youth soccer players (age: 10–18 y) classified as fast, average or slow dribblers. The results showed that limiting visual feedback increased dribble test times across all abilities. Furthermore, the largest performance decrement between stroboscopic and full vision conditions was in fast dribblers, showing that fast dribblers were most affected by reduced visual information. This may be due to a greater dependency on visual feedback at increased speeds, which may limit the ability to maintain continuous control of the ball. These findings may have important implications for the development of soccer dribbling ability.

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Karen L. Perell, Robert J. Gregor and A.M. Erika Scremin

The purpose of this sludy was to compare individual pedal reaclion force components following bicycle training with and without effective force feedback in subjects with unilateral cerebrovascular accident (CVA). Eight ambulatory subjects with CVA were studied on a recumbent bicycle equipped with custom-built pedals, which measure normal and tangential components of the load applied to the pedal surface. Comparisons of normal and tangential pedal reaction forces were made following 1 month of bicycle training (3 times/week for 4 weeks) during retention tests performed without feedback. The ratios of involved to contralateral (I/C ratios) force parameters were used to assess symmetry. Subjects were randomly assigned to 2 groups: (a) a feedback group that received visual/verbal feedback regarding effective force patterns, bilaterally, after each trial; and (b) a no-feedback group dial received no feedback. Two critical results were found: (a) tangential pedal forces were significantly more posteriorly directed bilaterally following training across all subjects, but the change was greater for the no-feedback group relative to the feedback group, and (b) effective force feedback training did not demonstrate improvements in the I/C ratios above that of the control group. A more posteriorly applied tangential pedal force may represent increased dorsiflexion and may suggest that bicycle training facilitated ankle control. The cyclical nature of cycling, however, may allow for natural patterns to develop without feedback or may require less frequent use of feedback based on retention test performance.

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Hayley M. Ericksen, Brian Pietrosimone, Phillip A. Gribble and Abbey C. Thomas

Feedback, designed to alter aberrant movement biomechanics, has proven to be an important component of injury prevention programs, which aim to decrease the risk of lower-extremity injury in sport. Interventions that incorporate feedback to teach optimal biomechanical movement patterns demonstrate

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Hyunjae Jeon and Abbey C. Thomas

biomechanics, researchers and clinicians have begun incorporating feedback of biomechanical movement patterns into PFP rehabilitation. 14 This feedback is often either verbal or visual. Notably, a single, verbal feedback session has demonstrated immediate reductions in vertical ground reaction force during

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Christina Olbrantz, Jamie Bergelin, Jill Asmus, Thomas Kernozek, Drew Rutherford and Naghmeh Gheidi

performance-based feedback is frequently attempted to alter movements such as drop landings that increase the risk of PFP. 1 , 10 A recent review on various forms of movement-based feedback concluded that a combination of verbal and visual feedback may have the greatest effect on reducing GRF during a drop

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Erika Zemková and Michal Jeleň

development of various novel forms of interventions (whole-body vibrations, task-oriented balance exercises based on visual feedback control of the center-of-mass movement, target-matching foot-stepping exercises, etc). However, it may be premature to conclude that such exercises can improve true

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Marcie Fyock, Nelson Cortes, Alex Hulse and Joel Martin

investigating real-time visual feedback as an intervention choice for the treatment of PFP in adult recreational runners. Focused Clinical Question In adult runners diagnosed with PFP, does gait retraining with real-time visual feedback lead to a decrease in pain? Summary of Search, “Best Evidence” Appraised

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Hayley M. Ericksen, Caitlin Lefevre, Brittney A. Luc-Harkey, Abbey C. Thomas, Phillip A. Gribble and Brian Pietrosimone

injury. 6 , 7 Neuromuscular training programs have been developed to improve landing mechanics and specifically decrease peak vGRF when landing from a jump. Feedback is an important component in many of these jump-landing training programs 8 – 16 and interventions which include feedback have

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Sean A. Jones, Derek N. Pamukoff, Timothy C. Mauntel, J. Troy Blackburn and Joseph B. Myers

determine the extent to which a muscle is active throughout a range of motion. 16 Furthermore, greater EMG amplitude of the serratus anterior following training programs contributes to a reduction in pain and improves shoulder function. 18 , 19 The use of clinician-directed feedback in commonly used to

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Anna M. Ifarraguerri, Danielle M. Torp, Abbey C. Thomas and Luke Donovan

Key Points ▸ Real-time video feedback caused inconsistent alterations in gait in patients with chronic ankle instability. ▸ Efficacy of other clinician cues during video feedback should be determined. ▸ Other gait retraining interventions should be considered when treating patients with chronic