The Validity of the Zebris FDM System for Measuring Static Balance

Gregory, Robert W.; Robertson, Marc

doi:10.1249/01.mss.0000518806.81237.ef

Cited by 4 publications

(4 citation statements)

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“…The platform has been demonstrated to be a valid tool for the assessment of balance in clinical and research settings. 18 Three variables were determined: time to stabilization (TTS), centre of pressure (COP-path length) and the vertical peak ground reaction force (pGRF). The dynamic cumulative average of the vertical ground reaction forces in the z-axis was calculated, based on the variations of the continuous reaction forces within a ten second time window (upon landing).…”

Section: Methodsmentioning

confidence: 99%

Are biomechanical stability deficits during unplanned single-leg landings related to specific markers of cognitive function?

Giesche

Wilke

Engeroff

et al. 2020

Journal of Science and Medicine in Sport

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Section: Methodsmentioning

confidence: 99%

Are biomechanical stability deficits during unplanned single-leg landings related to specific markers of cognitive function?

Giesche

Wilke

Engeroff

et al. 2020

Journal of Science and Medicine in Sport

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“…The landing biomechanics were assessed by a 158 × 60.5 cm capacitive pressure platform (50 Hz, Zebris FDM, Zebris Medical GmbH, Isny, Germany). Gregory and Robertson (2017) reported the Zebris FDM pressure platform to be a valid instrument to assess balance in clinical and research setting (r = 0.42-0.66).…”

Section: Discussionmentioning

confidence: 99%

Effects of Open Skill Visuomotor Choice Reaction Time Training on Unanticipated Jump-Landing Stability and Quality: A Randomized Controlled Trial

Friebe

Engeroff

Giesche

et al. 2021

Front. Hum. Neurosci.

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Adapting movements rapidly to unanticipated external stimuli is paramount for athletic performance and to prevent injuries. We investigated the effects of a 4-week open-skill choice-reaction training intervention on unanticipated jump-landings. Physically active adults (n = 37; mean age 27, standard deviation 2.7 years, 16 females, 21 males) were randomly allocated to one of two interventions or a control group (CG). Participants in the two intervention groups performed a 4-week visuomotor open skill choice reaction training, one for the upper and one for the lower extremities. Before and after the intervention, two different types of countermovement jumps with landings in split stance position were performed. In the (1) pre-planned condition, we informed the participants regarding the landing position (left or right foot in front position) before the jump. In the (2) unanticipated condition, this information was displayed after take-off (350–600 ms reaction time before landing). Outcomes were landing stability [peak vertical ground reaction force (pGRF) and time to stabilization (TTS)], and landing-related decision-making quality (measured by the number of landing errors). To measure extremity-specific effects, we documented the number of correct hits during the trained drills. A two-factorial (four repeated measures: two conditions, two time factors; three groups) ANCOVA was carried out; conditions = unanticipated versus pre-planned condition, time factors = pre versus post measurement, grouping variable = intervention allocation, co-variates = jumping time and self-report arousal. The training improved performance over the intervention period (upper extremity group: mean of correct choice reaction hits during 5 s drill: +3.0 hits, 95% confidence interval: 2.2–3.9 hits; lower extremity group: +1.6 hits, 0.6–2.6 hits). For pGRF (F = 8.4, p < 0.001) and landing errors (F = 17.1, p < 0.001) repeated measures effect occurred. Significantly more landing errors occurred within the unanticipated condition for all groups and measurement days. The effect in pGRF is mostly impacted by between-condition differences in the CG. No between-group or interaction effect was seen for these outcomes: pGRF (F = 0.4, p = 0.9; F = 2.3, p = 0.1) landing errors (F = 0.5, p = 0.6; F = 2.3, p = 0.1). TTS displayed a repeated measures (F = 4.9, p < 0.001, worse values under the unanticipated condition, improvement over time) and an interaction effect (F = 2.4, p = 0.03). Healthy adults can improve their choice reaction task performance by training. As almost no transfer to unanticipated landing successfulness or movement quality occurred, the effect seems to be task-specific. Lower-extremity reactions to unanticipated stimuli may be improved by more specific training regimens.

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“…The Zebris platform uses 11.264 micro sensors, arranged across the walking area, with a frequency of 300 Hz. It has been used as a diagnostic device for supporting several modes of operation, including static analysis while a participant is standing still [ 24 ]. The Zebris platform was connected via USB cable to an external unit (laptop).…”

Section: Methodsmentioning

confidence: 99%

Effects of Load Carriage on Postural Sway and Relative Ground Reaction Forces in Special Police Officers: A Cross-Sectional Study

Kasović

Vespalec

Štefan

2022

IJERPH

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Although excessive load carriage results in biomechanical gait changes, little evidence has been provided regarding its impact on postural sway. Therefore, the main purpose of this study was to determine whether heavier loads have effects on changing foot stability and postural sway in special police officers. Thirty male special police officers (age = 40 ± 6 years, height = 180 ± 5 cm, weight = 89 ± 8 kg) were assessed in four conditions: (1) carrying no load, (2) carrying a 5 kg load, (3) carrying a 25 kg load, and (4) carrying a 45 kg load. Foot characteristics during standing were assessed with Zebris pedobarographic pressure platform. Heavier loads increased the center of pressure (COP) path length and average velocity, length of minor and major axis, and 95% confidence ellipse area, while a decrease in angle between Y and major axis was observed. Relative forces beneath the left forefoot and right backfoot regions decreased and an increase in relative forces beneath the left backfoot and right forefoot was observed. When carrying heavy loads, static foot parameters rapidly changed, especially in COP path length and average velocity.

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The Validity of the Zebris FDM System for Measuring Static Balance

Cited by 4 publications

References 0 publications

Are biomechanical stability deficits during unplanned single-leg landings related to specific markers of cognitive function?

Are biomechanical stability deficits during unplanned single-leg landings related to specific markers of cognitive function?

Effects of Open Skill Visuomotor Choice Reaction Time Training on Unanticipated Jump-Landing Stability and Quality: A Randomized Controlled Trial

Effects of Load Carriage on Postural Sway and Relative Ground Reaction Forces in Special Police Officers: A Cross-Sectional Study

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