Balance Measures for Discriminating between Functionally Unstable and Stable Ankles

Ross, Scott E.; Guskiewicz, Kevin M.; Gross, Michael T.; Yu, Bing

doi:10.1249/mss.0b013e3181872d89

Cited by 120 publications

(156 citation statements)

References 36 publications

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“…(2) The mean absolute COP sway ('COP sway'), which is the mean absolute distance of the COP trajectory to the average COP position [3,31]. (3) The mean absolute horizontal GRF ('Hor GRF'), which is the mean length of the GRF vector in the horizontal plane [15,29].…”

Section: Discussionmentioning

confidence: 99%

“…The COP speed has been able to discriminate between subjects with functional ankle instability and healthy controls [15]. Moreover, COP speed was significantly larger for subjects with chronic ankle instability, than for copers and healthy controls [22].…”

Section: Introductionmentioning

confidence: 89%

“…Since impact forces are high, DPSI emphasizes more the landing rather than the stabilizing phase [13]. Both TTS and DPSI have shown higher outcome values for subjects with chronic ankle instability [14][15][16], or with ACL reconstruction [17,18], compared to healthy controls. However, their applicability with regard to injury risk and monitoring of rehabilitation still needs to be elucidated [6,13,19,20].…”

Section: Introductionmentioning

confidence: 99%

“…Center of pressure (COP) derivatives, such as 'COP speed' and 'COP sway', have been shown to be highly reliable and valid in single leg balance performance [15,21,22]. The COP speed has been able to discriminate between subjects with functional ankle instability and healthy controls [15].…”

Section: Introductionmentioning

confidence: 99%

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Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

et al. 2016

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A B S T R A C TThe single leg drop jump landing test may assess dynamic and static balance abilities in different phases of the landing. However objective definitions of different phases following landing and associated reliability are lacking.Therefore, we determined the existence of possible distinct phases of single leg drop jump landing on a force plate in 82 elite youth soccer players. Three outcome measures were calculated over moving windows of five sizes: center of pressure (COP) speed, COP sway and horizontal ground reaction force (GRF).Per outcome measure, a Factor Analysis was employed with all windows as input variables. It showed that four factors (patterns of variance) largely (>75%) explained the variance across subjects/trials along the 12 s time series. Each factor was highly associated with a distinct phase of the time series signal: dynamic (0.4-2.7 s), late dynamic (2.5-5.0 s), static 1 (5.0-8.3 s) and static 2 (8.1-11.7 s).Intra-class correlations (ICC) between trials were lower for the dynamic phases (0.45-0.68) than for the static phases (0.60-0.86). The COP speed showed higher ICC's (0.63-0.86) than COP sway (0.45-0.61) and GRF (0.57-0.71) for all four phases.In conclusion, following a drop jump landing unique information is available in four distinct phases. The COP speed is most reliable, with higher reliability in the static phases compared to the dynamic phases. Future studies should assess the sensitivity of information from dynamic, late dynamic and static phases.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

et al. 2016

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“…Bislang besteht jedoch kein Konsens bez. der Messverfahren mit dem höchsten diagnostischen Wert zur Identifikation von Defiziten der Haltungskontrolle [25,28,29]. …”

Section: Propriozeptionunclassified

Beeinträchtigungen der sensomotorischen Kontrolle bei funktioneller Sprunggelenkinstabilität

Steib

Pfeifer

2015

Z Orthop Unfall

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!Lateral ankle sprains are among the most common sports injuries, with a prevalence of 25 to 30 % of all injuries. At least one-third of individuals develop long-term complaints and chronic instabilities at the ankle, which in many cases cannot be attributed to mechanical insufficiencies of the joint. This condition is referred to as functional ankle instability (FAI). Impairments of the sensorimotor control system, such as disturbed proprioception and postural control, as well as reduced muscle strength and reflex activity, have been suggested to contribute to the aetiology of FAI. This review summarises the current body of literature regarding sensorimotor control in individuals with FAI. We discuss the results in the context of current neurophysiological models of the development of functional joint instabilities.

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Functional donor site morbidity longer than one year after fibula free flap: A prospective biomechanical analysis

et al. 2017

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Balance Measures for Discriminating between Functionally Unstable and Stable Ankles

Abstract: Although 10 measures identified group differences, M/L GRF SD and A/P time to stabilization were the most accurate in discriminating between ankle groups. These results provide evidence for choosing these GRF measures for evaluating static and dynamic balance deficits associated with FAI.

Cited by 120 publications

References 36 publications

Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

Time series of ground reaction forces following a single leg drop jump landing in elite youth soccer players consist of four distinct phases

Beeinträchtigungen der sensomotorischen Kontrolle bei funktioneller Sprunggelenkinstabilität

Functional donor site morbidity longer than one year after fibula free flap: A prospective biomechanical analysis

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