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The Relationship Between Two Tasks of Dynamic Postural Stability

Abbott, Beth (2015) The Relationship Between Two Tasks of Dynamic Postural Stability. Master's Thesis, University of Pittsburgh. (Unpublished)

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Postural stability assessments are commonly utilized in evaluating the risk of injury, measuring neuromuscular deficiencies, and quantifying improvement after intervention. Postural stability can be measured using static or dynamic tasks. Previous research has demonstrated that there is no relationship between measures of static and dynamic postural stability, proposing the theory that dynamic tasks may be more challenging in neuromuscular control. Different measures of dynamic postural stability may also vary in difficulty and their relationship should be examined.7, 41, 51, 56 The Star Excursion Balance Test (SEBT) and Dynamic Postural Stability Index (DPSI) are both assessments intended to measure dynamic postural stability, but due to methodological differences each may challenge the sensorimotor system differently.21, 32, 72 Dynamic measures should also be compared to a static task to determine if one is more strongly correlated to a Single Leg Balance Test (SLBT). It was hypothesized that the relationship between the SEBT measures and DPSI composite scores would not be significant. Additionally, it was hypothesized that the SLBT and SEBT measures would demonstrate a significantly stronger relationship than the relationship between the SLBT and DPSI composite scores.
Twenty-one healthy, active participants volunteered to participate in this study. Each participant performed postural stability testing including the SLBT, SEBT and DPSI jump task. A correlation coefficient was calculated between SEBT measurements and DPSI composite scores. The relationship was not significant (r = 0.145, p = 0.554), indicating that scores from the two different dynamic tasks are not comparable and are potentially measuring different components of the sensorimotor system. The relationship between the SLBT and SEBT (r = 0.339, p = 0.156) was not significantly different from the relationship between the SLBT and DPSI (r = -0.035, p = 0.887; t = 1.443, p = 0.168). While postural stability assessments may not differ in difficulty, these findings help support the theory that different types of postural stability assessments are measuring different aspects of postural control. The outcomes from this study should validate the comprehensive use of multiple, differing postural stability tasks when measuring postural stability, and also when using tasks as a part of neuromuscular training.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Abbott, Bethbaa75@pitt.eduBAA75
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairAbt, John Pjabt@pitt.eduJABT
Committee MemberSell, Timothy Ctcs15@pitt.eduTCS15
Committee MemberLovalekar, Mita Tmital@pitt.eduMITAL
Committee MemberHeebner, Nicholasnrh13@pitt.eduNRH13
Date: 28 September 2015
Date Type: Publication
Defense Date: 8 May 2015
Approval Date: 28 September 2015
Submission Date: 8 July 2015
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 93
Institution: University of Pittsburgh
Schools and Programs: School of Health and Rehabilitation Sciences > Sports Medicine and Nutrition
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: postural stability, balance, star excursion balance test, dynamic postural stability index, dynamic postural stability, static postural stability
Date Deposited: 28 Sep 2015 19:51
Last Modified: 15 Nov 2016 14:29


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