Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Faculty of Health and Social Sciences | en_US |
| dc.contributor.advisor | Tsang, William (FHSS) | - |
| dc.contributor.advisor | Chow, Daniel (FHSS) | - |
| dc.creator | Lui, Ming Fung Godfrey | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/8938 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | Randomized controlled trial of the single-dose effect of melatonin on postural control and concurrent cognitive performance | en_US |
| dcterms.abstract | Introduction: The release of endogenous melatonin declines with age. However, melatonin is an easily accessible dietary supplement for older adults with sleeping difficulties. Dual-tasking is a common daily activity that often requires extra attentional resources, especially in older adults. Falling downstairs is a leading cause of accidental death. Studies of the effect of melatonin on postural control after stepping down while performing a concurrent auditory response task are limited; therefore, this study was performed to investigate postural control after stepping down while dual-tasking with or without the administration of melatonin. Method: A randomized, double-blind, placebo-controlled, cross-over study was conducted in 34 older adults, who performed (1) an auditory Stroop test, (2) a stepping-down task, (3) a stepping-down task with a concurrent auditory response, and (4) a 30-second double-leg stance on a foam rubber mat with the eyes open, both before and 1 hour after taking either melatonin or a placebo (randomly assigned). A 7-day washout period was provided between assessment occasions. A two-way repeated-measures analysis of variance was conducted to analyze the interactive effects of treatment and time. Results: A statistically significant difference was found in the sway area before and 1 hour after melatonin administration while dual-tasking and in the 30-second double-leg stance with eyes open. However, no statistically significant difference was seen in cognitive task performance. Discussion and Conclusions: Melatonin decreases postural control in older adults when dual-tasking and when performing a 30-second double-leg stance with eyes open. Because melatonin is easily accessible, safety precautions should be taken with those who have a risk of postural imbalance and are prone to falls. | en_US |
| dcterms.extent | xiii, 121 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2016 | en_US |
| dcterms.educationalLevel | All Doctorate | en_US |
| dcterms.educationalLevel | DHSc | en_US |
| dcterms.LCSH | Melatonin -- Physiological effect. | en_US |
| dcterms.LCSH | Melatonin -- Therapeutic use. | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b29616992.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.28 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/8938