Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Faculty of Health and Social Sciences | en_US |
| dc.contributor.advisor | Huang, Meizhen (RS) | en_US |
| dc.creator | Wang, Quan | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/14188 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Effects of low-volume high-intensity interval training versus moderate-intensity continuous training on physical performance in older adults with possible sarcopenia | en_US |
| dcterms.abstract | Background: Sarcopenia is an aging-related geriatric syndrome characterized by progressive decline in muscle mass and function. Recently, a preliminary stage termed "possible sarcopenia" has been introduced. This stage is characterized by reduced muscle strength or diminished physical performance even when muscle mass is within the normal range. The definition of possible sarcopenia underscores the critical need for an early intervention. Due to the lack of effective pharmaceutical treatments, exercise emerges as the most accessible intervention for managing sarcopenia. High-intensity interval training (HIIT), a time-efficient aerobic training, has gained increasing popularity due to its positive effects on physiological outcomes, such as muscle strength and physical functions, in various populations. However, the effects of HIIT on older adults with possible sarcopenia remain underexplored. | en_US |
| dcterms.abstract | Objective: This study aimed to investigate the effects of a 7-week HIIT and moderate-intensity continuous aerobic training (MICT, i.e., traditional endurance exercise) on physical performance in older adults with possible sarcopenia. We hypothesized that HIIT would provide greater physical benefits over MICT and would be generally well-tolerated by older adults. | en_US |
| dcterms.abstract | Method: Participants were randomly allocated to the HIIT or MICT group in a 1:1 ratio, with both groups training three times per week over a 7-week period. The HIIT protocol consisted of five bouts of 1-minute high-intensity intervals (77%–90% HRmax) interspersed with 1-minute recovery periods, totaling 15 minutes of exercise per session with warm-up and cool-down, which could be defined as one set of low-volume training (approximately 13 minutes of active training). The MICT protocol involved moderate intensity (65%–76% HRmax) training lasting 20 minutes, totaling 25 minutes of exercise per session including warm-up and cool-down. Evaluations were conducted at baseline, after 4 weeks, and at the end of the 7-week intervention, and follow-up at 1 month and 3 months after the end of intervention. The primary outcome was the five times sit-to-stand test (5STS). Secondary outcomes were the 10-meter walking test, grip strength, the functional reach test, the Exercise Enjoyment Scale (EES), and the Physical Activity Enjoyment Scale (PACES) for affective valence. Data analysis was conducted following the intention-to-treat principle. A two-way time × group repeated analysis of variance was adopted. | en_US |
| dcterms.abstract | Results: Thirty older adults (age [mean ± standard deviation]: 65.97 ± 3.72 years) were randomly allocated to the HIIT (n = 15) or MICT (n = 15) group. The results revealed a significant time × group interaction effect of the 5STS completion time (p = 0.034, η² = 0.136) and comfortable walking speed (p = 0.018, η² = 0.156). Post-hoc analysis showed that the 5STS time was significantly greater in the HIIT group than in the MICT group after 7 weeks of training (HIIT: 9.35 seconds, MICT: 9.92 seconds; p = 0.037) and 3-month follow-up (HIIT: 9.59 seconds, MICT: 10.17 seconds; p = 0.043), but not after 4 weeks of training. The comfortable walking speed was significantly greater in the HIIT group than in the MICT group only after 7 weeks of training (HIIT: 1.10 m/s, MICT: 1.03 m/s; p = 0.031). The PACES and EES scores were significantly higher in the HIIT group than in the MICT group throughout the study. | en_US |
| dcterms.abstract | Conclusion: The findings suggest that a 7-week HIIT program is a time-efficient intervention that can significantly improve physical performance in older adults with possible sarcopenia compared with MICT. The HIIT group participants also reported greater exercise enjoyment than the MICT participants. | en_US |
| dcterms.extent | xiv, 140 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2025 | en_US |
| dcterms.educationalLevel | DHSc | en_US |
| dcterms.educationalLevel | All Doctorate | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 8644.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.78 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/200/14188