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- Hou, Meijun, et al.
(författare)
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Human dopaminergic system in the exercise-cognition link
- 2024
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Ingår i: Trends in Molecular Medicine. - : Elsevier. - 1471-4914 .- 1471-499X.
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Tidskriftsartikel (refereegranskat)abstract
- While the dopaminergic system is important for cognitive processes, it is also sensitive to the influence of physical activity (PA). We summarize current evidence on whether PA-related changes in the human dopaminergic system are associated with alterations in cognitive performance, discuss recent advances, and highlight challenges and opportunities for future research.
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| 2. |
- Mahltig, Boris, et al.
(författare)
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Hydroxyl functional polyester dendrimers as stabilizing agent for preparation of colloidal silver particles-a study in respect to antimicrobial properties and toxicity against human cells
- 2012
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Ingår i: Colloid and Polymer Science. - : Springer Science and Business Media LLC. - 0303-402X .- 1435-1536. ; 290:14, s. 1413-1421
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Tidskriftsartikel (refereegranskat)abstract
- The presented study concerns the preparation and investigation of silver particles in presence of hydroxylated polyester dendrimers used as stabilizing agent. Altogether a full series of water soluble and aliphatic bis-MPA dendrimers from first to fifth generation was used as to stabilize silver nanoparticles in situ. A special focus is set on the biological properties. The antibacterial properties of the dendrimer stabilized silver particles are tested against Escherichia coli and the toxicity against human cells is tested with the human epithelial cell line A549. Under the chosen testing arrangement, it was observed that the silver particles contain a significant antibacterial effect against E. coli. Silver particles stabilized in situ with dendrimers of higher generation seem to contain a stronger antibacterial property. No toxicity against human cells was observed for the silver particles even in case of the highest investigated silver concentration. Altogether the here prepared and investigated silver particles could offer a great potential for application as antibacterial agent with low human toxicity.
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| 3. |
- Sivaramakrishnan, Hamsini, et al.
(författare)
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“More than just a walk in the park” : A multi-stakeholder qualitative exploration of community-based walking sport programmes for middle-aged and older adults
- 2023
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Ingår i: Qualitative Research in Sport, Exercise and Health. - Abingdon : Routledge. - 2159-676X .- 2159-6778. ; 15:6, s. 772-788
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Tidskriftsartikel (refereegranskat)abstract
- In spite of the large-scale growth of walking sport (WS) programmes globally, limited research has explored the experiences of the key stakeholders involved in such programmes (i.e. decision-makers, facilitators, and players). We aimed to explore stakeholder experiences of community-based WS programmes to better understand the appeal of such sport options for middle-aged and older adults, and propose tentative recommendations for the feasibility and sustainability of these types of programmes. We conducted semi-structured interviews with 21 stakeholders who were involved with WS programmes in Australia as decision-makers, facilitators, and/or players. Data were analysed with reflexive thematic analysis. Four key themes pertaining to the WS experience were identified–‘a renewed lease of life’, ‘navigating ageing stereotypes’, ‘tension between organisational demands and players’ needs’, and ‘WS facilitators as catalysts of success’. Specifically, we found that WS participation enabled a positive ageing discourse for middle-aged and older adults. WS players had to negotiate stereotypes that, at times, were perceived as participation barriers. We also noted some tensions between the demands of sport organisations and the needs of middle-aged and older adults regarding sport participation. Finally, we also noted the importance of the facilitators’ role in increasing accessibility of, and long-term participation in, such programmes. We suggest that to offer feasible and sustainable community-based WS programmes across Australia, incompatibilities across various stakeholders’ perspectives need to be addressed. © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
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| 4. |
- Sivaramakrishnan, Hamsini, et al.
(författare)
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Predictors of intentions of adults over 35 years to participate in walking sport programs : A social-ecological mixed-methods approach
- 2023
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Ingår i: Scandinavian Journal of Medicine and Science in Sports. - Chichester, West Sussex : Wiley-Blackwell Publishing Inc.. - 0905-7188 .- 1600-0838. ; 33:8, s. 1412-1430
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Tidskriftsartikel (refereegranskat)abstract
- There is a growing need to identify acceptable and feasible opportunities to engage adults over 35 years in physical activity. Walking sports may be a potential means to engage adults in sport; however, there is limited evidence regarding appeal and feasibility to support its implementation and delivery. Using a two-step mixed-methods approach, we aimed (1) to quantitively identify significant predictors of intentions of adults over 35 years to participate in walking sports and (2) to understand why and how these identified predictors may be contextually relevant to the target group. In phase one, 282 adults over 35 years (Mage = 46.08, SD = 9.75) without prior experience of walking sports completed an online questionnaire assessing personal, psychosocial, program-related, and environmental predictors, and intentions to participate in walking sports. Hierarchical multiple linear regressions showed that perceived health status, attitudes, subjective norms, and distance of venue were significant predictors of intentions. In phase two, interviews with a subset of 17 participants indicated that, when implementing walking sport programs, program labeling, fear of the unknown, and individual differences in the appeal of walking sport warrant consideration. Together, these findings offer insight into the complex interplay of personal, psychosocial, program-related, and environmental predictors of adults' intentions to participate in walking sports. Addressing these elements of a walking sport program would make such programs more appealing to potential participants, and ultimately, more feasible and sustainable to conduct in the long run. © 2023 The Authors. Scandinavian Journal of Medicine & Science In Sports published by John Wiley & Sons Ltd.
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| 5. |
- Sivaramakrishnan, Hamsini, et al.
(författare)
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Psychosocial outcomes of sport participation for middle-aged and older adults : a systematic review and meta-analysis
- 2024
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Ingår i: International Review of Sport and Exercise Psychology. - Oxon : Routledge. - 1750-984X .- 1750-9858. ; 17:1, s. 398-419
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Tidskriftsartikel (refereegranskat)abstract
- © 2021 Informa UK Limited, trading as Taylor & Francis Group.Narrative reviews indicate psychological and social benefits of sport participation for the ageing population. However, no quantitative synthesis of quantitative studies on this topic has been conducted yet. We evaluated the magnitude and heterogeneity of the effects of sport participation on psychosocial outcomes for middle-aged and older adults (>35 years). Ten databases were searched in July 2020. Quantitative studies (k = 25) of middle-aged and older adults, measuring at least one psychosocial outcome of sport participation were included. Multilevel meta-analysis showed that the association between sport participation and psychosocial outcomes was small, yet significant. Moderation analyses revealed that the pooled effect differed according to outcome type; small to moderate associations were observed for social, positive psychological, perceived physical, and cognitive outcomes, but not for negative psychological outcomes. Risk of bias, assessed using the QualSyst tool, indicated low quality of evidence. Our findings suggest that sport participation is associated with multiple psychosocial benefits for middle-aged and older adults that appear invariant across participant-related and sport-related characteristics. We found no evidence of publication bias, but studies were underpowered and rated as low quality. Our review provides quantitative evidence for the psychosocial benefits of sport participation for adults, complementing existing qualitative research on this topic.
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