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Physical function in older adults: Impacts of past and present physical activity behaviors
Örebro University, School of Health Sciences.ORCID iD: 0000-0002-5401-9255
Örebro University, School of Health Sciences.ORCID iD: 0000-0003-3793-335X
Örebro University, School of Health Sciences.ORCID iD: 0000-0002-9831-0896
2019 (English)In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 29, no 3, p. 415-421Article in journal (Refereed) Published
Abstract [en]

While physical activity (PA) may counteract age-related functional decline and loss of independence at old age, to what extent physical function is influenced by past or present PA behaviors is currently unclear. Therefore, the aim of the study was to examine relationships between both past and present PA behaviors and components of physical function in older women. A physical function score based on the 6-minute walk test, squat jump, and single-leg-stance balance was aggregated in 60 older women (65-70 years). Present PA behavior was assessed by accelerometry (Actigraph) and past leisure-time PA was self-reported, where times in sports-related activities and in walking were analyzed separately. Analysis of differences in physical function across tertiles of PA behaviors was adjusted by DXA-derived fat mass. Physical activity level at present age and engagements in sports-related activities before retirement age, excluding walking, were both associated (P < 0.05) to physical function. Time spent in PA of at least moderate intensity was associated with physical function (P < 0.05), whereas no corresponding relationships to either sedentary time or time in light intensity PA were observed. In conclusion, PA behaviors at present age and engagement in sports-related activities performed during adulthood are both related to physical function in older women. Being physically active at old age infers beneficial effects on physical function, even in individuals with a past or present sedentary lifestyle, which supports public health efforts aiming at increasing daily time in PA of at least moderate intensity to preserve physical function in older women.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019. Vol. 29, no 3, p. 415-421
Keywords [en]
aerobic capacity, aging, exercise, muscle strength, sedentary
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:oru:diva-72758DOI: 10.1111/sms.13350ISI: 000458294800011PubMedID: 30506596Scopus ID: 2-s2.0-85059033224OAI: oai:DiVA.org:oru-72758DiVA, id: diva2:1291435
Funder
Swedish National Centre for Research in Sports, P2012/102 P2014/117 P2015/120Available from: 2019-02-25 Created: 2019-02-25 Last updated: 2020-03-26Bibliographically approved
In thesis
1. Muscle mass and physical function in ageing: the effects of physical activity and healthy diet
Open this publication in new window or tab >>Muscle mass and physical function in ageing: the effects of physical activity and healthy diet
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Ageing is associated with a gradual deterioration in physical function, accompanied by a decrease in muscle mass, leading to loss of independency. In this respect, physical activity and healthy diet represent key lifestyle factors with potential to delay onset of age-related physical disability. The overall aim of the present thesis was to explore the effects of physical activity behaviours in general and resistance training (RT) in particular, with or without addition of a healthy diet (HD), on muscle mass and physical function in older community-dwelling women. A main finding was that physical activity of at least moderate intensity at old age infers beneficial effects on physical function, even in individuals with a previously sedentary lifestyle. Additionally, engagement in exercise-related activities during middleage years is linked to better physical function and higher muscle massat old age, regardless of present physical activity level. This thesis further highlights that in older women RT combined with HD rich in omega-3 polyunsaturated fatty acids elicits significant gains in muscle mass, whereas no corresponding gain was induced by RT alone. Likewise, larger improvements in muscle strength and physical function were evident in response to combined effects by RT and HD compared to RT alone. Taken together, findings from this thesis support public health efforts aiming to promote physical activity of at least moderate intensity together with a healthy diet rich in omega-3 polyunsaturated fatty acids in order to combat age-related decline in muscle mass and physical function.

Place, publisher, year, edition, pages
Örebro: Örebro University, 2020. p. 103
Series
Örebro Studies in Sport Sciences, ISSN 1654-7535 ; 32
Keywords
Healthy ageing, Sarcopenia, Dynapenia, Functional capacity, Resistance training, Omega-3 fatty acids, Muscle mass, Body fat
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:oru:diva-80056 (URN)978-91-7529-326-4 (ISBN)
Public defence
2020-04-17, Örebro universitet, Gymnastik- och idrottshuset, Hörsal G, Fakultetsgatan 1, Örebro, 13:15 (English)
Opponent
Supervisors
Available from: 2020-02-18 Created: 2020-02-18 Last updated: 2020-03-31Bibliographically approved

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Edholm, PeterNilsson, AndreasKadi, Fawzi

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