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Distinct effects of acute exercise and breaks in sitting on working memory and executive function in older adults: a three-arm, randomised cross-over trial to evaluate the effects of exercise with and without breaks in sitting on cognition
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2019 (Engelska)Ingår i: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480Artikel i tidskrift (Refereegranskat) Epub ahead of print
Abstract [en]

Background

Sedentary behaviour is associated with impaired cognition, whereas exercise can acutely improve cognition.

Objective

We compared the effects of a morning bout of moderate-intensity exercise, with and without subsequent light-intensity walking breaks from sitting, on cognition in older adults.

Methods

Sedentary overweight/obese older adults with normal cognitive function (n=67, 67±7 years, 31.2±4.1 kg/m2 ) completed three conditions (6-day washout): SIT (sitting): uninterrupted sitting (8 hours, control); EX+SIT (exercise + sitting): sitting (1 hour), moderate-intensity walking (30min), uninterrupted sitting (6.5 hours); and EX+BR (exercise + breaks): sitting (1 hour), moderate-intensity walking (30min), sitting interrupted every 30min with 3min of light-intensity walking (6.5 hours). Cognitive testing (Cogstate) was completed at four time points assessing psychomotor function, attention, executive function, visual learning and working memory. Serum brain-derived neurotrophic growth factor (BDNF) was assessed at six time points. The 8-hour net area under the curve (AUC) was calculated for each outcome.

Results

Working memory net AUC z-score·hour (95%CI) was improved in EX+BR with a z-score of +28 (−26 to +81), relative to SIT, −25 (−79 to +29, p=0.04 vs EX+BR). Executive function net AUC was improved in EX+SIT, −8 (− 71 to +55), relative to SIT, −80 (−142 to −17, p=0.03 vs EX+SIT). Serum BDNF net AUC ng/mL·hour (95%CI) was increased in both EX+SIT, +171 (−449 to +791, p=0.03 vs SIT), and EX+BR, +139 (−481 to +759, p=0.045 vs SIT), relative to SIT, −227 (−851 to +396).

Conclusion

A morning bout of moderate-intensity exercise improves serum BDNF and working memory or executive function in older adults, depending on whether or not subsequent sitting is also interrupted with intermittent light-intensity walking.

Ort, förlag, år, upplaga, sidor
2019.
Nationell ämneskategori
Psykologi (exklusive tillämpad psykologi)
Identifikatorer
URN: urn:nbn:se:umu:diva-158792DOI: 10.1136/bjsports-2018-100168PubMedID: 31036563OAI: oai:DiVA.org:umu-158792DiVA, id: diva2:1314400
Tillgänglig från: 2019-05-08 Skapad: 2019-05-08 Senast uppdaterad: 2019-05-27

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Wennberg, PatrikBoraxbekk, Carl-Johan

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Wennberg, PatrikBoraxbekk, Carl-Johan
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Institutionen för folkhälsa och klinisk medicinEnheten för demografi och åldrandeforskning (CEDAR)
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British Journal of Sports Medicine
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