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Association between physical activity, cardiorespiratory fitness and clustered cardiovascular risk in South African children from disadvantaged communities: results from a cross-sectional study

Müller, Ivan and Walter, Cheryl and du Randt, Rosa and Aerts, Ann and Adams, Larissa and Degen, Jan and Gall, Stefanie and Joubert, Nandi and Nqweniso, Siphesihle and Des Rosiers, Sarah and Smith, Danielle and Seelig, Harald and Steinmann, Peter and Wadhwani, Christina and Probst-Hensch, Nicole and Utzinger, Jürg and Pühse, Uwe and Gerber, Markus. (2020) Association between physical activity, cardiorespiratory fitness and clustered cardiovascular risk in South African children from disadvantaged communities: results from a cross-sectional study. BMJ Open Sport & Exercise Medicine, 6 (1). e000823.

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Official URL: https://edoc.unibas.ch/78549/

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Abstract

Background/Aim: Physical inactivity is a growing global health problem and evidence suggests that physical inactivity is a key driver for cardiovascular and chronic diseases. Recent data from South Africa revealed that only about half of the children achieved recommended daily physical activity levels. Assessing the intensity of physical activity in children from low socioeconomic communities in low- and middle-income countries is important to estimate the extent of cardiovascular risk and overall impact on health. Methods: We conducted a cross-sectional survey in eight quintile three primary schools in disadvantaged communities in the Port Elizabeth region, South Africa. Children aged 10-15 years were subjected to physical activity, blood pressure, cholesterol, blood glucose and skinfold thickness assessments. Cardiovascular risk markers were converted into standardised z-scores and summed, to obtain a clustered cardiovascular risk score. Results: Overall, 650 children had complete data records. 40.8% of the children did not meet recommended physical activity levels (i.e. logged <60 min of moderate-to-vigorous physical activity per day). If quartiles were developed based on children's cardiorespiratory fitness and moderate-to-vigorous physical activity levels, a significant difference was found in clustered cardiovascular risk among children in the highest versus lowest fitness (p<0.001) or moderate-to-vigorous physical activity (p<0.001) quartiles. Conclusions: Cardiorespiratory fitness and objectively assessed physical activity are closely linked with children's clustered cardiovascular risk. Given that four out of ten South African schoolchildren from marginalised communities do not meet international physical activity recommendations, efforts should be made to ensure that promoting a physically active lifestyle is recognised as an important educational goal in primary schools.
Faculties and Departments:03 Faculty of Medicine > Departement Sport, Bewegung und Gesundheit > Bereich Sportwissenschaft > Sportwissenschaften (Pühse)
09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Former Units within Swiss TPH > Health Impact Assessment (Utzinger)
UniBasel Contributors:Müller, Iwan Martin and Walter, Cheryl and du Randt, Rosa and Aerts, Ann and Adams, Larissa and Degen, Jan and Gall, Stefanie and Joubert, Nandi and Nqweniso, Siphesihle and Des Rosiers, Sarah and Smith, Danielle and Seelig, Harald and Steinmann, Peter and Wadhwani, Christina and Probst-Hensch, Nicole and Utzinger, Jürg and Pühse, Uwe and Gerber, Markus
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:BMJ
e-ISSN:2055-7647
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:03 Nov 2021 16:05
Deposited On:03 Nov 2021 16:05

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