Supplemental material
Journal of Sports Sciences
Volume 38, 2020 - Issue 16
Physical Activity, Health and Exercise
Temporal trends in the sit-ups performance of 9,939,289 children and adolescents between 1964 and 2017
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John S. Fitzgeralda Department of Education, Health and Behavior Studies, University of North Dakota, Grand Forks, ND, USAhttps://orcid.org/0000-0001-8694-0228
https://orcid.org/0000-0001-8694-0228, Tanis J. Walcha Department of Education, Health and Behavior Studies, University of North Dakota, Grand Forks, ND, USAhttps://orcid.org/0000-0002-0557-7867
https://orcid.org/0000-0002-0557-7867, , Katia Ferrarb Alliance for Research in Exercise, Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, SA, Australiahttps://orcid.org/0000-0003-3042-9230
https://orcid.org/0000-0003-3042-9230, Justin J. Langc Centre for Surveillance and Applied Research, Public Health Agency of Canada, Ottawa, ON, Canada;d Healthy Active Living and Obesity Research Group, Children’s Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canadahttps://orcid.org/0000-0002-1768-319X
https://orcid.org/0000-0002-1768-319X, & Grant R. Tomkinsona Department of Education, Health and Behavior Studies, University of North Dakota, Grand Forks, ND, USA;b Alliance for Research in Exercise, Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, SA, AustraliaCorrespondence[email protected]
https://orcid.org/0000-0001-7601-9670
https://orcid.org/0000-0001-7601-9670 show all