1. Introductory information Title: Supplemental Appendix for the article: Arterial structure in 18-year-old males is dependent on physical activity at 12-years and cumulative cardiorespiratory fitness from puberty to late adolescence Juta Kraav, Reeli Tamme, Liina Remmel, Evelin Mäestu, Maksim Zagura, Jaak Jürimäe, Vallo Tillmann AUTHOR INFORMATION Institute of Clinical Medicine, University of Tartu, 50406 Tartu, Estonia. Juta Kraav (juta.kraav@gmail.com ; ORCID: 0000-0003-4599-5606), Reeli Tamme (Reeli.Tamme@kliinikum.ee) Institute of Sports Sciences and Physiotherapy, University of Tartu, 51007 Tartu, Estonia Liina Remmel (liina.remmel@ut.ee), Evelin Mäestu (evelin.maestu@ut.ee ), Jaak Jürimäe (jaak.jurimae@ut.ee) Department of Biochemistry, Centre of Excellence for Translational Medicine, University of Tartu, Tartu, Estonia. Maksim Zagura (maksimzagura@gmail.com) Children's Clinic, Tartu University Hospital, 50406 Tartu, Estonia. Reeli Tamme, Vallo Tillmann (Vallo.Tillmann@kliinikum.ee) The Appendix contains 3 tables with detailed study results: - Table 3. Linear regression examining association between risk factors and arterial parameters at 18-years. - Table 4. Linear regression models examining association between independent variables at 12-years and arterial parameters measured at 18-years. - Table 5. Linear regression models examining association between independent variables cumulative exposure from puberty to late adolescence and arterial parameters measured at 18-years. In case of any questions regarding the tables, please contact juta.kraav@ut.ee 2. Methodological information The presented tables have been generated with using R software version 1.3.1093 for iOS. The tables list results for linear regression model analysis which was based on a dataset collected during a longitudinal prospective study performed in Estonia 2009-2018. Risk factors for metabolic syndrome in boys during pubertal development: a longitudinal study with special attention to physical activity and fitness. Study included healthy adolescent Caucasian male at the age of 9-12 attending schools in the city and the surroundings of Tartu. 3. Data specific information All abbreviations have been spelled out in the listed tables footers. Units of measurements are present in the first column of the table.