Ruiz JR, Ramirez-Lechuga J, Ortega FB, Castro-Piñero J, Benitez JM, Arauzo-Azofra A, Sanchez C, Sjöström M, Castillo MJ, Gutierrez A, Zabala M; HELENA Study Group. Artificial neural network-based equation for estimating VO2max from the 20 m shuttle run test in adolescents.  Artif Intell Med. 2008 Nov;44(3):233-45.

Rizzo NS, Ruiz JR, Oja L, Veidebaum T, Sjöström M. Associations between physical activity, body fat, and insulin resistance (homeostasis model assessment) in adolescents: the European Youth Heart Study. Am J Clin Nutr. 2008 Mar;87(3):586-92.

Ortega FB, Ruiz JR, Labayen I, Redondo C, Breidenassel C, Gómez S, Moreno LA, Castillo MJ; Avena Study Group. High fitness is associated with a healthier programming of body composition at adolescence. Am J Hum Biol. 2008 Nov-Dec;20(6):732-4.

Ortega FB, Ruiz JR, Castillo MJ, Sjöström M. Physical fitness in childhood and adolescence: a powerful marker of health. Int J Obes (Lond). 2008 Jan;32(1):1-11. Epub 2007 Dec 4. Review.

Ortega FB, Ruiz JR, Hurtig, A, Sjöström M. Los adolescentes físicamente activos presentan una mayor probabilidad de tener una capacidad cardiovascular saludable independientemente del grado de adiposidad. The European Youth Heart Study. Rev Esp Cardiol. 2008;61(2):123-9.

Ortega FB, Artero EG, Ruiz JR, Vicente-Rodriguez G, Bergman P, Hagströmer M, Ottevaere C, Nagy E, Konsta O, Rey-López JP, Polito A, Dietrich S, Plada M, Béghin L, Manios Y, Sjöström M, Castillo MJ; HELENA Study Group. Reliability of health-related physical fitness tests in European adolescents. The HELENA Study. Int J Obes (Lond). 2008 Nov;32 Suppl 5:S49-57.

Ortega FB, Ruiz JR, Castillo MJ, Moreno LA, Urzanqui A, González-Gross M, Sjöström M, Gutiérrez A; AVENA Study Group. Health-related physical fitness according to chronological and biological age in adolescents. The AVENA study.J Sports Med Phys Fitness. 2008 Sep;48(3):371-9.

Ruiz JR, Ortega FB, Wärnberg J, Moreno LA, Carrero JJ, Gonzalez-Gross M, Marcos A, Gutierrez A, Sjöström M. Inflammatory proteins and muscle strength in adolescents: the Avena study. Arch Pediatr Adolesc Med. 2008 May;162(5):462-8.

Ortega FB, Ruiz JR, Vicente-Rodríguez G, Sjöström M. Central adiposity in 9- and 15-year-old Swedish children from the European Youth Heart Study. Int J Pediatr Obes. 2008;3(4):212-6.

Ruiz JR, España-Romero V, Ortega FB,  Sjöström M, Castillo MJ, Gutierrez A on behalf of the HELENA Study Group.
Hand-size influences optimal grip span in young healthy subjects. J Hand Surg 2006; 31A: 1367-1372.

Ruiz JR, Ortega FB, Gutiérrez A, Meusel D, Sjöström M, Castillo MJ.
Health-related fitness assessment in childhood and adolescence: a European approach based on the AVENA, EYHS and HELENA studies. J Public Health 2006; 14: 269-277.

Moreno LA, Kersting M, de Henauw S, González-Gross M, Sichert-Hellert W, Matthys C, Mesana MI, Ross N. How to measure dietary intake and food habits in adolescence? – the European perspective. Int J Obes Relat Metab Disord 2005; 29 (Suppl 2): S66-S77.

De Henauw S, Gottrand F, De Bourdeaudhuij I, Gonzalez-Gross M, Leclercq C, Kafatos A, Molnar D, Marcos A, Castillo M, Dallongeville J, Gilbert C, Bergman P, Widhalm K, Manios Y, Breidenassel C, Kersting M, Moreno LA on behalf of the HELENA Study Group.Nutritional status and lifestyles of adolescents in a public health perspective. The HELENA Project - Healthy Lifestyle in Europe by Nutrition in Adolescence. J Publ Health 2007; 15: 187-197.

Enrique García-Artero, Francisco B Ortega, Jonatan R Ruiz, José L Mesa, Manuel Delgado, Marcela González-Gross, Miguel García-Fuentes, Germán Vicente-Rodríguez, Ángel Gutiérrez y Manuel J Castillo.El perfil lipídico-metabólico en los adolescentes está más influido por la condición física que por la actividad física (estudio AVENA) Rev Esp Cardiol 2007; 60: 581 - 588.

Casajús JA, Leiva MT, Ferrando JA, Moreno LA, Aragonés MT and Ara, I.
Relación entre la condición física cardiovascular y la distribución de grasa en niños y adolescentes. Apunts Medicina del ’esport. 2006; 149:7-14.

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