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Assessing Muscular Strength in Youth: Usefulness of Standing Long Jump as a General Index of Muscular Fitness

Castro-Piñero, José1,2; Ortega, Francisco B2,3; Artero, Enrique G3; Girela-Rejón, Maria J4; Mora, Jesús1; Sjöström, Michael2; Ruiz, Jonatan R2

Journal of Strength & Conditioning Research:
doi: 10.1519/JSC.0b013e3181ddb03d
Original Research
Abstract

Castro-Piñero, J, Ortega, FB, Artero, EG, Girela-Rejón, MJ, Mora, J, Sjöström, M, and Ruiz, JR. Assessing muscular strength in youth: usefulness of standing long jump as a general index of muscular fitness. J Strength Cond Res 24(7): 1810-1817, 2010-The purpose of the present study was to examine the association among different measures of lower body muscular strength in children, and the association between measures of lower- and upper-body muscular strength. The study population comprises 94 (45 girls) healthy Caucasian children aged 6-17 years. Children performed several lower body explosive muscular strength tests (i.e., standing long jump [SLJ], vertical jump, squat jump, and countermovement jump) and upper body muscular strength tests (i.e., throw basketball, push-ups, and isometric strength exercises). The association among the study tests was analyzed by multiple regression. The SLJ was strongly associated with other lower body muscular strength tests (R2 = 0.829-0.864), and with upper body muscular strength tests (R2 = 0.694-0.851). The SLJ test might be therefore considered a general index of muscular fitness in youth. The SLJ test is practical, time efficient, and low in cost and equipment requirements.

Author Information

1Department of Physical Education, School of Education, University of Cadiz, Puerto Real, Spain; 2Unit for Preventive Nutrition, Department of Biosciences and Nutrition at NOVUM, Karolinska Institutet, Huddinge, Sweden; 3Department of Physiology, University of Granada, Granada, Spain; and 4Department of Physical Education, School of Physical Activity and Sport Sciences, University of Granada, Granada, Spain

Address correspondence to Jose Castro-Piñero, jose.castro@uca.es.

© 2010 National Strength and Conditioning Association