Measurement of broad jump is a simple, economical and non-invasive test that provides valuable information on muscular strength and power in youth lower limbs,and has been shown to be related to bone health..

Casajús, J.A.

González de Agüero, A.

Gómez-Bruton, A.

Gómez-Cabello, A.

Julián-Almarcegui, C.

Lozano-Berges, G.

Matute-Llorente, A.

Vicente-Rodríguez, G.

English

Repositorio Universidad de Zaragoza

CCD 25 - SUPLEMENTO I AÑO 10 I VOLUMEN 9 I MURCIA 2014 I ISSN: 1696-5043NSCA IV INTERNATIONAL CONFERENCE 2014  HUMAN PERFORMANCE DEVELOPMENT THROUGH STRENGTH AND CONDITIONINGS182C C DPosterKEY WORDSBone strength, Swimmers, Adolescents, peripheral quan-titative computed tomography (pQCT).INTRODUCTIONMeasurement of broad jump is a simple, economical and non-invasive test that provides valuable information on muscular strength and power in youth lower limbs(1),and has been shown to be related to bone health(2). A recent re-view focusing on bone health in swimmers (3)showed that adolescent swimmers present lower bone mineral density than sedentary controls, and therefore might be at a higher risk of suffering bone fractures. Thus, the aim of this study was to ascertain whether a relationship between distance jumped in broad jump and bone strength indexesactually exists in adolescent swimmers. METHODSPeripheral quantitative computed tomography (pQCT) measurements were taken at the tibia of 73 adolescent swimmers (32 girls) from 12 to 18 years. Stress strain in-dex (SSI), and resistance to fracture load (FRC_LD) were calculated in X and Y axis. Bone strength index (BSI) and polar strength strain index (SSIPol), which is an estimate of bone strength to bending and torsion were also calculated. Three broad jumps were performed by each participant and the distance jumped (cm) recorded by the same researcher being the best performance (i.e. longest distance) selected for the analyses. Age-controlled partial correlations were applied to identify possible relationships between bone strength variables anddistance in broad jump. RESULTSAll bone strength indexesshowed medium correla-tions with distance in broad jump (from r=0.42to r=0.50, p<0.05). CONCLUSIONDistance in broad jump, could be used as a predictor to determinate whether an adolescent swimmer might be at higher risk of bone fracture. This finding is of special importance due to the weaker bone that this population presents (3), making initial screening of extreme importance. REFERENCES1. Ruiz JR, Castro-Pinero J, Espana-Romero V, Artero EG, Ortega FB, Cuenca MM, et al. Field-based fitness assessment in young people: the ALPHA health-related fitness test battery for children and adolescents. Br J Sports Med. 2011 May;45(6):518-24. 2. Baptista F, Barrigas C, Vieira F, Santa-Clara H, Homens PM, Fragoso I, et al. The role of lean body mass and physical activity in bone health in children. J Bone Miner Metab. 2012 Jan;30(1):100-8. 3. Gómez-Bruton A, González-Agüero A, Gómez-Cabello A, Casajús JA, Vicente-Rodríguez G. Is bone tissue really affected by swimming? A sys-tematic review. PLoS One. 2013;8(8):e70119.BONE STRENGTH INDEX AT TIBIA AND STANDING BROAD JUMP  IN ADOLESCENT SWIMMERSGonzález-Agüero, A.1,3, Gómez-Bruton, A.1, Matute-Llorente, A.1, Julián-Almarcegui, C.1, Lozano-Berges G.1, Gómez-Cabello, A.1,2, Casajús J.A1, Vicente-Rodríguez, G.1GENUD Research Group, University of Zaragoza, Zaragoza, Spain.Centro Universitario de la defensa, Zaragoza, Spain.Department of Sport and Exercise Science, Aberystwyth University, UK.

Bone strength index at Tibia and standing broad jump in adolescent swimmers

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Bone strength index at Tibia and standing broad jump in adolescent swimmers

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