ABSTRACT
Purpose: The aim of this study was to analyze the different phases of a water rescue, their influence in the whole lifesavingand if lifeguards could be differentiated according to their abilities during a water rescue.Methods: A cross-sectional study was carried out to analyze the different phases and lifeguardsabilities of a simulated water rescue of 100 m. Thirty-fourprofessional lifeguards performed the test and the time was recorded for the first phase (swimming to the victim), the second phase (towing back the victim) and the third phase (extracting the victim). A discriminant analysis was conducted in order to classifylifeguards in two groups (high or medium level of abilities during the water rescue) and the times were compared on each phase.Results: The time during the second and the third phase classify correctly the lifeguards according to their level of abilities. Lifeguards with higher level of abilities performed the water rescue significantly faster, specifically during the second (p < 0.001, ES =1.38, large) and the third phase (p =0.002, ES = 1.09, medium), but no differences were found in the first part of the water rescue (p > 0.05). Conclusion: The time of a simulated water rescue seems to bea good method to classify lifeguards according to their abilities. These findings could allow rescue teams to know the skills of their lifeguards and design strategiesin order to decrease risks and enhance lifesaving (AU)
Objetivo: Analizar las diferentes fases del rescate para conocer su influencia sobre el resultado final y categorizar a los socorristas de acuerdo a su competencia acuática.Métodos: Se realizó un estudio cruzado simulando un rescate a 100 metros con 34 socorristas, analizando las tres fases del rescate: nado hacia la víctima, traslado a tierra y extracción. Se realizó un análisis discriminante para clasificar a los socorristas según el tiempo de rescate.Resultados: La segunda y la tercera fase clasificó correctamente a los socorristas de acuerdo al tiempo empleado. La mayor competencia fue determinada especialmente en la segunda fase del salvamento (p<0,001, TE=1,38, grande) y en menor medida de la tercera fase (p=0,002, TE=1,09, mediano).Conclusión: El tiempo empleado en la segunda fase parece ser un buen método para clasificar la competencia de los socorristas durante el rescate. Estos hallazgos proporcionan información relevante para el entrenamiento y organización de equipos de rescate (AU)
Subject(s)
Humans , Male , Female , Young Adult , Rescue Personnel , Aquatic Rescue , Search and Rescue , Physical Functional Performance , Cross-Sectional StudiesABSTRACT
This study aimed to analyse the impact of high and low flexibility levels of hamstring and quadriceps muscles on physical fitness and neuromuscular properties in professional soccer players. 62 male professional soccer players participated in this study and performed 2 instrumented flexibility tests (passive straight leg raise [PSLR] and quadriceps flexibility [QF]). Anaerobic performance was assessed using countermovement jump (CMJ), Abalakov vertical jump, 20-m sprint, and Balsom agility test. A k-means cluster analysis was performed to identify a cut-off value of hamstring and quadriceps flexibility and classify players as high hamstring flexibility (HHF) and low hamstring flexibility (LHF) or high quadriceps flexibility (HQF) and low quadriceps flexibility (LQF), respectively, according to the PSLR and QF performances. The LQF players performed better than HQF on CMJ (p=0.042, ES: 0.64) and Balsom agility test (p=0.029, ES: 0.68). In addition, LQF showed higher muscular stiffness than HQF players (p=0.002, ES: 0.88). There were no significant differences between HHF and LHF groups. When pooling the HQF and LQF players' data, the Pearson's correlation showed significant moderate positive association between muscular stiffness and QF (r=0.516, p<0.001). These results support the rationale that baseline stiffness is likely to influence athletic performance rather than flexibility level in soccer players.
