Shot efficacy in the NBA: A multifactorial analysis
Fecha
2009Disciplina/s
Actividad Física y DeporteMateria/s
BasketballNBA
Baloncesto
Efficacy
Lanzamiento
Shot
Notational analysis
Eficacia
Análisis notacional
Resumen
The aim of this research was to analyze shot efficacy in basketball. Examining the relationship that exists between shot efficacy and a series of variables registered during this action. The sample was constituted a total of 8471 shots (217.2±25.4) of 39 games of NBA league. 21.4% of the analyzed shot were free throws, 62.8% were 2-point field goal and 15.7% were 3-point field goal. A significant relationship existed only between shot efficacy and the player position that took the shot the free throw (H2(4,N= 1457)= 12.61, p<.01). Point guard and small forwards had higher efficacy than centers. Field goals, in 2- and 3-point shots, the following relationships were found: i) between efficacy and period (H2(8,N= 6654) = 22.76, p< .005); ii) between efficacy and quarter (H2(16,N= 6091)= 48.70, p< .001); iii) between efficacy and technique (H2(44,N= 6654) = 903.54, p< .001); iv) between efficacy and defensive pressure (H2(28,N= 6654) = 13544.6, p< .001); v) between efficacy and zone from w... El objetivo de este estudio fue analizar la eficacia de los lanzamientos a canasta en baloncesto. Se exa-minó la relación existente entre la eficacia del tiro a canasta y una serie de variables registradas durante la acción del lanzamiento. La muestra estuvo constituida por un total de 8.471 lanzamientos (217,2±25,4), de 39 partidos de la NBA. El 21,4% de los lanzamientos analizados fueron de 1 punto, el 62,8% de 2 puntos y el 15,7% de 3 puntos. Existe relación estadística signi-ficativa entre la eficacia y el rol del jugador (H2(4, N= 1.457)= 12,61, p<0,01) en los lanzamientos de 1 punto. Los bases y aleros tienen una eficacia mayor que los pívots. En los lanzamientos de campo, 2 y 3 puntos, la efica-cia está relacionada con: i) Período (H2(8, N= 6.654) = 22,76, p< 0,005); ii) Cuarto (H2(16, N= 6.091) = 48,70, p< 0,001); iii) Gestoforma (H2(44, N= 6.654) = 903,54, p< 0,001); iv) Presión defensiva (H2(28, N= 6.654) = 13.544,6, p< 0,001); v) ...