Abstract

The main aim of this study was identifying the internal demands during competition including the impact of analysis method (i.e., average vs. peak demands). A secondary aim was to analyze the effects of playing time on the internal demands (average and peak). Methods: Twenty-two professional basketball players were monitored during 11 games. The following internal workload variables were recorded as averages (i.e., value per minute considering the entire game) and peak values (i.e., greatest 1-minute window): 1) average Heart Rate (HR), peak HR, average Respiration Rate (RR), peak RR, average Ventilation (VE), peak VE, average VO2 and peak VO2. Results: Significantly higher peak values (very large effect size) for all internal variables were evident when compared to their average demand. Concerning playing time comparison, significantly greater average values were reached for large playing time group (24.54 ± 3.23 min) for all variables compared to small playing time group (14.13 ± 3.78 min). However, non-significant differences were apparent between large playing time and small playing time group at their internal PD. Conclusions: Understanding internal load demands using averages values drastically underestimates the internal peak values of games. Thus, 14 minutes of total playing time (1.5 quarters; ~37% of a game) is enough to expose to the players to internal peak demands.

Keywords: heart rate; peak demands; internal load; worst case scenario; most demanding periods.

Resumen

El principal objetivo del estudio fue comparar las demandas pico con las demandas promedio para diferentes variables de carga interna. El objetivo secundario fue analizar la influencia del tiempo de juego en las demandas de carga interna (promedio y pico). Métodos: Veintidós jugadores profesionales fueron monitorizados durante 11 partidos. Las siguientes variables de carga interna fueron registradas como promedio (e.g., valor por minuto considerando todo el partido) y valor pico (e.g., mayor valor alcanzado en una ventana de tiempo de un minuto): promedio frecuencia cardiaca (FC), FC pico, promedio de respiraciones (RR), RR pico, promedio de ventilaciones (VE), VE pico, promedio de VO2 and VO2 pico.  Resultados: Se encontraron valores significativamente más elevados para todas las variables pico comparado con los valores promedio. En relación con la comparación entre los jugadores en función del tiempo jugado, aquellos jugadores que acumularon mayor tiempo (24.54 ± 3.23 min) alcanzaron valores promedio significativamente más elevados para todas las variables analizadas comparado con el grupo que jugó menos minutos (14.13 ± 3.78 min). Sin embargo, no se encontraron diferencias significativas para las demandas pico entre ambos grupos. Conclusiones: Analizando las demandas de carga interna utilizando promedio se subestimas aquellos valores pico. Además, disputar 14 minutos de juego (1.5 cuartos; 37% del partido), es suficiente para ser expuesto a las demandas pico de carga interna.

Palabras clave: frecuencia cardiaca; demandas pico; carga interna; peor escenario; escenarios se máxima exigencia.

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