Effect of time of day on soccer specific skills in children: psychological and physiological responses

Abstract

The aim of the present study was to examine the effect of time-of-day on soccer specific skills and physiological and psychological parameters in children. Ten male children soccer players (age: 14.6 ± 0.8 years; height: 1.63± 0.4 m; body-mass: 52.5 ± 4.9 kg) performed two shooting accuracy tests before and after a 10 × 20-m dribbling sprint test with 20-s of passive recovery between repetitions. The measurements were taken at 08:00h, 13:00h and 17:00h in a randomized order. Mean heart rate (HR) was monitored during the dribbling test. At the beginning of each test session, blood pressure and intra-aural temperature were measured.Likewise, children were asked to complete the profile of mood state (POMS) and the Hooper Index questionnaires. Lactate concentration ([La]) was recorded at rest, post-fifth recovery periods and post-second accuracy test. Moreover, they indicate their rating of perceived exertion score (RPE) immediately at the end of each test session. The results of the present study showed that dribbling performance was higher at 13:00h and 17:00h in comparison with 08:00h (p<0.05). Likewise, intra-aural temperature, RPE scores, depression recorded by the POMS questionnaire and the stress recorded by the Hooper questionnaire were higher in the afternoon (p<0.05). However, the fatigue during the 10 × 20-m dribbling sprint and the kicking accuracy were not affected by the time-of-day. Moreover, [La], mean HR, systolic blood pressure and diastolic blood pressure were not affected by the time-of-day. For the correlations analysis between all parameters, the statistical analysis showed significant correlation only between TT and RPE scores and between MT and RPE scores (r=0.6, p<0.05). In conclusion, shooting accuracy was not affect by the time-of-day. However, dribbling performance of children is better in the afternoon than the morning. This diurnal variation could not been explained by variation in mood or in [La], mean HR, systolic blood pressure and diastolic blood pressure.

Prevalence of Underweight and Overweight and Its Association with Physical Fitness in Egyptian Schoolchildren

“…One possible limitation for the present study was that the time of day of measurement was not taken into account. As previous studies have reported that physical and cognitive performance of children is dependent on time-of-day [39][40][41][42][43], further studies are needed to assess the physical fitness at the same daytime and during the same season.…”

Clocking In, Working Out: Circadian Regulation of Exercise Physiology

“…In highly technical sports, evidence suggests that there could be a trade-off between timing of peak cognitive physical abilities, such that measures of accuracy (i.e. in dart-throwing or soccer goal aim) may be greater earlier in the day compared with the typical evening peak in meausres of more purely physical attributes like strength, speed, and endurance [11,12]. Although it can be difficult to distinguish between the many complex and intertwined factors that influence exercise performance, morning-evening differences in swim performance are at least partly attributable to the body's internal circadian clock [13].…”

Estado emocional en jugadores jóvenes de fútbol tras varios partidos consecutivos.

“…La variable PSE ha sido eficazmente correlacionada con variables fisiológicas como la frecuencia cardíaca, lactato en sangre y desempeño técnico-táctico, 30,41,19 entre otras. La relación entre POMS y PSE en fútbol, son escasas.…”

“…Con respecto a la evaluación del estado emocional del deportista, se ha llevado a cabo mediante distintos instrumentos: Zonas Óptimas de Rendimiento Individuales emocionales (IZOF) 10 , Inventario de Ansiedad Rasgo-Estado (STAI) 11 , Inventario de Ansiedad Competitiva en el Deporte (CSAI-2) 12 , Escala de Ansiedad Deportiva (SAS) 13 , Inventario de Estado-Rasgo de Expresión de la Ira (STAXI-2) 14 y Perfil de Estados de Ánimo (POMS) 15,16 . El POMS ha sido ampliamente utilizado en fútbol 17,18,19,20 . En su forma original, estaba formado por una lista de 65 adjetivos que forman la prueba y representaban el resultado de un trabajo de repetidos análisis factoriales realizados con un total de 100 diferentes escalas de adjetivos 15 .…”

“…Un ANOVA con las puntuaciones transformadas en porcentajes, reveló un efecto principal de partido significativo en el Pre para T, F(1,19)=5,45, p<0.001, η2partial=.22, para D, F(1, 19)=4,19, p<0.02, η2partial=.18, para V, F(1, 19)=9,74, p<0.001, η2partial=.33, y para F, F(1, 19)=10,82, p<0.001, η2partial=.36. Los resultados para PSE y H, F<1, no fueron significativos.…”