Fatigue in U12 Soccer-7 Players During Repeated 1-Day Tournament Games: A Pilot Study

• Autores: Javier Sánchez Sánchez, Mario Sánchez García, Daniel Hernández, Rodrigo Ramírez Campillo, Cristian Martínez Salazar, Fábio Yuzo Nakamura
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 33, Nº. 11, 2019, págs. 3092-3097
• Idioma: inglés
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• Dialnet Métricas: 10 Citas
• Resumen

  • The aim of this study was to describe and compare the distances and displacement speeds of U12 Soccer-7 athletes during 4 tournament Soccer-7 games (TG) played in less than 24 hours (experimental condition) with those recorded during 2 league Soccer-7 games (LG) with 24 hours of rest before the match (control condition). Ten participants (age = 10.3 +/- 0.5 years) were recruited for the study. Main data analyzed during games included distance completed relative to match duration (Drel), maximal velocity, and distance completed at different running speeds (including acceleration, deceleration, standing, walking, jogging, medium-intensity running, high-intensity running, and sprinting). For data collection during games, athletes wore a global positioning system unit. Different (p <= 0.05) mean playing time was recorded during TG and LG (15.1 and 31.8 minutes/match, respectively). Drel during the 4 TG was maintained between 85.7 +/- 8.5 and 87.5 +/- 8.5 m[middle dot]min-1 (p > 0.05) and during the 2 LG between 84.2 +/- 10.9 and 87.5 +/- 9.9 m[middle dot]min-1 (p > 0.05). Moreover, similar Drel was recorded during TG and LG (86.8 and 85.9 m[middle dot]min-1, respectively). Compared with LG, during TG, maximal velocity was lower (23.0 and 21.3 km[middle dot]h-1, respectively; p <= 0.05). In addition, compared with the last game of the tournament, in the preceding games, the distance covered at low speeds (3.1-8.0 km[middle dot]h-1) was lower (37.7 and 32.4%, respectively; p <= 0.05) and at high speeds (>=18.1 km[middle dot]h-1) tends to be higher (2.5 and 3.3%, respectively). Therefore, compared with the control condition, accumulated Soccer-7 games with less than 24 hours of interday rest negatively affect displacement speed distribution (but not overall relative distances) in U12 Soccer-7 athletes. These results may help to better plan training and competition schedules to youth players.