The validity of external: internal training load ratios in rested and fatigued soccer players

Purpose: To examine the relationship of external:internal training load ratios with fitness and assess the impact of fatigue. Method: Ten soccer players performed a lactate threshold test followed by two soccer simulations (BEAST90mod ) 48 h apart. Recovery (TQR) and muscle soreness (DOMS) was measured before each trial. Internal Training load (TL) (iTRIMP) and external load total distance (TD), high intensity distance (HID), PlayerLoad™ (PL) mean metabolic power (MMP) high metabolic power distance (HP) were collected for each trial and external:internal ratios produced. The relationships between ratios and velocity at lactate threshold (vLT) and velocity at Onset of Blood Lactate Accumulation (vOBLA) were examined in both trials along with changes in ratios. Results: Total Quality of Recovery and DOMS showed large changes. There were trivial to large decreases in TL from trial 1 to 2. Moderate increases in ratios for TD:iTRIMP, PL:iTRIMP and MMP:iTRIMP were seen but only small/trivial for HP:iTRIMP and HID:iTRIMP. In rested conditions all ratios show large relationships with vLT and vOBLA. However vLT vs. HID:iTRIMP; PL:iTRIMP; HP:iTRIMP and vOBLA vs. TD:iTRIMP; PL:iTRIMP; MMP:iTRIMP became weaker under fatigue. Conclusions: Acute changes in the ratios have implications forthe use of ratios as fitness measures but also as indicators of fatigue

Activity monitoring in professional soccer goalkeepers during training and match play

The purpose of the present study was to quantify the external load of professional soccer goalkeepers. Twenty professional goalkeepers participated in the study. Data were classified according to the number of days before or after the match day (MD) as follows: MD-4, MD-3, MD-2, MD-1 for the sessions before the match, and MD+1 for the session after the match. The total running distance covered (TD), the high metabolic load (HMLD), the number of high metabolic load efforts (HMLE) were progressively reduced from MD-4 to MD-1 but the values of these variables were always inferior to MD (ES: -3.79 to −1.11). There was a tendency for a progressive reduction in the number of high-intensity accelerations (ACC) and decelerations (DEC) from MD-4 to MD-1 although the values of ACC/DEC were superior to MD (ES: 0.19 to 2.05). Overall, MD-2 was the day with the lowest external load. During training sessions, starter goalkeepers performed more TD (ES: 0.36) and more HMLE (ES: 0.29) than non-starters. External load was progressively decreased in the days before match play for goalkeepers which is reflective of appropriate recovery and preparation practices within the cohort analysed. However, habitual goalkeepers training has an excess of accelerations/decelerations and a lack of running actions performed at high metabolic loads

Analysis of professional soccer games with individualized thresholds

The aim of this study is to analyse the distances travelled by professional players in friendly matches using individualized intensity thresholds and to differentiate them by specific playing positions, in order to use the results of the competition as a reference for the subsequent analysis of task and training sessions conducted using GPS technology. 21 professional field players (28 ± 3.8 years, 179 ± 4.5 cm, 4.2 kg 75.2 ±) have been monitored using 10 Spi Elite units with GPS receiver, triaxial accelerometer and integrated HR chip receiver (GPSports Systems, Pty. Ltd., 2003, Australia). The results are shown for half of the match. The total average distance covered (DTOT) has been 5052 ± 536m, the distance travelled at a speed higher than vVO2max (DAI) is 351 ± 175m, the distance above the maximum speed threshold (Dist. Z6) is 42 ± 37m. We conclude that: considering the differences observed between players and between positions on the distance travelled in different specified areas, it highlights the importance and the need to individualize the monitoring of the competition, in order to individualize the training monitoring, and properly prepare the players according to the demands of competition.No data (2012)UE

Apunts. Educació física i esports

Resumen tomado de la publicaciónDada la falta de estudios que relacionan la Frecuencia de Ciclo (Fcc) con la producción de lactato y consumo de oxígeno aplicados a la carrera a velocidades de desplazamiento superiores a las correspondientes con el umbral anaeróbico ventilatorio (VT2), se decidió la realización del presente estudio, cuyo objetivo ha sido observar las relaciones que se dan entre algunos aspectos mecánicos del desplazamiento cíclico (velocidad de desplazamiento, frecuencia y longitud de ciclo), con algunos aspectos metabólicos y cardiovasculares (lactato en sangre post esfuerzo, Vo2 y FC), para una velocidad de desplazamiento del 90 por ciento de la VMA individual, en mujeres entrenadas de nivel medio, que siguen un entrenamiento reglado y sistematizado desde hace al menos 2 años. Se realizaron tres pruebas sobre tapiz rodante, separadas entre sí al menos dos días, de una duración de seis minutos y al 90 por ciento de la VMA. Una se realizó con la frecuencia de ciclo (Fcc) libremente escogida, otra con Fcc incrementada y la tercera con la Fcc disminuida. Como conclusión, parece evidente que para la carrera en tapiz rodante al 90 por ciento de la VMA y durante 6 minutos, las pequeñas variaciones (10 por ciento) de los parámetros mecánicos modifican las necesidades de Vo2, producción de lactato y Frecuencia Cardíaca (FC) de cada sujeto. Por ello es posible que, utilizando estas variaciones en el entrenamiento diario, se puedan conseguir adaptaciones específicas más profundas que las obtenidas tan solo mediante el trabajo basado en la velocidad de desplazamiento.CataluñaUniversidad Pública de Navarra. Biblioteca; Campus de Arrosadía; 31006 Pamplona; Tel. +34948169060; Fax +34948169069; [email protected]