Dados do Trabalho

Título

RELATIONSHIPS BETWEEN TRAINING LOADS AND SLEEP STANDARD IN YOUNG FOOTBALL PLAYERS

Introdução

Young athletes, during the pre-season and season phases, are exposed to successive periods of changes in the magnitude of training loads, which can directly affect the quantity and quality of sleep.

Objetivo

To analyze the influence of different training load magnitudes on sleep parameters and their relationship with sleep-related variables.

Métodos

13 young male soccer athletes (15.93 ±0.59 years; 68.70 ±6.12 kg; 1.75 ±0.07 m; 22.30 ±0.97 kg/m2) were evaluated during 3 weeks of training with different workload magnitudes in the pre-season period. The external training load (ETL) was verified by the PlayerLoad method, while the internal training load (ITL) was determined by the session's Subjective Perceived Exertion (RPE) method. Pulse actigraphy was used to monitor sleep. Sleep variables, including time in bed (TIB), total sleep time (TST), sleep latency (SL), wake after sleep onset (WASO) and sleep efficiency (SE) were evaluated on every night of post-workout sleep. . Repeated measures ANOVA was used to verify the effect of time. Friedman's test was used for data that did not meet normality assumptions (sleep latency). Bonferroni's post-hoc was used to verify point differences. Pearson and Spearman correlations were used to verify associations between training loads and sleep-related variables.

Resultados

Week 2 had the highest workload, with a significant increase in ETL (p < 0.001) and ITL (p < 0.001) when compared to weeks 1 and 3. In addition, there was a significant improvement in sleep parameters during the week with the highest training load (TIB: +35 min, p = 0.044; TST: +46 min, p = 0.003; SL: -5 min, p = 0.001; SE: + 3%, p = 0.019). There was a very strong correlation between ETL and ITL (r = 0.783; p < 0.001), moderate correlation between ETL and TST (r = 0.340; p = 0.037), ITL and TST (r = 0.458; p = 0.003), ITL and SE (r = 0.359; p = 0.025).

Conclusões

During a microcycle with higher loads, there is an increase in TIB, TST, SE and a reduction in SL. In addition, there was a direct and moderate correlation between training load, total sleep time and sleep efficiency.

Palavras -chave

Monitoring; Physical training; Actigraphy; Football.