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Sleep indices and cardiac autonomic activity responses during an international tournament in a youth national soccer team

journal contribution
posted on 14.07.2021, 03:11 by Pedro Figueiredo, Jülio Costa, Antonio LastellaAntonio Lastella, Joäo Morais, Joäo Brito
This study aimed to describe habitual sleep and nocturnal cardiac autonomic activity (CAA), and their relationship with training/match load in male youth soccer players during an international tournament. Eighteen elite male youth soccer players (aged 14.8 ± 0.3 years; mean ± SD) participated in the study. Sleep indices were measured using wrist actigraphy, and heart rate (HR) monitors were used to measure CAA during night-sleep throughout 5 consecutive days. Training and match loads were characterized using the session-rating of perceived exertion (s-RPE). During the five nights 8 to 17 players slept less than <8 h and only one to two players had a sleep efficiency <75%. Players’ sleep duration coefficient of variation (CV) ranged between 4 and 17%. Nocturnal heart rate variability (HRV) indices for the time-domain analyses ranged from 3.8 (95% confidence interval, 3.6; 4.0) to 4.1 ln[ms] (3.9; 4.3) and for the frequency-domain analyses ranged from 5.9 (5.6; 6.5) to 6.6 (6.3; 7.4). Time-domain HRV CV ranged from 3 to 10% and frequency-domain HRV ranged from 2 to 12%. A moderate within-subjects correlation was found between s-RPE and sleep duration [r = −0.41 (−0.62; −0.14); p = 0.003]. The present findings suggest that youth soccer players slept less than the recommended during the international tournament, and sleep duration was neg-atively associated with training/match load.

History

Volume

18

Issue

4

Start Page

1

End Page

11

Number of Pages

11

eISSN

1660-4601

ISSN

1661-7827

Location

Switzerland

Publisher

MDPI

Publisher License

CC BY

Additional Rights

CC BY 4.0

Language

eng

Peer Reviewed

Yes

Open Access

Yes

Acceptance Date

18/02/2021

External Author Affiliations

Portuguese Football Federation

Author Research Institute

Appleton Institute

Era Eligible

Yes

Medium

Electronic

Journal

International Journal of Environmental Research and Public Health

Article Number

2076