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SLEEP EXTENSION, PERFORMANCE AND HEART AUTONOMIC MODULATION: BRAZILIAN PARALYMPIC ATHLETE, WORLD RECORD HOLDER
In high performance sports, frequent exposure to high intensity training programs and competitions increases the need for recovery and therefore may increase the overall sleep demand and affect physiological adaptations.
Considering the growing body of evidence suggesting that sleep extension may aid improvements in reaction time and overall assessments of physical and mental well-being, the aim of the study was to analyze the effect of sleep extension (25% of total bed time). On performance parameters and cardiac autonomic modulation of the Brazilian swimmer, visually impaired (S13), world record holder and medalist at Parapan-Americans of Lima, in 2019.
Data collection was performed at the Brazilian Paralympic Center. Tha actigraphy (10 days baseline and 7 days extension), was used for sleep analysis, considering total sleep time, latency, efficiency and awake period after sleep onset (WASO). The sleepiness questionnaires (Epworth and Karolinska) and the sleep quality questionnaire (Pittsburgh-PSQI) were applied. Autonomic modulation analysis was performed from the beat-to-beat photoplestimography record and the performance analysis (50 meters at maximum speed) considering the total time at 50m and the reaction time.
The results indicated that the athlete had a positive PSQI score (7) and had a sleep extension of 28% of total bed time. In addition, at sleep extension there was a reduction in sleep latency (12%), WASO (30%) and an increase in sleep efficiency (7.4%). Regarding sleepiness, the scores were lower during the period of sleep extension (Epworth: basal (8); extension (7) and Karolinska: basal (2); extension (1). Considering performance results and modulation variables, in the sleep extension period, there was an increase in RR pulse interval (5.4%), as well as a reduction in sympathetic modulation (LF - 54.4%) and sympathovagal balance (LF / HF). 86.85%). No changes in blood pressure variability and total reaction time were identified.
In this context, the results suggest that sleep extension had positive aspects in sleep and autonomic modulation variables, not indicating changes in time of total reaction.
Sleep Extension. Heart Rate Variability. Athletes. Visual Impairment. Performance.
Relato de Caso
Universidade Estadual de Campinas - Sao Paulo - Brasil
Heloísa Pereira Pancotto Ruy, Catarina de Andrade Barboza, Gabriela Ministro, Samuel Bento da Silva, Marco Túlio de Mello, Andressa Silva de Mello, Fernanda Narciso, Bruno Rodrigues, Milton Shoiti Misuta, Andrea Maculano Esteves