Banca de QUALIFICAÇÃO: AYRTON BRUNO DE MORAIS FERREIRA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : AYRTON BRUNO DE MORAIS FERREIRA
DATE: 26/03/2026
TIME: 14:00
LOCAL: Via Google Meet
TITLE:

IMPACT OF SLEEP RESTRICTION AND INTENSIFIED TRAINING ON MUCOSAL IMMUNITY AND PSYCHOLOGICAL RESPONSES IN YOUNG SOCCER PLAYERS

KEY WORDS:

Monitoring; Physical education and training; Actigraphy; Adolescent; Recovery after exercise.

PAGES: 60
BIG AREA: Ciências da Saúde
AREA: Educação Física
SUMMARY:

Insufficient sleep is prevalent in sports and can compromise recovery, with hormonal and immunological repercussions. However, the literature still focuses on acute protocols and presents heterogeneous results. This thesis aimed to: (1) synthesize evidence on the effects of insufficient sleep on athletes' biomarkers; (2) analyze, in young soccer players, the impact of intensified training combined with sleep restriction on mucosal immunity, respiratory health, perceived recovery, stress tolerance, and mood; and (3) investigate whether daytime napping attenuates these effects. Study 1 (scoping review) included 11 articles, revealing that total sleep deprivation consistently alters cortisol, while partial restriction shows variable responses and gaps in immunological markers. Studies 2 and 3 were longitudinal field investigations (seven weeks), with repeated measures in young soccer athletes, encompassing weeks of habitual, intensified, and regenerative load. In Study 2, salivary IgA concentrations decreased significantly in both weeks of intensified training (week 3: β = -87.41, p = 0.007; week 5: β = -114.04, p < 0.001). However, only in week 5, where there was partial sleep restriction, was this reduction accompanied by increased severity of upper respiratory tract symptoms (β = 18.75; p = 0.001), increased fatigue (χ²(6) = 42.499, p < 0.001), reduced vigor (χ²(6) = 49.422, p < 0.001), impaired perceived recovery (Δ = -1.19; p < 0.001), and lower stress tolerance (p = 0.001). Study 3 demonstrated that daytime napping mitigated these negative responses. Taken together, the findings reinforce the importance of integrated monitoring of sleep and internal load, and indicate that practical sleep management strategies, such as daytime naps, can contribute to protecting the health and recovery of athletes during periods of intensified training load.

COMMITTEE MEMBERS:
Presidente - 1793257 - ARNALDO LUIS MORTATTI
Interno - 3138718 - RICARDO SANTOS OLIVEIRA
Externo à Instituição - ALEXANDRE MOREIRA - USP
Externo à Instituição - BRUNO TEIXEIRA BARBOSA - UFPB
Externa à Instituição - HANNA KAREN MOREIRA ANTUNES - UNIFESP