Effects of Sleep Restriction on Female Soccer Players: Physical Performance, Muscle Damage, Inflammation, and BDNF Levels.
NCT ID: NCT06251362
Last Updated: 2024-04-11
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
NA
20 participants
INTERVENTIONAL
2023-11-25
2024-06-30
Brief Summary
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The study involves two sessions: normal sleep (based on habitual duration) and restricted sleep (reduced by 3 hours). Athletes will engage in a simulated match-play game before both sessions, followed by comprehensive performance tests the next day. Blood samples will be collected at three intervals to analyze hormonal profiles (including progesterone, and estradiol), markers of muscle damage, inflammation, stress (such as TNF-α, IL-6, CRP, myoglobin, cortisol, testosterone), and brain-derived neurotrophic factor (BDNF).
On Day 1, pre- and post-training blood samples will be obtained, and participants will wear an actigraph, adhere to specified bedtime routines, and report activities (restricted sleep group). Day 2 involves completing a sleep diary, refraining from caffeine, responding to questionnaires assessing readiness to train and mood, and undergoing performance tests followed by self-reporting of pain levels and perceived exertion using established scales (VAS, RPE 6-20).
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Detailed Description
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The project involves two experimental sessions (each spanning two days) under two different conditions: a) normal sleep (NS; habitual sleep duration determined from the analysis of five consecutive nights) and b) restricted sleep (RS; sleep reduced by 3 hours during the nocturnal period compared to NS). Participants will perform a simulation match-play game (SAFT90) before NS and RS, followed by performance tests on the following day. Blood samples will be collected at three-time points: a) pre-training, b) post-training, and c) before morning tests on the second day of the experiment. Biochemical analysis of the blood will include progesterone and estradiol (for menstrual cycle analysis) as well as parameters related to muscle damage, inflammatory state, and stress levels (TNF-α; IL-6; CRP; myoglobin; hematology; cortisol; testosterone). Additionally, the level of brain-derived neurotrophic factor (BDNF) will be analyzed.
Day 1 of the experiment: Immediately before training, the first blood collection (8 ml) will occur to analyze the necessary blood biochemical parameters. Subsequently, athletes will undergo a standardized afternoon training session, including a simulation match-play game (SAFT90). Another blood sample will be taken immediately after the exercise. Participants will be asked to wear an actigraph on their non-dominant wrist and consume dinner according to the provided recommendations. They will be instructed to go to bed according to a specified schedule (NS or RS). Additionally, participants will be instructed to spend the time before bedtime engaged in routine evening activities (excluding stimulants like coffee or additional exercise). Participants with restricted sleep will also be requested to report their activities every 30 minutes until they go to bed using an internet communicator.
Day 2 of the experiment: Participants will complete the Karolinska Sleep Diary upon waking up. They will also be asked to abstain from consuming caffeine-containing foods and to have breakfast following the provided recommendations. Before the session begins, participants will complete a readiness to train questionnaire (RTQ) and a mood assessment questionnaire (POMS). Blood samples will be collected, followed by specific football-related performance tests: a) repeated high-intensity effort capacity (Yo-Yo test); b) lower limb power (vertical jump); c) maximal acceleration (3x30 m sprints); d) agility with and without the ball (Zig-Zag Test). Immediately after the performance tests, participants will indicate their pain level (Visual Analogue Scale; VAS) and rate their perceived exertion (RPE 6-20).
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
DIAGNOSTIC
DOUBLE
Study Groups
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Normal sleep
The night before the experimental session, where participants will follow their habitual sleep-wake routines.
No interventions assigned to this group
Sleep restriction
The night before the experimental session (with sleep restrictions (SR)), where participants will experience acute sleep restriction the night before the test session (i.e., 3 h of early sleep restriction versus normal sleep).
Sleep restriction
Participants will experience a night of acute sleep restriction. During this night, they will sleep 3 hours less than usual.
Interventions
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Sleep restriction
Participants will experience a night of acute sleep restriction. During this night, they will sleep 3 hours less than usual.
Eligibility Criteria
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Inclusion Criteria
* practicing physical activity for the last 6 months at least 3 times per week for 2h
* current medical qualification for competitive sport
Exclusion Criteria
* using hormonal contraception;
* regularity of the menstrual cycle.
* diagnosed cardiovascular, metabolic, gastrointestinal, or neurological diseases; movement, neuromuscular or musculoskeletal disorders;
* taking medications and supplements that may affect fitness test results; taking supplements that may affect biochemical test results
* sleep disorders (PSQI \>5)
16 Years
30 Years
FEMALE
Yes
Sponsors
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Jagiellonian University
OTHER
University School of Physical Education, Krakow, Poland
OTHER
Responsible Party
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Locations
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The Academy of Physical Education in Krakow
Krakow, , Poland
University School of Physical Education in Cracow
Krakow, , Poland
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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SKN/SP/570683/2023
Identifier Type: -
Identifier Source: org_study_id
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