Clinical trial NCT06223776: Effects of Sleep Restrictions on Maximal Strength, Muscle Power, and Strength Endurance in Resistance-trained Women.
Official title: Effects of One Night's Acute Sleep Restrictions on Maximal Strength, Muscle Power, and Strength Endurance in Resistance-trained Women.
Study type: INTERVENTIONAL
Overall status: ENROLLING_BY_INVITATION
Phase: NA
Conditions: Sleep Restriction
Sleep
Keywords: acute sleep restriction
early sleep restriction
Lead sponsor: University School of Physical Education, Krakow, Poland
Sponsor class: OTHER
First posted: 2024-01-25
Enrollment: 20
Sex: FEMALE
Minimum age (years): 18
Maximum age (years): 30
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: DIAGNOSTIC

Brief summary: The study aims to see how acute sleep restriction will affect women resistance trainers. Above all, the investigators will be interested in observing the relationship between shorter sleep and athletic performance, as well as other important aspects, such as their level of motivation to exercise, how much pain participants felt during exercise and how demanding they found exercise. The investigators assume that differences in subjective measures (such as pain levels, motivation and mood) will be most apparent.

Detailed description: Participants would take part in two identical experimental sessions under two sleep conditions:

with sleep restrictions (SR), where will experience acute sleep restriction the night before the test session (i.e., 3 h of early sleep restriction versus normal sleep); with the control condition (CON), where participants will follow their habitual sleep-wake routines.

Every session would separated by a 1-week interval. The average sleep duration (CON) is going to be estimated by using actigraphy Motionwatch 8 for 5 days (from Monday to Friday).

Female athletes will receive accelerometers one day before experimental sessions. Participants will be asked to wear them on their non-dominant wrists from 8 p.m. to the next morning (experimental sessions day).

The participants would complete the morning session with a battery of physical tests, measuring several components of specific physical performance capacity and cognitive function.

During the experimental sessions, participants would be at the luteal or follicular phases excluding the period of bleeding (4-5 days) and the time immediately before planned bleeding (3 days before), because this can have a bad influence on sleep.

Eligibility criteria: Inclusion Criteria:

* a minimum of 3 years of training experience;
* practicing physical activity for the last 6 months at least 3 times per week for 2h
* current medical qualification for competitive sport

Exclusion Criteria:

* diseases that can have a bad influence on the menstrual cycle (e.g. polycystic ovarian syndrome, endometriosis);
* 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

Primary outcomes:
measure: Maximal strength bench press test
timeFrame: 1 day after night with or without intervention
measure: Muscle endurance test in bench press
timeFrame: 1 day after night with or without intervention
measure: Explosive bench press exercise
timeFrame: 1 day after night with or without intervention
measure: Countermovement jump
timeFrame: 1 day after night with or without intervention
Secondary outcomes:
measure: Mood (POMS)
timeFrame: 1 day after night with or without intervention
measure: Pain (Pain scale)
timeFrame: 1 day after night with or without intervention
measure: Motivation
timeFrame: 1 day after night with or without intervention
measure: Rating perceived exertion (RPE)
timeFrame: 1 day after night with or without intervention
measure: Stress and recovery (SRSS)
timeFrame: 1 day after night with or without intervention
measure: Readiness-to-train questionnaire (RTT-Q)
timeFrame: 1 day after night with or without intervention
Other outcomes:
measure: Objective Sleep - Total sleep time
timeFrame: 1 day after night with or without intervention
measure: Objective Sleep - Sleep efficiency
timeFrame: 1 day after night with or without intervention.
measure: Objective Sleep - WASO (Wake After Sleep Onset)
timeFrame: 1 day after night with or without intervention.
measure: Objective Sleep - Sleep duration
timeFrame: 1 day after night with or without intervention.
measure: Objective Sleep - Sleep onset time
timeFrame: 1 day after night with or without intervention.
measure: Objective Sleep - Wake time
timeFrame: 1 day after night with or without intervention.
measure: Blood collection - progesterone
timeFrame: 1 day after night with or without intervention.
measure: Blood collection - estradiol
timeFrame: 1 day after night with or without intervention.
Locations:
city: Kraków
country: Poland
facility: University School of Physical Education in Cracow
Study officials:
References: