Effects of Sleep Restrictions on Maximal Strength, Muscle Power, and Strength Endurance in Resistance-trained Women.
- Conditions
- Sleep RestrictionSleep
- Interventions
- Procedure: Sleep restriction
- Registration Number
- NCT06223776
- Lead Sponsor
- University School of Physical Education, Krakow, Poland
- 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.
Recruitment & Eligibility
- Status
- ENROLLING_BY_INVITATION
- Sex
- Female
- Target Recruitment
- 20
- 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
- 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
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- CROSSOVER
- Arm && Interventions
Group Intervention Description Sleep restriction 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).
- Primary Outcome Measures
Name Time Method Maximal strength bench press test 1 day after night with or without intervention The next day after a) sleep restriction b) normal sleep
Countermovement jump 1 day after night with or without intervention Vertical jump test performed by having an athlete quickly squat to a self-selected depth and then jump as high as possible.
Muscle endurance test in bench press 1 day after night with or without intervention muscle endurance test in the bench press exercise at 50% 1RM
Explosive bench press exercise 1 day after night with or without intervention three sets of three repetitions of explosive bench press exercise at 50% of the load representing one-repetition maximum (1RM)
- Secondary Outcome Measures
Name Time Method Stress and recovery (SRSS) 1 day after night with or without intervention The Short Recovery and Stress Scale (SRSS) measure the recovery-stress state of an athlete multidimensionally with eight items on emotional, mental, physical, and overall levels. In the morning, each experimental day and the day after.
Motivation 1 day after night with or without intervention During each experimental session. Before sports performance protocol.
Mood (POMS) 1 day after night with or without intervention The POMS is a widely-applied measure for the assessment of an individual's mood. During each experimental session. Before sports performance protocol.
Readiness-to-train questionnaire (RTT-Q) 1 day after night with or without intervention Subjective reactions related to the level of motivation for effort. In the morning, each experimental day and the day after.
Pain (Pain scale) 1 day after night with or without intervention A pain scale is a tool use to help assess a person's pain. Scale 0-10 (0- lack of pain; 10 - maximal pain). Immediately after the last performance exercise in experimental sessions.
Rating perceived exertion (RPE) 1 day after night with or without intervention A subjective scale that assesses the severity of effort exerted. Includes a rating from 6 perceiving "no effort" to 20 perceiving "maximum effort." Immediately after the last performance exercise in experimental sessions.
Trial Locations
- Locations (1)
University School of Physical Education in Cracow
🇵🇱Kraków, Poland