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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.
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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Normal sleep | No Intervention | The night before the experimental session, where participants will follow their habitual sleep-wake routines. | |
| Sleep restriction | Experimental | 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). |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Sleep restriction | Procedure | Participants will experience a night of acute sleep restriction. During this night, they will sleep 3 hours less than usual. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Maximal strength bench press test | The next day after a) sleep restriction b) normal sleep | 1 day after night with or without intervention |
| Muscle endurance test in bench press | muscle endurance test in the bench press exercise at 50% 1RM | 1 day after night with or without intervention |
| Explosive bench press exercise | three sets of three repetitions of explosive bench press exercise at 50% of the load representing one-repetition maximum (1RM) | 1 day after night with or without intervention |
| Countermovement jump | Vertical jump test performed by having an athlete quickly squat to a self-selected depth and then jump as high as possible. | 1 day after night with or without intervention |
| Measure | Description | Time Frame |
|---|---|---|
| Mood (POMS) | The POMS is a widely-applied measure for the assessment of an individual's mood. During each experimental session. Before sports performance protocol. | 1 day after night with or without intervention |
| Pain (Pain scale) |
| Measure | Description | Time Frame |
|---|---|---|
| Objective Sleep - Total sleep time | Total sleep time obtained from sleep onset to time at wake-up assessed by actigraphy. The night before and after the experimental sessions. | 1 day after night with or without intervention |
| Objective Sleep - Sleep efficiency |
Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University School of Physical Education in Cracow | Krakow | 31-571 | Poland |
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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.
| 1 day after night with or without intervention |
| Motivation | During each experimental session. Before sports performance protocol. | 1 day after night with or without intervention |
| Rating perceived exertion (RPE) | 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. | 1 day after night with or without intervention |
| Stress and recovery (SRSS) | 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. | 1 day after night with or without intervention |
| Readiness-to-train questionnaire (RTT-Q) | Subjective reactions related to the level of motivation for effort. In the morning, each experimental day and the day after. | 1 day after night with or without intervention |
The percentage of total sleep time to lights off and leaving bed assessed by actigraphy. The night before and after the experimental sessions. |
| 1 day after night with or without intervention. |
| Objective Sleep - WASO (Wake After Sleep Onset) | The total number of minutes that a person is awake after having initially fallen asleep assessed by actigraphy. The night before and after the experimental sessions. | 1 day after night with or without intervention. |
| Objective Sleep - Sleep duration | The quantity of time that a person sleeps assessed by actigraphy. The night before and after the experimental sessions. | 1 day after night with or without intervention. |
| Objective Sleep - Sleep onset time | The time it takes a person to fall asleep after turning the lights out assessed by actigraphy. The night before and after the experimental sessions. | 1 day after night with or without intervention. |
| Objective Sleep - Wake time | The hours in the day that a person is awake assessed by actigraphy. The night before and after the experimental sessions. | 1 day after night with or without intervention. |
| Blood collection - progesterone | Blood will be drawn to measure progesterone. Before each experimental sesion | 1 day after night with or without intervention. |
| Blood collection - estradiol | Blood will be drawn to measure estradiol. Before each experimental sesion | 1 day after night with or without intervention. |