Effects of Sleep Restrictions on Maximal Strength, Muscle Power, and Strength Endurance in Resistance-trained Women.

Sleep Clinical Trial

Official title:

Effects of One Night's Acute Sleep Restrictions on Maximal Strength, Muscle Power, and Strength Endurance in Resistance-trained Women.

Clinical Trial Details — Status: Enrolling by invitation

Administrative data

• NCT number: NCT06223776
• Other study ID #: 160/MN/INoS/2023
• Status: Enrolling by invitation
• Phase: N/A
• Start date: May 15, 2023
• Est. completion date: August 1, 2024

Study information

• Verified date: April 2024
• Source: University School of Physical Education, Krakow, Poland
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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.

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 information / eligibility

• Status: Enrolling by invitation
• Enrollment: 20
• Est. completion date: August 1, 2024
• Est. primary completion date: August 1, 2024
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 18 Years to 30 Years

Eligibility

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

Related Conditions & MeSH terms

• Sleep
• Sleep Restriction

Intervention

Procedure:
• Sleep restriction
Participants will experience a night of acute sleep restriction. During this night, they will sleep 3 hours less than usual.

Locations

Country	Name	City	State
Poland	University School of Physical Education in Cracow	Kraków

Sponsors (1)

Lead Sponsor	Collaborator
University School of Physical Education, Krakow, Poland

Country where clinical trial is conducted

Poland, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	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
Other	Objective Sleep - Sleep efficiency	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.
Other	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.
Other	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.
Other	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.
Other	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.
Other	Blood collection - progesterone	Blood will be drawn to measure progesterone. Before each experimental sesion	1 day after night with or without intervention.
Other	Blood collection - estradiol	Blood will be drawn to measure estradiol. Before each experimental sesion	1 day after night with or without intervention.
Primary	Maximal strength bench press test	The next day after a) sleep restriction b) normal sleep	1 day after night with or without intervention
Primary	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
Primary	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
Primary	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
Secondary	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
Secondary	Pain (Pain scale)	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
Secondary	Motivation	During each experimental session. Before sports performance protocol.	1 day after night with or without intervention
Secondary	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
Secondary	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
Secondary	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