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

University School of Physical Education, Krakow, Poland

Status: Invitation-only

Conditions: Sleep Restriction; Sleep

Treatments: Procedure: Sleep restriction

Study type: Interventional

Funder types: Other

Identifiers

NCT06223776

160/MN/INoS/2023

Details and patient eligibility

About

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.

Full 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.

Enrollment: 20 estimated patients

Sex: Female

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Diagnostic

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Single Blind

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20 participants in 2 patient groups

Normal sleep

No Intervention group

Description:

The night before the experimental session, where participants will follow their habitual sleep-wake routines.

Sleep restriction

Experimental group

Description:

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).

Treatment:

Procedure: Sleep restriction