The effect of late-night sleep deprivation and caffeine supplementation on anaerobic performance in active women.
Design
A quasi-experimental, single-blind, crossover, 14 participants per group, applied trial study
Settings and conduct
Fourteen subjects will consume caffeine supplements and a placebo in a single-blind crossover design. This study will be conducted in the physiology laboratory of Alzahra University, Tehran. Subjects will attend the laboratory in four separate sessions to perform the Wingate test to evaluate anaerobic power. The test sessions are as follows: In the first session, the subjects will appear in the laboratory at 4 PM after a full night's sleep from 11 PM to 8 AM and will perform the Wingate test. In the second session, the subjects will perform the Wingate test after a night of partial sleep deprivation (going to bed at 11 PM and waking up at 4 AM, then not sleeping until the test). In the third and fourth sessions, the subjects will perform the Wingate anaerobic test after a night of partial sleep deprivation and attending the laboratory one hour after consuming a caffeine supplement (6 mg of caffeine per kilogram of body weight) or a placebo (wheat flour).
Participants/Inclusion and exclusion criteria
1- Active women aged 18-28 2- Have a normal body mass index (19-24) 3- Regular menstrual cycle 4- Consume a maximum of 70 mg of caffeine in the daily diet 5- Enjoy a normal night's sleep (sleeping hours range from 11-12 pm to 7-8 am)
Intervention groups
Subjects will be in a group for 4 sessions in a crossover manner, taking caffeine supplements and placebo, in the laboratory to perform the Wingate test to assess lower body anaerobic power.
The effect of partial sleep deprivation and caffeine supplementation on anaerobic performance in active women
Public title
The effect of sleep deprivation and caffeine supplementation on anaerobic performance in active women.
Purpose
Basic scienece
Inclusion/Exclusion criteria
Inclusion criteria:
Young women aged 18 to 28 years old from Tehran with a two-month history of physical activity, not consuming more than 70 milligrams of caffeine in their daily diet, and having a natural 8-hour night sleep.
Exclusion criteria:
Excessive caffeine consumption in the daily diet and irregular sleep.
Age
From 18 years old to 28 years old
Gender
Female
Phase
N/A
Groups that have been masked
Participant
Outcome assessor
Sample size
Target sample size:
14
Randomization (investigator's opinion)
N/A
Randomization description
Blinding (investigator's opinion)
Double blinded
Blinding description
In this study, the participant is blinded; subjects do not know which intervention they receive in each test session. This is to prevent it from affecting their performance during the Wingate test. and the outcome evaluator in the laboratory who collects the data
Placebo
Used
Assignment
Parallel
Other design features
Secondary Ids
empty
Ethics committees
1
Ethics committee
Name of ethics committee
Al-Zahra University Ethics Committee
Street address
Alzahra University, Deh Vanak, Tehran
City
Terhran
Province
Tehran
Postal code
1993891176
Approval date
2024-06-01, 1403/03/12
Ethics committee reference number
IR.ALZAHRA.REC.1403.015
Health conditions studied
1
Description of health condition studied
Sleep deprivation at the end of the night
ICD-10 code
ICD-10 code description
Primary outcomes
1
Description
Anaerobic Performance
Timepoint
In four sessions following three nights of partial sleep deprivation and one night of full sleep
Method of measurement
Wingate Anaerobic Test
Secondary outcomes
empty
Intervention groups
1
Description
Intervention group: After one night of partial sleep deprivation, one hour before performing the Wingate test, the subjects will consume a caffeine supplement at a dose of 6 mg per kg of body weight. The duration of the present protocol is two months, and all tests will be conducted during the second week of the follicular phase of the menstrual cycle.
Category
N/A
Recruitment centers
1
Recruitment center
Name of recruitment center
Al-Zahra University
Full name of responsible person
Leila Ghazaleh
Street address
Sheikh Bahai Square
City
Tehran
Province
Tehran
Postal code
1993893973
Phone
+98 21 8804 4040
Email
L.ghazaleh@alzahra.ac.ir
Sponsors / Funding sources
1
Sponsor
Name of organization / entity
Al-Zahra University
Full name of responsible person
Zahra Jafarzadeh
Street address
Deh Vanak, Alzahra University
City
Tehran
Province
Tehran
Postal code
1993891176
Phone
+98 21 8803 0652
Email
L.ghazaleh@alzahra.ac.ir
Grant name
-
Grant code / Reference number
-
Is the source of funding the same sponsor organization/entity?
Yes
Title of funding source
Al-Zahra University
Proportion provided by this source
1
Public or private sector
Public
Domestic or foreign origin
Domestic
Category of foreign source of funding
empty
Country of origin
Type of organization providing the funding
Academic
Person responsible for general inquiries
Contact
Name of organization / entity
Al-Zahra University
Full name of responsible person
Dr Leila Ghazale
Position
Associate Professor
Latest degree
Ph.D.
Other areas of specialty/work
Biomechanics of the muscle nerve
Street address
Deh Venk Square, Sheikh Bahai Square,
City
Tehran
Province
Tehran
Postal code
1993893973
Phone
+98 21 8804 4040
Email
L.ghazaleh@alzahra.ac.ir
Person responsible for scientific inquiries
Contact
Name of organization / entity
Al-Zahra University
Full name of responsible person
Zahra Vahdipour
Position
Master's student
Latest degree
Bachelor
Other areas of specialty/work
Applied Exercise Physiology
Street address
Sheikh Bahai Square
City
Tehran
Province
Tehran
Postal code
1993893973
Phone
+98 21 8804 4040
Email
zvahidipour@gmail.com
Person responsible for updating data
Contact
Name of organization / entity
Al-Zahra University
Full name of responsible person
Zahra Vahidipour
Position
Master's student
Latest degree
Bachelor
Other areas of specialty/work
Applied Exercise Physiology
Street address
Sheikh Bahai Square
City
Tehran
Province
Tehran
Postal code
1993893973
Phone
+98 21 8804 4040
Email
zvahidipour@gmail.com
Sharing plan
Deidentified Individual Participant Data Set (IPD)
No - There is not a plan to make this available
Justification/reason for indecision/not sharing IPD