This study will observe the participants fasting during the month ramadan. Descriptive characteristics and assessments of sleep, food consumption, body composition, cognitive skills, anticipation time, and physical activity will be conducted before, during and after ramadan.
The aim of this is investigating the changes in sleep patterns, dietary intake, cognitive skills, anticipation time and physical activity levels during Ramadan in healthy young women. After giving information about the research, participants' descriptive characteristics such as age, height, body weight, body fat percentage, and chronotype (Morningness-Eveningness Questionnaire) will be determined and recorded. Participants' sleep patterns (Actigraphy and Pittsburgh Sleep Quality Index), food consumption (BEBIS), cognitive skills (Stroop test, Letter digit test), anticipation time (Bassin Anticipation Timer), and physical activity levels (International Physical Activity Questionnaire) will be assessed before Ramadan (Pre-R), in the first week of Ramadan (FW-R), in the last week of Ramadan (LW-R) and after Ramadan (Post-R). Additionally, body composition measurements will be taken in Pre-R, LW-R and Post-R. The completion of questionnaires and scales will be conducted individually in a quiet environment. Sleep records will be obtained using an actigraphy device in the participants' own sleep environments. Other measurements will be conducted at the University Performance and Exercise Physiology Laboratory under controlled temperature (22-24°C) and humidity (50-60%).
Study Type
OBSERVATIONAL
Enrollment
22
Intermittent fasting during the month Ramadan
Bolu Abant İzzet Baysal University, Faculty of Sport Sciences,
Bolu, Turkey (Türkiye)
Actigraphy
Actigraphy is a less invasive method compared to other sleep measurement methods such as polysomnography
Time frame: Pre-test, following one week first mid-test, following three weeks second mid-test and following two weeks post-test
Body weight measurement
Test that involves measuring body weight using medical scales
Time frame: Pre-test, following one month mid-test and following another one month post-test
Body fat percentage
Includes determination of body fat percentage using a bioelectrical impedance analyzer
Time frame: Pre-test, following one month mid-test and following another one month post-test
Food consumption assessment
Participants will be asked to record their food and liquid intake in detail for three consecutive days (two weekdays and one weekend day). All data will then be entered into the nutrition data system, and total energy intake, carbohydrate amount (CHO), protein, fat, and liquid consumption will be calculated.
Time frame: Pre-test, following one week first mid-test, following three weeks second mid-test and following two weeks post-test
Stroop test
The Stroop test reflects mainly the frontal lobe activity. The Stroop effect demonstrates an individual's ability to shift perceptual setup according to changing demands, suppress habitual response patterns, and perform unconventional actions, which are primarily related to frontal lobe activity. The test also measures information processing speed.
Time frame: Pre-test, following one week first mid-test, following three weeks second mid-test and following two weeks post-test
Letter Digit Substitution Test
The Letter Digit Substitution Test is an adapted matching test developed to measure information processing speed. The test contains a key containing nine letters of the alphabet and the numbers 1 to 9. Then there are randomly arranged letters and participants will be asked to match the random letters with the appropriate number indicated by the key.
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Time frame: Pre-test, following one week first mid-test, following three weeks second mid-test and following two weeks post-test
Anticipation time measurement
The anticipation time will be measured using the 50575 model of the Bassin Anticipation Timer. The sensitivity of the device will be set to 0.001 seconds, with the anticipation device's speed set to 11 mph (4.9 m/s) and the delay time set to 0-2 seconds. Each participant will undergo 20 measurements per session. Measurements will be manually recorded on the anticipation time measurement sheet. The test position for all participants will be standing vertically in front of the anticipation device, with the motion light approaching them. The participant will stand at the end of the device, using their dominant hand to press the stop button at sternum height with one hand. The researcher will hide the start command button behind them to ensure participants cannot see when the test begins. After each trial is recorded, the next trial will be conducted. The fixed anticipation time error (SzSh) and absolute anticipation time error (SzMh) will be automatically calculated.
Time frame: Pre-test, following one week first mid-test, following three weeks second mid-test and following two weeks post-test
Physical activity level assessment
The International Physical Activity Questionnaire (IPAQ) will be used to determine their level of physical activity levels. The questionnaire consists of sections that inquire about vigorous physical activity, moderate physical activity, and walking activities of at least 10 minutes duration over the past seven days.
Time frame: Pre-test, following one week first mid-test, following three weeks second mid-test and following two weeks post-test
Pittsburgh Sleep Quality Index (PSQI)
Pittsburgh Sleep Quality Index assesses various sleep-related factors, including sleep latency, sleep duration, sleep efficiency, and daytime sleepiness. It is a 19-item self-report questionnaire. Each item is scored from 0 to 3, and the total score ranges from 0 to 57. Higher scores indicate poorer sleep quality.
Time frame: Pre-test, following one month mid-test and following another one month post-test
Chronotype assessment
Morningness-Eveningness Questionnaire (MEQ) will be used to assess Chronotype. The form consists of 19 questions, each offering four possible answers. Participants receive different scores based on their responses: questions 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, and 16 are scored between 1 and 4, questions 1, 2, 10, 17, and 18 are scored between 1 and 5, questions 11 and 19 are scored between 0 and 6, and question 12 is scored between 0 and 5. The scores range from 16 to 86, with lower scores indicating evening types and higher scores indicating morning types. Based on the total score, individuals are classified as evening types (16-41 points), intermediate types (42-58 points), and morning types (59-86 points).
Time frame: Only once in the pre-test