Effects of Bodyweight High-intensity Exercise at Different Times of Day on 72-hour Eating Behaviours and Physical Activity in Physically Inactive Adults
Trial Snapshot
- Phase
- Not Applicable
- Status
- Recruiting
- Enrollment
- 20
- Locations
- 1
- Primary Endpoint
- Physical activity
Study Overview
Brief Summary
The purpose of this project is to investigate the effects of exercise at different times of day on 72-hour eating behaviour, physical activity and sedentary behaviour in physically inactive adults.
Detailed Description
Eligibility and Consent Confirmation:
Prior to the one-week preliminary test, participants will undergo eligibility screening, including measurements of height, weight, and body composition. After the researchers will provide a detailed explanation of the experimental procedures, participants can decide whether to participate in the study. Eligible participants will complete a set of high-intensity bodyweight exercise to familiarize themselves with the exercise. Subsequently, the researchers will explain the use of pedometers and distributed dietary record forms.
During a one-week preliminary test, participants will be instructed to record their physical activity levels measured in steps, sleep duration including wake-up and sleep times, and dietary behaviours through photographs taken (2 weekdays and 1 weekend day) over a period of 7 consecutive days. Participants will be allowed to take part in this study, once they meet the inclusion criteria: 1) an average daily step count of less than 7,500 over the course of the week and 2) a wake-up time no later than 11:00 AM).
Exercise intervention:
Two main trials will be separated by at least one week - exercise in the morning (08:00 to 11:00 AM) or exercise in the evening (18:00 to 21:00 PM).
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Crossover
- Primary Purpose
- Basic Science
- Masking
- None
Eligibility Criteria
- Ages
- 20 Years to 50 Years (Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Aged between 20 and 50 years, with a BMI ranging from 19 to 27 kg/m².
- •Classified as having "low" physical activity levels (750 Metabolic Equivalents / week) according to the International Physical Activity Questionnaire (IPAQ).
- •Engaged in moderate-intensity exercise for no more than 3 days per week and less than 30 minutes per session in the 3 months preceding the study.
- •Maintained a stable body weight (± 3 kg) during the 3 months prior to the main experiment.
- •Not taking any medications, supplements, or vitamins that might affect food intake, appetite, physical activity, weight loss, or metabolism.
- •Free from cardiovascular and metabolic diseases.
- •Not pregnant or planning to become pregnant.
- •Not currently on a diet or undergoing any specific dietary interventions (e.g., intermittent fasting, ketogenic diet).
- •No injuries or surgical wounds preventing physical activity.
- •Regular sleep patterns, averaging 7-9 hours per night, with no shift work.
- •No habits of heavy alcohol consumption or smoking.
Exclusion Criteria
- •Personal history of/existing diabetes, cardiovascular disease, metabolic disease or dyslipidaemia.
- •Taking medications that may influence lipid or carbohydrate metabolism or immune system function.
- •Unable to take part in exercise for any reason (e.g., injury or disability) or a positive response to any questions on the Physical Activity Readiness questionnaire (PAR-Q).
Arms & Interventions
Morning exercise
Participants performed bodyweight exercise in the morning between 08:00 to 11:00 AM.
Intervention: Morning exercise (Behavioral)
Evening exercise
Participants performed bodyweight exercise in the morning between 18:00 to 21:00 PM.
Intervention: Evening exercise (Behavioral)
Outcomes
Primary Outcomes
Physical activity
Time Frame: 72 hours (24 hours before exercise day, exercise day and 24 hours after exercise day)
Changes in physical activity intensity (minutes and percentage during 72 hours) and levels (minutes and percentage during 72 hours) between trials
Energy intake
Time Frame: 72 hours (24 hours before exercise day, 24 hours during exercise day and 24 hours after exercise day)
Changes in total and macronutrient energy intake between trials
Sedentary behaviour
Time Frame: 72 hours (24 hours before exercise day, exercise day and 24 hours after exercise day)
Changes in sedentary behaviour (minutes and percentage during 72 hours) between trials
Secondary Outcomes
- Heart Rate(During 45 minutes exercise)
- Rating of Perceived Exertion (RPE)(During 45 minutes exercise)
- Visual analogue scale (VAS)(Baseline upon wake up, 15 minutes before exercise and 15 minutes after exercise)
Investigators
Yung-Chih Chen
Principal Investigator
National Taiwan Normal University