Back to resultsCalorie Restriction Diets on Weight Reduction, Post weigh-in Recovery and Exercise Performance in Athletes
Primary Purpose
Diet, Reducing
Status
Completed
Phase
Not Applicable
Locations
Taiwan
Study Type
Interventional
Intervention
calorie restriction diet
Sponsored by
About this trial
This is an interventional treatment trial for Diet, Reducing
Eligibility Criteria
Inclusion Criteria:
- Must have at least 6 years of Taekwondo training experience
- Must have participated in domestic or international competitions
Exclusion Criteria:
- Smoking
- Cardiovascular disease
- Diabetes
- Hypertension
- Any medication in the past 3 months
Sites / Locations
- National Taiwan University of Sport
Arms of the Study
Arm 1
Arm 2
Arm Type
Experimental
Active Comparator
Arm Label
low carbohydrate trial
high carbohydrate trial
Arm Description
The energy distribution was carbohydrate 10%, protein 40-50%, fat 40-50% in the LC trial.
The energy distribution was carbohydrate 60-65%, protein 30-40%, fat 5-10% in the HC trial.
Outcomes
Primary Outcome Measures
Body weight in kilograms assessed by air-displacement plethysmography (Bod Pod)
The body weight (kg) of participants was determined before and after calorie restriction intervention to evaluate the degree of weight loss.
Body fat mass in kilograms assessed by air-displacement plethysmography (Bod Pod)
The body fat mass (kg) of participants was determined before and after calorie restriction intervention to evaluate the degree of weight loss.
Lean body mass in kilograms assessed by air-displacement plethysmography (Bod Pod)
The lean body fat mass (kg) of participants was determined before and after calorie restriction intervention to evaluate the degree of weight loss.
Secondary Outcome Measures
Taekwondo-specific reaction time in seconds assessed by Electromyography (EMG) signals
The reaction time (sec) was measured before and after weight loss to assess the difference in exercise performance. The participants were asked to make the fist on the left hand as soon as they see a light signal, then start the taekwondo-specific movement. The reaction time was calculated as the time from the beginning of the light signal to the start of electromyography (EMG) signal of the left thenar muscles. The movement was performed 5 times. The average reaction time was used to arrive at one reported value.
Full Information
1. Study Identification
Unique Protocol Identification Number
NCT05017259
Brief Title
Calorie Restriction Diets on Weight Reduction, Post weigh-in Recovery and Exercise Performance in Athletes
Official Title
The Metabolomic Exploration of Low-carbohydrate and Calorie Restriction Diet on Weight Reduction, Post weigh-in Recovery and Exercise Performance in Taekwondo Athletes
Study Type
Interventional
2. Study Status
Record Verification Date
August 2021
Overall Recruitment Status
Completed
Study Start Date
August 17, 2019 (Actual)
Primary Completion Date
September 26, 2019 (Actual)
Study Completion Date
September 26, 2019 (Actual)
3. Sponsor/Collaborators
Responsible Party, by Official Title
Sponsor-Investigator
Name of the Sponsor
Chin Hsu
4. Oversight
Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
No
5. Study Description
Brief Summary
Low-carbohydrate diets are often used as weight-loss strategies by obese individuals and athletes. This diet has effects on oxidizing fat and suppressing appetite. But short term evidences are still few. In combat sports such as taekwondo, athletes prefer rapid weight loss to achieve a desired weight category. The purpose of this study was to investigate the impact of the low carbohydrate diet combined with strict calorie restriction on body composition and exercise performance in taekwondo athletes.
Detailed Description
This study used a randomized cross-over design. Each participant completed a low carbohydrate and a high carbohydrate trial in a random order, separated by a 30-day wash-out period. Each trial comprised of a 7-day weight loss period, followed by an 18-hr recovery period. The purpose of this study was to investigate the effect of 7-day caloric restriction with low- or high-carbohydrate diet, combined with an 18-hr recovery period, on body weight loss and taekwondo-specific performance.
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Diet, Reducing
7. Study Design
Primary Purpose
Treatment
Study Phase
Not Applicable
Interventional Study Model
Crossover Assignment
Masking
ParticipantCare Provider
Allocation
Randomized
Enrollment
12 (Actual)
8. Arms, Groups, and Interventions
Arm Title
low carbohydrate trial
Arm Type
Experimental
Arm Description
The energy distribution was carbohydrate 10%, protein 40-50%, fat 40-50% in the LC trial.
Arm Title
high carbohydrate trial
Arm Type
Active Comparator
Arm Description
The energy distribution was carbohydrate 60-65%, protein 30-40%, fat 5-10% in the HC trial.
Intervention Type
Dietary Supplement
Intervention Name(s)
calorie restriction diet
Intervention Description
The 7-day low-calorie diet contained 15.8 ± 0.4 kcal/kg/d in both trials, divided into three meals a day.
Primary Outcome Measure Information:
Title
Body weight in kilograms assessed by air-displacement plethysmography (Bod Pod)
Description
The body weight (kg) of participants was determined before and after calorie restriction intervention to evaluate the degree of weight loss.
Time Frame
1 min
Title
Body fat mass in kilograms assessed by air-displacement plethysmography (Bod Pod)
Description
The body fat mass (kg) of participants was determined before and after calorie restriction intervention to evaluate the degree of weight loss.
Time Frame
1 min
Title
Lean body mass in kilograms assessed by air-displacement plethysmography (Bod Pod)
Description
The lean body fat mass (kg) of participants was determined before and after calorie restriction intervention to evaluate the degree of weight loss.
Time Frame
1 min
Secondary Outcome Measure Information:
Title
Taekwondo-specific reaction time in seconds assessed by Electromyography (EMG) signals
Description
The reaction time (sec) was measured before and after weight loss to assess the difference in exercise performance. The participants were asked to make the fist on the left hand as soon as they see a light signal, then start the taekwondo-specific movement. The reaction time was calculated as the time from the beginning of the light signal to the start of electromyography (EMG) signal of the left thenar muscles. The movement was performed 5 times. The average reaction time was used to arrive at one reported value.
Time Frame
1 min
10. Eligibility
Sex
Male
Minimum Age & Unit of Time
20 Years
Maximum Age & Unit of Time
24 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria:
Must have at least 6 years of Taekwondo training experience
Must have participated in domestic or international competitions
Exclusion Criteria:
Smoking
Cardiovascular disease
Diabetes
Hypertension
Any medication in the past 3 months
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Chin Hsu
Organizational Affiliation
Assistant professor
Official's Role
Principal Investigator
Facility Information:
Facility Name
National Taiwan University of Sport
City
Taichung
Country
Taiwan
12. IPD Sharing Statement
Plan to Share IPD
No
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Calorie Restriction Diets on Weight Reduction, Post weigh-in Recovery and Exercise Performance in Athletes
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