Calorie Restriction Diets on Weight Reduction, Post weigh-in Recovery and Exercise Performance in Athletes

NCT05017259 | Completed

• 1 other identifier: MOST 108-2410-H-028-005
• Study Type: interventional
• Target: 12
• Locations: 1 country
• Sites: 1

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.

Conditions

Diet, Reducing

Outcome Measures

Primary Outcomes (3)

• 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.

  1 min

• 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.

  1 min

• 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.

  1 min

Secondary Outcomes (1)

• Taekwondo-specific reaction time in seconds assessed by Electromyography (EMG) signals

  1 min

Study Arms (2)

low carbohydrate trial

EXPERIMENTAL

The energy distribution was carbohydrate 10%, protein 40-50%, fat 40-50% in the LC trial.

Dietary Supplement: calorie restriction diet

high carbohydrate trial

ACTIVE COMPARATOR

The energy distribution was carbohydrate 60-65%, protein 30-40%, fat 5-10% in the HC trial.

Dietary Supplement: calorie restriction diet

Interventions

calorie restriction diet DIETARY_SUPPLEMENT

The 7-day low-calorie diet contained 15.8 ± 0.4 kcal/kg/d in both trials, divided into three meals a day.

high carbohydrate trial; low carbohydrate trial

Eligibility Criteria

• Age: 20 Years - 24 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Must have at least 6 years of Taekwondo training experience
• Must have participated in domestic or international competitions

You may not qualify if:

• Smoking
• Cardiovascular disease
• Diabetes
• Hypertension
• Any medication in the past 3 months

Sponsors & Collaborators

• Chin Hsu: lead

Study Sites (1)

National Taiwan University of Sport

Taichung, Taiwan

Location

MeSH Terms

Interventions

Caloric Restriction

Intervention Hierarchy (Ancestors)

Diet Therapy; Nutrition Therapy; Therapeutics; Energy Intake; Diet; Nutritional Physiological Phenomena; Diet, Food, and Nutrition; Physiological Phenomena

Study Officials

• Chin Hsu

  Assistant professor

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, CARE PROVIDER
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Assistant professor

Study Record Dates

• First Submitted: August 15, 2021
• First Posted: August 23, 2021
• Study Start: August 17, 2019
• Primary Completion: September 26, 2019
• Study Completion: September 26, 2019
• Last Updated: August 23, 2021

Record last verified: 2021-08

Data Sharing

• IPD Sharing: Will not share

Locations

TW (1)