Pre Competition Weight Loss of Athletes

NCT06543017 | Completed DMC

• 1 other identifier: SSC2024
• Study Type: interventional
• Target: 16
• Locations: 1 country
• Sites: 1

Brief Summary

The objective of this observational study is to assess the long-term impact of a combined slow and rapid weight reduction strategy on the physiological performance, mental state, and sleep quality of male freestyle wrestlers. The primary question it seeks to address is: Does the combined weight reduction approach affect the physiological performance, mental state, and sleep quality of male freestyle wrestlers during the pre-competition period? Participants will undergo tests at three stages of their weight reduction process (T1, T2, T3) over a period of 38 days prior to the competition, providing data on various physiological and psychological indicators.

Conditions

Body Weight Changes

Keywords

wrestling; weight reduction; physiological performance; mental state; sleep quality

Outcome Measures

Primary Outcomes (11)

• Blood Pressure Testing

  Participants' blood pressure were measured in a supine position using an instrument (manufactured in Shenzhen, China, model: CK-W355) by laboratory personnel, with the average of three readings taken.

  38 days

• Serum testosterone

  Approximately 3 mL of antecubital venous blood was collected from participants and tested for serum testosterone.

  38 days

• Serum creatine kinase

  Approximately 3 mL of antecubital venous blood was collected from participants and tested for serum creatine kinase.

  38 days

• Serum blood urea

  Approximately 3 mL of antecubital venous blood was collected from participants and tested for serum blood urea.

  38 days

• Serum immunoglobulin G

  Approximately 3 mL of antecubital venous blood was collected from participants and tested for serum immunoglobulin G.

  38 days

• Serum immunoglobulin A

  Approximately 3 mL of antecubital venous blood was collected from participants and tested for serum immunoglobulin A.

  38 days

• Serum immunoglobulin M

  Approximately 3 mL of antecubital venous blood was collected from participants and tested for serum immunoglobulin M.

  38 days

• Body Composition Testing

  The participants' weight and body fat percentage were tested using the Korean INBODY 3.0.

  38 days

• The Profile of Mood States

  For psychological state: the Profile of Mood States, a tool for studying mood states and their relation to exercise performance, was used. Participants answered 40 questions with a five-point scale (0 to 4 points, with 0 indicating 'almost none', 1 'a little', 2 'moderate', 3 'quite a bit', and 4 'extremely'), including seven mood dimensions: tension, anger, fatigue, depression, energy, confusion, and self-esteem. Energy and self-esteem are positive mood dimensions, with higher scores indicating better mood states, while the other five are negative mood dimensions, with higher scores indicating worse mood states. The total score, total mood disturbance (calculated as the sum of the five negative mood scores minus the sum of the two positive mood scores plus 100), indicates worse mood states with higher scores. The scale has a reliability between 0.60 and 0.82 and a validity greater than 0.90 for Chinese individuals.

  38 days

• Sleep quality

  The pittsburgh sleep quality index, a questionnaire for assessing sleep quality over the past month, consists of 18 self-rated items forming seven components, with a total score ranging from 0 to 21, where higher scores indicate worse sleep quality. The scale has a reliability between 0.65 and 0.84 and a validity greater than 0.85 for Chinese individuals.

  38 days

• Anaerobic Power Testing

  The Wingate 30-second anaerobic test (MONARK 894E, MONARK Company, Sweden) was used. Participants pedalled as fast as possible, adjusting to the prescribed resistance load within 3 to 4 seconds, and started timing for a 30-second all-out cycling exercise. The average power over 30 seconds, total work output, maximum power output within 5 seconds, and minimum power output within 5 seconds were recorded.

  38 days

Study Arms (1)

Experimental group

EXPERIMENTAL

A total of three tests were conducted on all participants, each time between 6:00 and 9:00 in the morning. The first test (first day of slow weight reduction, T1) was on 26th March, the second test (first day of rapid weight reduction, T2) was on 26th April, and the third test (the day before the competition, T3) was on 3rd May.

Other: Experimental group

Interventions

Experimental group OTHER

This study included 16 male freestyle wrestlers from Sichuan Province, China. Participants were tested at three time points: the first day of slow weight reduction (T1), the first day of rapid weight reduction (T2), and the day before competition (T3), with measurements taken for physiological performance, mental state, and sleep quality.

Experimental group

Eligibility Criteria

• Age: 18 Years - 30 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Participants must be male freestyle wrestlers aged 18 years or older
• Athletes should be preparing for the 2024 Chinese Wrestling Championships
• Individuals must be willing to undergo all tests and assessments at the three specified time points (T1, T2, T3) over the 38-day study period
• Participants should be in good health, with no medical conditions that would prevent them from completing the study
• Athletes must be undergoing a combined slow and rapid weight reduction strategy as part of their regular training regimen

You may not qualify if:

• Individuals with a history of severe cardiovascular, metabolic, or endocrine disorders that could affect the study outcomes
• Wrestlers who are unable to comply with the study's testing schedule or intervention protocols
• Participants with any condition that would make them unsuitable for the anaerobic power testing or blood sampling
• Wrestlers who are unwilling or unable to provide informed consent

Sponsors & Collaborators

• Chengdu Sport University: lead

Study Sites (1)

Chengdu Sport University

Chengdu, Sichuan, 610041, China

Location

MeSH Terms

Conditions

Body Weight Changes; Weight Loss; Sleep Initiation and Maintenance Disorders

Condition Hierarchy (Ancestors)

Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms; Sleep Disorders, Intrinsic; Dyssomnias; Sleep Wake Disorders; Nervous System Diseases; Mental Disorders

Study Officials

• Xiong Weizhi, Dr

  Chengdu Sport University

  STUDY CHAIR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: PREVENTION
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Model Details: The participates of the study were 16 male freestyle wrestlers from Sichuan Province, China, preparing for the 2024 Chinese Wrestling Championships (4th to 12th May 2024). Based on their competition categories, they were to participate in five weight classes (57, 61, 65, 70, and 74 kg), with a total of 16 individuals (four in the 70 kg class, and three per other class). The study period was 38 days prior to the competition. Based on the training schedule and weight reduction characteristics, it was divided into a slow weight reduction phase (where athletes reduced weight slowly by adjusting their dietary structure and increasing the volume of aerobic exercise) and a rapid weight reduction phase (where athletes achieved rapid weight loss by further restricting water intake and adjusting their diet).

Study Record Dates

• First Submitted: August 1, 2024
• First Posted: August 7, 2024
• Study Start: March 26, 2024
• Primary Completion: May 2, 2024
• Study Completion: May 3, 2024
• Last Updated: August 9, 2024

Record last verified: 2024-08

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)