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NCT Number: NCT06543017

Pre Competition Weight Loss of Athletes

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.

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Key information

Conditions

Body Weight Changes Body Weight Dyssomnias Mental Disorders Nervous System Diseases Pathological Conditions, Signs and Symptoms Signs and Symptoms Sleep Disorders, Intrinsic Sleep Initiation and Maintenance Disorders Sleep Wake Disorders Weight Loss

Age range

18 year–30 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Chengdu Sport University

Chengdu, Sichuan, 610041, China

About this study

The goal of this observational study is to investigate the long-term effects of a combined slow and rapid weight reduction strategy on the physiological performance, mental state, and sleep quality of male freestyle wrestlers over the period leading up to a competition. The main question it aims to answer is:

Does the combined weight reduction approach affect the physiological performance, mental state, and sleep quality of male freestyle wrestlers when implemented during the pre-competition phase?

Participants, who are already undergoing this weight reduction strategy as part of their regular training regimen for the 2024 Chinese Wrestling Championships, will be assessed at three distinct time points over a 38-day period. The study will involve the following detailed procedures:

Participant Selection: The study includes 16 male freestyle wrestlers from Sichuan Province, China, with an average age of 20.2 years, and extensive competitive experience.

Study Duration: The observation period spans 38 days prior to the competition, divided into a 30-day slow weight reduction phase and a 7-day rapid weight reduction phase, with the final assessment conducted the day before the competition.

Data Collection: Participants will undergo a series of tests at three time points (T1, T2, T3):

T1: First day of slow weight reduction. T2: First day of rapid weight reduction. T3: The day before the competition.

Testing Indicators:

Physiological performance will be measured through heart rate, blood pressure, blood tests for markers like creatine kinase, testosterone, and immunoglobulin G, body composition analysis, and anaerobic power testing.

Mental state will be evaluated using the Profile of Mood States questionnaire, assessing mood dimensions such as tension, anger, fatigue, depression, energy, confusion, and self-esteem.

Sleep quality will be assessed using the Pittsburgh Sleep Quality Index, a questionnaire that evaluates sleep quality over the past month.

Data Analysis: The study will analyze changes in physiological performance, mental state, and sleep quality from T1 to T3, looking for significant differences that may indicate the impact of the weight reduction strategy.

Ethical Considerations: The study is approved by the Ethics Committee for Human Experiments at Sichuan Sports College and adheres to the Declaration of Helsinki. All participants provide informed consent.

Study Hypothesis: There will be significant differences in the changes in physiological performance, mental state, and sleep quality of male freestyle wrestlers during the pre-competition slow and rapid weight reduction training period.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 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

Exclusion criteria

  • 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

Treatment and study plan

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.

Primary outcomes

  1. Blood Pressure Testing

    Time frame: 38 days

    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.

  2. Serum testosterone

    Time frame: 38 days

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

  3. Serum creatine kinase

    Time frame: 38 days

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

  4. Serum blood urea

    Time frame: 38 days

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

  5. Serum immunoglobulin G

    Time frame: 38 days

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

  6. Serum immunoglobulin A

    Time frame: 38 days

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

  7. Serum immunoglobulin M

    Time frame: 38 days

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

  8. Body Composition Testing

    Time frame: 38 days

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

  9. The Profile of Mood States

    Time frame: 38 days

    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.

  10. Sleep quality

    Time frame: 38 days

    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.

  11. Anaerobic Power Testing

    Time frame: 38 days

    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.

Sponsors and collaborators

Lead sponsor

Chengdu Sport University

Other

Registry information

Official study title

Changes in Physiological Performance, Psychological State, and Sleep Quality of Athletes From Sichuan Province, China During the Pre Competition Weight Loss Stage

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
Aug 7, 2024
Registry last updated
Aug 9, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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