Pre Competition Weight Loss of Athletes
NCT Number: NCT06543017
Status: COMPLETED
Study Type: INTERVENTIONAL
Phases: NA
Conditions: Body Weight Changes
Interventions: OTHER: Experimental group
Sponsor: Chengdu Sport University
Sex: MALE
Age: ADULT
Enrollment: 16
Study Design: Allocation: NA|Intervention Model: SINGLE_GROUP|Masking: NONE|Primary Purpose: PREVENTION
Start Date: 2024-03-26
Completion Date: 2024-05-03
Locations: Chengdu Sport University, Chengdu, Sichuan, 610041, China

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.

Primary Outcome Measures: 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