The Effects of Dehydration on the Performance of Judoka

Dehydration is a common phenomenon in judo that can lead to negative performance such as a decline in strength, a decline in anaerobic performance, a reduced body fluid balance, glycogen depletion and worsened psychological parameters. Therefore, we want to simulate several judo combats and look at the performances whether they change during a competition day. We also want to see if the results are different in a dehydrated versus euhydrated state.

Study Overview

• Status: Unknown
• Conditions: Dehydration
• Intervention / Treatment: Other: Dehydration

• Study Type: Interventional
• Enrollment (Anticipated): 27
• Phase: Not Applicable

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• judoka
• minimum 18 years
• men and women
• only dehydration: sauna, warm bath, sweat suit

Exclusion Criteria:

• injured
• sick
• not underaged (18 years)

Study Plan

How is the study designed?

Design Details

• Primary Purpose: OTHER
• Allocation: RANDOMIZED
• Interventional Model: CROSSOVER
• Masking: NONE

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
EXPERIMENTAL: dehydrated; The participants will be dehydrated (at least 2% of their body weight) before performing the Sterkowicz test.	Other: Dehydration; Participants will be dehydrated (2% of their body weight) using sauna.
NO_INTERVENTION: euhydrated; The participants will be normally hydrated (= euhydration) before performing the Sterkowicz test (i.e. no specific intervention will be implemented).

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Sterkowicz test	Sterkowicz test	Up to 3 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
heart rate	Heart rate will be determined using the Polar H1 (Polar, Kempele, Finland)	Up to 3 weeks
Body weight	Body weight will be assessed to the nearest 0.002 kg using the WLT 60/120/X/L3 scale (All Scales Europe, Veen, The Netherlands)	Up to 3 weeks
Borg Rating of Perceived Exertion Scale	The Borg Rating of Perceived Exertion scale is a numerical scale (to determine exertion) that ranges from 6 to 20, where 6 means "no exertion at all" and 20 means "maximal exertion.	Up to 3 weeks
body temperature	Body temperature will be determined using the Adtemp 421 Digital Ear Thermometer (American Diagnostics Corporations, Hauppauge, New York, United States of America)	Up to 3 weeks

Collaborators and Investigators

• Sponsor: Vrije Universiteit Brussel

Study record dates

Study Major Dates

• Study Start (ANTICIPATED): October 1, 2018
• Primary Completion (ANTICIPATED): December 20, 2019
• Study Completion (ANTICIPATED): January 30, 2020

Study Registration Dates

• First Submitted: July 24, 2018
• First Submitted That Met QC Criteria: September 18, 2018
• First Posted (ACTUAL): September 19, 2018

Study Record Updates

• Last Update Posted (ACTUAL): September 19, 2018
• Last Update Submitted That Met QC Criteria: September 18, 2018
• Last Verified: September 1, 2018

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Metabolic Diseases; Water-Electrolyte Imbalance; Dehydration
• Other Study ID Numbers: VrijeUniversiteitB

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No