The Effects of Dehydration on the Performance of Judoka

Overview

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 Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Crossover Assignment
    • Primary Purpose: Other
    • Masking: None (Open Label)
  • Study Primary Completion Date: December 20, 2019

Interventions

  • Other: Dehydration
    • Participants will be dehydrated (2% of their body weight) using sauna.

Arms, Groups and Cohorts

  • Experimental: dehydrated
    • The participants will be dehydrated (at least 2% of their body weight) before performing the Sterkowicz test.
  • No Intervention: euhydrated
    • The participants will be normally hydrated (= euhydration) before performing the Sterkowicz test (i.e. no specific intervention will be implemented).

Clinical Trial Outcome Measures

Primary Measures

  • Sterkowicz test
    • Time Frame: Up to 3 weeks
    • Sterkowicz test

Secondary Measures

  • heart rate
    • Time Frame: Up to 3 weeks
    • Heart rate will be determined using the Polar H1 (Polar, Kempele, Finland)
  • Body weight
    • Time Frame: Up to 3 weeks
    • 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)
  • Borg Rating of Perceived Exertion Scale
    • Time Frame: Up to 3 weeks
    • 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.
  • body temperature
    • Time Frame: Up to 3 weeks
    • Body temperature will be determined using the Adtemp 421 Digital Ear Thermometer (American Diagnostics Corporations, Hauppauge, New York, United States of America)

Participating in This Clinical Trial

Inclusion Criteria

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

  • injured – sick – not underaged (18 years)

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Vrije Universiteit Brussel
  • Provider of Information About this Clinical Study
    • Principal Investigator: Laurent Chapelle, PhD student – Vrije Universiteit Brussel

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