Rehydration in long distance athletes. An open randomized controlled cross-over Nuclear Magnetic Resonance (NMR) study

Not Applicable

Completed

• Conditions: Rehydration in athletes; Not Applicable

• Registration Number: ISRCTN65664109
• Lead Sponsor: Recuperat-ion Electrolitos, S.L. (Spain)

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Completion: 2004-01-24
• Study Start: 2007-04-02
• Last Update Posted: 4 October 2021

Recruitment & Eligibility

• Status: Completed
• Sex: Not specified
• Target Recruitment: 12

Inclusion Criteria

1. Healthy male trained athletes, between 25 and 35 years old
2. [(dot)O2maxR] 40-50 %
3. Maximum heart rate reserve (HRRmax) 55-65 %
4. Regular physical activity three times a week with duration of 30-40 minutes each session
5. Body mass index (BMI) < 25 kg/m2,
6. Euhydrated (plasma osmolality 280-300 mOsm.L-1)
7. Normal physical examination, laboratory analysis (including electrolytes) and electrocardiogram recording
8. Informed consent in writing

Exclusion Criteria

1. Positive answer(s) to one or more questions listed in the Physical Activity Readiness Questionnaire (PAR-Q)
2. Drugs, tobacco, and alcohol abuse
3. Dietary supplements and nutritional ergogenic aids used for enhancing physical and athletic performance
4. History of cardiovascular, liver, respiratory, renal, neuropsychiatric, and endocrine/metabolic diseases
5. Any disease or treatment in the previous seven days before randomization
6. Removal or blood lost ? 400 mL in previous three months
7. Any extenuating physical practice in previous week before entering in the study
8. Concomitant participation in any clinical trial or previous participation in any clinical trial in the last 30 days before enter in the study
9. Lack of cooperation due to psychological troubles or psychiatric illness
10. Lack of cooperation (i.e. loss of interest, lack of motivation)

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
The influence of drink volume (150 % of the sweat loss) and its sodium content on rehydration effectiveness after exercise-induced dehydration with two beverages: one with a moderately high sodium content and one with relatively low sodium content.

Secondary Outcome Measures

Name	Time	Method
The influence of rehydration post-exercise in the energetic metabolism of the muscle.