Recruiting

Watermelon Juice

Sponsor:

San Diego State University

Code:

NCT03380195

Conditions

Heart Rate Recovery

Eligibility Criteria

Sex: All

Age: 21 - 50

Healthy Volunteers: Accepted

Interventions

Watermelon juice

Sport drink

Sugar water

Water

Study Details

Brief summary:

The purpose of this study was to determine the effects of a pre-exercise, single practical dose of watermelon juice, Gatorade, sugar water or water on heart rate recovery, blood lactate levels, and 24-hour post exercise muscle soreness.

Conditions

Heart Rate Recovery

Study ID

NCT03380195

Start date

Sep 1, 2016

Status verified date

Jan, 2026

Completion date

Dec, 2028

Anticipated

Primary completion date

Dec, 2028

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 21 - 50

Healthy Volunteers: Accepted

Inclusion Criteria:

  • ages of 21-50 healthy adults

Exclusion Criteria:

  • Suffering from injury
  • Chronic inflammatory conditions
  • Required dietary supplement use
  • Required medication which affects blood pressure
  • Smoking
  • Pregnant woman
  • Allergy to watermelon

Study Design

Enrollment

27 participants

Anticipated

Allocation

Randomized

Intervention Model

Crossover

Primary purpose

Prevention

Interventions and Outcome Measures

Arms

experimental: Watermelon juice

active comparator: Sport drink

active comparator: Sugar water

placebo comparator: Water

Interventions

Watermelon juice

Subject drinks 355ml of watermelon juice 1 hour prior to submaximal exercise

Sport drink

Subject drinks 355ml of Gatorade 1 hour prior to submaximal exercise

Sugar water

Subject drinks 355ml of sugar water (22.5g) 1 hour prior to submaximal exercise

Water

Subject drinks 355ml of water 1 hour prior to submaximal exercise

Primary outcome measure

  • Change of heart rate after submax exercise [ Time Frame: Baseline and every minute post exercise for a maximum 20 minutes post exercise. ]

Central Contacts and Locations

Central contacts

Mee Young Hong

619-594-2392mhong2@mail.sdsu.edu

Locations

Exercise and Nutritional Sciences, SDSU

Recruiting

San Diego, California, United States, 92182-7251

Contacts

Mee Young Hong

619-594-2392mhong2@mail.sdsu.edu

More Information

Sponsor

San Diego State University

Last update posted

Jan 21, 2026

Last verified

Jan, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by San Diego State University on 2026-01-21.