NCT05698849

Brief Summary

To determine the effects of a moderate amount of amino acids on the rate of water absorption and availability as a precursor fluid for sweat. Young and healthy (male or female) volunteers will take part in three experimental trials. In each trial, volunteers will be given one of two commercially available sports drinks or a commercially available sport drink with added amino acids in a double-blinded, randomised, crossover design. Each drink will be a single 550 mL bolus. All beverages will be labelled with deuterium (D2O). Trials will be compared for temporal accumulation of deuterium in plasma over the course of 60 minutes. Whole blood measurements of haemoglobin and haematocrit will also be made and plasma volume changes calculated. It is hypothesised that the amino acid trial will increase the rate of fluid absorption.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
15

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started Aug 2021

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

August 4, 2021

Completed
6 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

January 27, 2022

Completed
6 months until next milestone

Study Completion

Last participant's last visit for all outcomes

July 11, 2022

Completed
6 months until next milestone

First Submitted

Initial submission to the registry

January 16, 2023

Completed
10 days until next milestone

First Posted

Study publicly available on registry

January 26, 2023

Completed
Last Updated

February 7, 2025

Status Verified

January 1, 2023

Enrollment Period

6 months

First QC Date

January 16, 2023

Last Update Submit

February 4, 2025

Conditions

Rate of Water Appearance/Delivery in the Blood Water Balance

Outcome Measures

Primary Outcomes (3)

  • Time at which drink absorption rate was maximum (tmax)

    Determined from D2O values in venous blood samples collected before and after drink ingestion

    60 minutes

  • Maximum absorption of drink (Cmax)

    Determined from D2O values in venous blood samples collected before and after drink ingestion

    60 minutes

  • Area under the curve for D2O

    Determined from D2O values in venous blood samples collected before and after drink ingestion

    60 minutes

Secondary Outcomes (4)

  • Plasma volume

    60 minutes

  • Plasma osmolality

    60 minutes

  • Urine specific gravity

    60 minutes

  • Urine volume

    Post-trial (at 60 minutes)

Study Arms (3)

Commercially Available Sports Drink A

PLACEBO COMPARATOR

A commercially available flavored electrolyte solution, The Coca-Cola Company

Other: Composition of Sports Drink

Commercially Available Sports Drink B

EXPERIMENTAL

A commercially available flavored carbohydrate-electrolyte solution, PepsiCo

Other: Composition of Sports Drink

Commercially Available Sports Drink A with added Amino Acids

EXPERIMENTAL

The same as sports drink A above (a commercially available flavored electrolyte solution, The Coca-Cola Company), but with the addition of a small amount of amino acids.

Other: Composition of Sports Drink

Interventions

Composition of Sports DrinkOTHER

The composition of sport drinks will be manipulated to determine the effect of drink composition on the appearance of ingested water in body fluid.

Commercially Available Sports Drink ACommercially Available Sports Drink A with added Amino AcidsCommercially Available Sports Drink B

Eligibility Criteria

Age18 Years - 50 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Generally fit and healthy (determined by health screen questionnaire)
  • Recreationally active (minimum 3 hours of physical activity per week including walking)

You may not qualify if:

  • Any cardiovascular, gastrointestinal, renal or acute/chronic health conditions that may influence the outcomes
  • Smoking (including vaping)
  • BMI of greater than 30 (combined with a body fat percentage greater than 20%) or BMI lower than 17.5

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Loughborough University

Loughborough, Leicestershire, LE11 3TU, United Kingdom

Location

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
DOUBLE
Who Masked
PARTICIPANT, INVESTIGATOR
Masking Details
Double-blind
Purpose
BASIC SCIENCE
Intervention Model
CROSSOVER
Model Details: Double-blind, randomised, crossover design
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Senior Lecturer in Nutrition

Study Record Dates

First Submitted

January 16, 2023

First Posted

January 26, 2023

Study Start

August 4, 2021

Primary Completion

January 27, 2022

Study Completion

July 11, 2022

Last Updated

February 7, 2025

Record last verified: 2023-01

Data Sharing

IPD Sharing
Will not share

Locations

GB(1)