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Wearable Photoplethysmography for Non-invasive Hydration Assessment

This study is exploring a new way to measure hydration using wearable devices. Currently, hydration is often checked by measuring body weight changes, fluid intake, and urine, which can be time-consuming. Researchers believe that wearable devices, which use light to detect blood flow patterns just under your skin, might offer a simpler, non-invasive method. The study will involve 30 participants, aged 18 to 45, who will perform stationary cycling exercise. The main goals are to see how well data from wearable sensors and changes in body mass during and after exercise can help understand hydration status. The current status of this study is unclear.

Study design
This interventional study plans to enroll 30 participants to test a new method for assessing hydration.
What's involved
You would perform two 30-minute sessions of stationary cycling exercise and have wearable sensor data collected continuously for 24 hours.
Compensation
Not stated in the trial record.
Follow-up
Wearable sensor data will be collected continuously for 24 hours from the start of exercise through the completion of Day 2 measurements.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07520344

Wearable Photoplethysmography for Non-invasive Hydration Assessment

Recruiting
NAAges 18–45Interventional
PepsiCo Global R&D
~30 participants
Updated 2026-04-09 on ClinicalTrials.gov
What's tested:Exercise

At a glance

Recruiting sites
2 of 2 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Wearable Sensr Data
Measured over Continuous data collection over 24 hours from start of exercise trial through completion of Day 2 measurements.
+1 more outcome measured

Conditions

Hydration Status

Explore related trials

Hydration status

Where it's being run

2 sites across 1 states
Texas2

Who to contact

Anthony Wolfe
[email protected]
574-315-5901
Email the study team

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Do you actually qualify for this trial?

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Eligibility criteria

Inclusion

Study subject is 18-45 years of age, inclusive
Subject is male or female
If female, subject is not pregnant, planning to get pregnant, or currently breast feeding
Subject is willing to avoid alcohol consumption 24 hours prior to visit(s)
Able to speak, write, and read English
Provision of written consent to participate
Subject is not taking medication that may interfere with the study, as indicated on the general health questionnaire (GHQ)
Subject has no health conditions that would prevent completion of the trial, as indicated on the GHQ
Subject is willing to fast overnight (no food or beverage, only water, \~8- 10 hours)
Subject is willing to refrain from vigorous exercise for 24 hours
Subject is willing to eat the exact same food the day prior to each visit to the testing site
Subject is willing to undergo fluid restriction to induce dehydration
Subject is willing to wear a wrist worn wearable device for the duration of the study

Exclusion

Subject has participated or currently enrolled in a clinical trial within the past 30 days
Subject has participated in any PepsiCo trial within the past 3 months
Subject has a condition or is taking medication that the investigator believes would interfere with his/her ability to provide informed consent, comply with the study protocol, which might confound the interpretation of the study results, or put the person at undue risk, as indicated on the GHQ
Subject is employed by, or has a parent, guardian, or other immediate family member employed by a company that manufactures any products that compete with any Gatorade product. If subject is unsure if a company would be considered a competitor to Gatorade, they will be asked to please let the study investigator know the name of the other company and the nature of their relationship to that company before they sign the informed consent.
Subject has a health condition or is taking medication that can be worsened by fluid restriction, as indicated on the GHQ

What this trial measures

  • Wearable Sensr DataContinuous data collection over 24 hours from start of exercise trial through completion of Day 2 measurements.

    photoplethysmogram (PPG) waveform data- optical signals obtained from photoplethysmography, which measure blood volume changes in the microvascular bed of tissue.

  • Body Mass ChangeChange in body mass during 60 min exercise bout and over 24 hours from baseline