Recruiting

Natural Rhythms

Sponsor:

Buck Institute for Research on Aging

Code:

NCT07107386

Conditions

Health

Eligibility Criteria

Sex: All

Age: 55+

Healthy Volunteers: Accepted

Study Details

Brief summary:

The TIME Study is a research project aiming to understand the body's natural rhythms. The goal is to see how daily and weekly changes in our bodies-from what's happening at a molecular level to data from wearable devices-are connected.

What is the study about? This study is trying to create a detailed map of how a person's body changes over time. By looking at information from blood, urine, and other samples, as well as data from smartwatches and other devices, researchers want to learn how our bodies' natural cycles work in healthy older adults. The long-term goal is to use this knowledge to help develop more personalized healthcare in the future.

Who can participate? The study is looking for healthy adults, age 55 or older, who have a smartphone and are able to travel to the Buck Institute in Novato, California, for study visits.

Participants will be asked to:

Attend weekly visits over 11 weeks to provide blood and other samples.

Wear health-tracking devices like a smart ring and watch.

Use a smartphone app to answer questions about their daily routines.

Complete two "challenge" tests, including drinking a glucose solution and exercising on a stationary bicycle.

Return for follow-up visits after 6 and 12 months.

Are there any risks or benefits? Benefits: There are no direct health benefits for participants. However, the information gained will help scientists create better diagnostic tools and treatments for future generations.

Risks: The main risks are minor discomfort from things like blood draws or skin irritation from the wearable devices. All personal information and data are kept private and secure.

Conditions

Health

Study ID

NCT07107386

Start date

Jun 15, 2025

Status verified date

Aug, 2025

Completion date

Jun, 2028

Anticipated

Primary completion date

Jun, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 55+

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Healthy adults aged 55 years or older.
  • Own a smartphone capable of running study-specific apps.
  • Willing and able to attend in-person visits at the Buck Institute in Novato, CA.
  • Reside in the Pacific or Mountain Time Zones.
  • Able to speak, read, and write English.
  • Willing to wear study devices continuously and allow researchers access to all data.
  • Able to provide informed consent.

Exclusion Criteria:

  • Hospitalization within the last 3 months.
  • Needing assistance with daily living activities.
  • Working night or irregular shifts.
  • Certain musculoskeletal, pulmonary, or cardiovascular conditions.
  • Uncontrolled high blood pressure (BP > 180/100 mmHg).
  • Bleeding disorders, anemia requiring treatment, or recent blood donation.
  • Poor vein access.
  • Unstable health conditions.
  • Chronic antibiotic use.
  • Certain psychiatric disorders.
  • Use of excluded medications, supplements, or products, including certain antibiotics or frequent sleep aids.

Study Design

Enrollment

120 participants

Anticipated

Interventions and Outcome Measures

Primary outcome measure

  • Generation of a longitudinal multi-omic and digital health dataset characterizing biorhythms in older adults [ Time Frame: 12 months ]

Central Contacts and Locations

Central contacts

Brianna Stubbs, Research Assistant Professor, PhD.

(415) 209-2072TIME-Study@buckinstitute.org

Alison Le, Project Manager

TIME-Study@buckinstitute.org

Locations

Buck Institute

Recruiting

Novato, California, United States, 94945

Contacts

Brianna Stubbs, Research Assistant Profressor, PhD.

4152517451time-study@buckinstitute.org

Alison Le, Project Manager

time-study@buckinstitute.org

Principal Investigator:

Brianna Stubbs, Research Assistant Professor, PhD.

More Information

Sponsor

Buck Institute for Research on Aging

Last update posted

Aug 15, 2025

Last verified

Aug, 2025

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Buck Institute for Research on Aging on 2025-08-15.