CHARGE: Pilot Trial of Self-directed Use of Resources for Physical Activity

Starting soon · Not applicable

Conditions studied: Physical Activity

In brief

This is a pilot RCT examining physical activity outcomes at 3 months across 3 conditions: use of large language model (LLM) fully self-directed; use of LLM with guidance; and use of online tools to help with sleep.

Key facts

Study ID

NCT07654868

Run by

University of Florida

People needed

39

Starts

2026-06-22

Expected to finish

2026-12-15

Last updated by the study team

2026-06-17

Who can join

Age: 18 and older, up to 75. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Age 18-75
• Reports a desire to increase physical activity level
• Not meeting minimum aerobic PA as indicated by L-CAT endorsement indicating level of activity below moderate (moderate defined as >= 5x/week activity or higher)
• Reports willingness to use LLMs to help with exercise goals.
• Access to internet through phone data plan or home Wi-Fi.

You may not qualify if…

• Conditions warranting more extensive supervision of physical activity, including:
• Any history of MI or stroke, arrhythmias, or heart failure
• Uncontrolled hypertension
• Type 1 or 2 diabetes
• COPD or asthma
• Recent orthopedic surgery or fracture
• Advanced Parkinson's
• Pregnant or planning to become pregnant in next 9 months
• Active cancer undergoing treatment
• Recent major surgery (<12 weeks)
• Use of assistive devices for ambulation
• History of eating disorder diagnosis
• Dementia diagnosis
• Unable to read on own.
• Hospitalization for mental health reasons in past year
• Has used LLM to support physical activity goals in prior 3 months.
• Currently enrolled in a structured program to promote physical activity or weight loss.

Full record on ClinicalTrials.gov

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