CHARGE: Pilot Trial of Self-directed Use of Resources for Physical Activity
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: LLM alone, LLM enhanced, Sleep promotion.
- Who it may be relevant to
- Registry conditions: Physical Activity. Basic parameters: 18 years — 75 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Center list to be confirmed — check the primary protocol.
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Overview
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.
Detailed description
To prepare for a future fully powered RCT, we are conducting a pilot RCT. The pilot RCT will enroll n=39 insufficiently active primary care patients, and randomize them to one of 3 conditions: LLM alone condition: participants are recommended to use a publicly available, general-purpose LLM for physical activity promotion over the next 3 months (n=13); LLM enhanced condition: participants are recommended to use a publicly available, general-purpose LLM for physical activity promotion over the next 3 months and additionally attend an initial session providing guidance on LLM use and weekly text message with suggestions on using the LLM (n=13); or Control condition: participants are recommended to use publicly available tools to help with sleep (websites with tips for sleep and guided meditation videos) over the next 3 months (n=13). At study onset, all participants will be given basic information about exercise safety. At 3 months, moderate-to-vigorous physical activity will be measured with a validated self-report measure. Feasibility and acceptability outcomes such as recruitment and retention--metrics essential for advancing to a subsequent large-scale trial-will be measured.
Interventions
- Behavioral LLM alone
Participants are recommended to use a publicly available, general-purpose LLM for physical activity promotion - Behavioral LLM enhanced
Participants are recommended to use a publicly available, general-purpose LLM for physical activity promotion over the next 3 months and additionally attend an initial session providing guidance on LLM use and weekly text message with suggestions on using the LLM - Behavioral Sleep promotion
Participants are recommended to use publicly available tools to help with sleep (websites with tips for sleep and guided meditation videos)
Primary outcome measures
- Recruitment feasibility [Time frame: 6 months]
Secondary outcome measures (2)
- Retention [Time frame: 3 month]
- Physical activity [Time frame: 3 months]
Eligibility criteria
Inclusion criteria
- 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.
Exclusion criteria
- 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.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Open label
- Primary purpose
- Prevention
Study locations
Center list to be confirmed — check the primary protocol.
Identifiers
NCT: NCT07654868 · IRB202600162