AI coach in your pocket: text prompts aim to boost daily activity
NCT ID NCT06880315
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This pilot study tests whether personalized text messages created by a large language model (AI) can encourage people to be more physically active. Fifty adults will receive daily prompts on their iPhones and Apple Watches for 14 days, comparing personalized messages to generic ones. The goal is to see if AI-tailored coaching can increase step counts and inform future versions of the My Heart Counts app.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
personalized LLM-generated coaching prompts
What this could lead to
If it works, this could point toward a simple, low-cost way to help people become more active using personalized text messages.
What could go wrong
This is a very small pilot study with only 50 participants over 14 days. Results may not apply to everyone, and the effect of personalized prompts may be small or short-lived.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.