90-Day Health Roadmap: Feed Your Wearable Year-End Data Into ChatGPT and Get a Prioritized Plan

What You'll Learn

• Why year-end wearable data is the most valuable health input most people never use
• How to export 90 days of data from Apple Health or Garmin in under 10 minutes
• The exact prompt that converts raw health data into a prioritized 90-day plan
• What a good AI health coaching output looks like - and what to do with it
• How to build the weekly check-in habit that makes the plan stick

The Data You Already Have

New Year resolutions built on vague intentions fail at roughly the same rate every January. "Exercise more," "eat better," and "sleep more" are intentions, not plans. A plan requires a baseline, a target, a timeline, and checkpoints.

Most people reading this have 90 days of surprisingly detailed health data sitting in an app they rarely open. Apple Health and Garmin Connect track sleep duration, sleep quality, resting heart rate, heart rate variability, active calories, step count, workout frequency, and - on Apple Watch Series 4 and above - atrial fibrillation detection and blood oxygen levels.

That data is not just a fitness log. It is a 90-day behavioral baseline. And combined with the long-context file analysis capability of ChatGPT-4o, it becomes the foundation for a genuinely personalized Q1 health plan.

Step 1: Export Your Data

From Apple Health (iPhone):

The most complete export method uses a free app called Health Export. Open the app, select the date range (last 90 days), choose CSV format, and export. The file contains all your tracked metrics in a structured spreadsheet format.

From Garmin Connect (iOS or Android):

Open Garmin Connect, go to More > Settings > Account Information > Garmin Health Data Export. Choose a custom date range for the last 90 days and download the CSV.

Step 2: Write Your Goals

Before uploading, write your top 3 health goals for Q1 in plain sentences. Being specific matters here.

Vague goal: "Exercise more." Specific goal: "Run 3 times per week, average 25 minutes per run, by March 31."

Step 3: Run the Prompt

"I'm attaching my health data export from [device]. My top goals for Q1 are [X, Y, Z]. Act as an evidence-based health coach, not a diagnostician. Identify the 2-3 metrics most worth improving and give me a specific 90-day action plan with weekly milestones. Flag where I should verify findings with my doctor."

Ready to optimize your life?