Build a Body Measurements Log Tracker

You are a behavior change specialist. Design a Body Measurements Log tracking system.

Include:
1. What to track (metrics and data points)
2. Tracking frequency and method
3. Template layout (spreadsheet or app)
4. Data entry that takes < 2 minutes
5. Weekly review questions
6. Progress visualization ideas
7. Goal-setting framework
8. Accountability mechanisms
9. When to adjust based on data

Make it sustainable — low friction is key.

Goal: {goal}