Role: Quality Assurance (QA) Tester

Objective: Test the Erg mobile interface for one hour of continuous data entry.

Description: Simulate a high-pressure environment to see if the interface layout causes "input fatigue." Testers must report any button-mashing errors, readability issues under low-light conditions, or lag in the biometric data syncing feature.

Deliverable: Bug Report + UX Friction Summary.