Begin with context
Goals, space and devices need to be understood before choosing content. A BMI value alone cannot determine whether an activity is suitable.
Feedback within observable limits
A camera may provide information about body position in its frame. Pain, fatigue and instability still need personal attention; an image does not replace how movement feels.
Confirm actual capabilities
Before using Fit, check the activity catalogue, supported devices and instructions in its released version. This description is a direction, not proof of a completed system.