Adherence

The Cambridge Index, derived from a short self-report questionnaire, validly ranks individuals into distinct physical activity categories (inactive to active) based on their objectively measured energy expenditure and moderate-to-vigorous physical activity time.

Use a validated short questionnaire to track your general activity level. You don't need to count every step perfectly; the goal is to distinguish between being sedentary, moderately active, or very active. This method is reliable enough for large-scale health studies to rank people accurately.