Read the guide · Behaviour
How Letz Helps You Stick to Your Routine
The hardest part is not knowing what to do—it is continuing to do it. Among the dozens of studied techniques, three stand out: self-monitoring, support delivered when a person is most receptive, and genuine content personalization. That is why Letz insists on a brief check-in, calibrates reminders based on your history, and never sends the same message to everyone. Building a habit takes about six weeks of repetition—and missing a day does not reset anything.
Numbers derived from this rule
| Parameter | Range | Weight | Rule |
|---|---|---|---|
| Resistance training sessions per week | 2–4 sessions/week | 70% | Two or more strengthening sessions per week; weekly consistency forms a habit in about six weeks.Physical Activity Guidelines for Adults · Frequency: training each muscle at least twice per week · Building a workout habit |
Rules and studies
- 01Tracking is the most effective techniqueSelf-monitoring of diet, weight, and activity is consistently associated with greater weight loss; the behavior change technique taxonomy ranks it among the most effective.Letz reduces tracking friction with photo, voice, and search, and the coach recognizes tracking consistency rather than just the outcome.
- 02Building a workout habitIn new gym members, working out at least four times per week for six weeks was the minimum threshold to form a habit; consistency and simplicity predicted habit formation.Onboarding prompts for fixed days of the week, and the plan prioritizes short, consistent sessions over long, infrequent ones during the first six weeks.
- 03Adaptive support at the right momentContext-tailored digital interventions can be feasible and helpful, but their effect varies and must be measured per person and per decision.Letz enforces a daily notification cap and presents a single coach decision at a time; each prompt logs whether it prompted action.
- 04Digital Personalization and BehaviorPersonalized mobile interventions show potential benefits for health behaviors, although outcomes vary across programs.Every message type in Letz has a registered hypothesis and an adherence metric before being considered effective.