Program first, personalization second
Each mission defines its weekly structure, movement priorities, progression model, conditioning dose, and daily step floor. Jacked, for example, is not calculated as a generic “moderately active” person: its five-session schedule and 8,000-step floor now feed the initial energy estimate used by nutrition.
Equipment, experience, limitations, and trusted scan context can modify exercise selection or add bounded emphasis, but the server preserves the authored schedule. This keeps dose, recovery, and progression coherent.
The body scan is not a weigh-in. It can record posture, symmetry, broad composition direction, and priority muscles. Scale weight remains a separate confirmation because calories and portions should not be changed by an invented visual weight.
Progressive overload with fatigue controls
Repetition ranges and repetitions-in-reserve (RIR) make progression conditional. When the top of a rep range is completed at the intended effort, the next exposure can add a small load. Missed reps or unexpectedly high effort hold or reduce the prescription. Planned variation and lower-stress work keep every week from becoming an unmanaged test.
- Volume: enough hard sets to stimulate adaptation, distributed across the week.
- Effort: most work stops near, not automatically at, momentary failure.
- Specificity: mission priorities shape exercise and volume allocation.
- Recovery: the program accounts for adjacent sessions, aerobic work, mobility, and rest days.
- Feedback: completed load, repetitions, and RIR—not a body photo—govern next-session loading.
Training and nutrition share one load model
The workout calendar is an input to fueling. Protocol frequency and step floors set the initial activity estimate; the mission then determines surplus, maintenance, or deficit. Daily meal targets retain carbohydrate for training rather than allowing a stale onboarding label to understate demand. Once sufficient weight and intake history exists, measured maintenance can supersede the formula estimate.
This separation matters: the initial target is a calibrated hypothesis, while the observed rate of change is evidence. The system should adapt to the person without quietly changing the selected goal.
Evidence base
- Schoenfeld et al. — weekly resistance-training frequency and hypertrophySports Medicine, 2016
- Schoenfeld et al. — dose-response relationship between weekly volume and muscle growthJournal of Sports Sciences, 2017
- Grgic et al. — resistance training to failure and muscular adaptationJournal of Sport and Health Science, 2022
- Garber et al. — ACSM exercise quantity and quality guidanceMedicine & Science in Sports & Exercise, 2011
- Wilson et al. — concurrent aerobic and resistance trainingEvidence on interference and programming variables
- Murphy and Koehler — energy deficit and lean-mass gainsWhy the training goal and energy prescription must agree
Limits and responsible use
A general fitness protocol cannot diagnose injury, disease, or readiness. A scan cannot measure exact body fat, muscle mass, or structural pathology. Pain, pregnancy, cardiovascular disease, recent surgery, disordered eating, and other clinical concerns require appropriately qualified care. Exercise should be stopped when symptoms suggest harm, and loading should never outrun technique or recovery.