Body Fitness Profile
Most fitness apps give you one number. fitn3s maps every muscle group — and shows you how you're improving over time, zone by zone.
Body Fitness Profile
Your training across all zones
Upper Body
L18
Developing
Core
L24
Strong
Lower Body
L14
Developing
A level (1–40) for every muscle group
The same 40-level scale used for your push-up and wall-sit test, now applied individually to Shoulders, Chest, Back, Arms, Triceps, Core, Glutes, and Legs.
Built from your actual training
Every workout you complete feeds the profile. The more you train a muscle group — and the more progressions you earn — the more accurate your score becomes.
Progress lines, not just today's snapshot
See where you were 1 month and 3 months ago on the same chart. Spot the zones that are improving and the ones that need attention.
Each band represents a meaningful real-world fitness tier — anchored in actual performance benchmarks.
Just getting started. Building habits and movement patterns. Improvement is fast here.
Consistent training is paying off. 15–25 push-ups, 45–90 s wall sit.
Seriously fit. 30–50 push-ups, 2–3 min wall sit. Passes military standards.
Elite bodyweight fitness. 60+ push-ups, 3–5 min wall sit. Top tier.
fitn3s is honest about what it doesn't yet know. Each body part gets a confidence label based on how much training evidence backs it up.
High confidence
Multiple progressions earned across several workouts. This score reflects proven performance — you've hit targets at multiple distinct levels.
Growing
You've started training this zone and earned some progressions. More workouts and bumps will sharpen the estimate.
Early estimate
No direct training data yet for this zone. The estimate is borrowed from related muscle groups or your fitness test result. Train this zone to get a direct score.
The fastest path to high-confidence scores is earning progressions — not just logging workouts.
Push past your rep targets
When an exercise feels easy, do extra reps. Every time you exceed your target 3 sessions in a row, your target increases — and your confidence score grows faster.
Train every zone at least once a week
Dotted segments (early estimates) turn solid after consistent direct training. One week of dedicated work on a muscle group is enough to start building a real score.
Take the fitness test
The 5-minute fitn3s fitness test gives your whole profile an instant calibrated baseline. Great for new users or after a long training gap.
Why doesn't my profile update immediately after one workout?
The profile reflects your consistent performance over time, not just the last session. Scores update on every load, but meaningful changes require multiple progressions — that's by design.
What's the difference between the fitness test and the Body Fitness Profile?
The fitness test gives a global upper/lower baseline in 5 minutes. The Body Fitness Profile builds a richer picture zone-by-zone from your actual workouts. They complement each other.
Can my level go down?
Yes. If you stop training a zone for 2+ weeks, the recency signal decays and your level will gradually decrease. This reflects real detraining — and tells you which zone to revisit.
What about full-body exercises like Burpees or Mountain Climbers?
Full-body exercises have their own level card in your profile, so you can see how you're progressing at them specifically. Because they recruit so many muscle groups at once, they're tracked independently rather than split across zones — train specific body parts directly to move those zone scores.
Ready to see your full-body profile?
Free to use. No equipment needed. Your profile builds itself as you train.
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