.ai
Your AI Personal Trainer
Smarter Than an App. Cheaper Than a Coach.
Most fitness apps give you random workouts.
You need a program.
Generic Plans
Cookie-cutter workouts that ignore your training history, equipment, and injuries.
No Progression Intelligence
No idea when to increase weight, when to deload, or if you're overtraining.
$200/mo Coaches
Or you pay a fortune for a human trainer who still tracks everything in a spreadsheet.
Everything a great coach does.
Powered by AI.
Periodized Training Blocks
Full weekly programs designed around your goals, experience, and schedule — not a random workout each day.
Progressive Overload Engine
Tracks every set. Knows when you're ready to go heavier. Calculates your estimated 1RM and recommends exact weight jumps.
Automatic Deload Weeks
Detects fatigue from your ratings, soreness, and completion patterns. Programs recovery before you burn out.
Strength + Cardio Programming
Pace targets calculated from your mile time. Interval structure. Distance progression. All alongside your lifts.
Flexible Scheduling
Missed a day? Make it up. Want extra work? AI generates a session that complements what you've already done.
Gym-Ready UX
Plate calculator, NSCA warm-up ramps, rest timer with haptics, one-tap logging. Built for the gym floor, not the couch.
Four steps to smarter training
Tell us about yourself
Experience, equipment, goals, injuries, age
Get your personalized plan
AI generates a full training block with coaching rationale
Train with smart cues
"Try 160 lbs today — you've hit 155×8 twice in a row"
Review, adapt, progress
Weekly recap, give feedback, get an adapted plan
How SinewFit compares
Fitbod picks today's exercises. SinewFit programs your training block.
A human coach at 25× the price. SinewFit's AI never forgets your history.
They can't even log your reps. SinewFit tracks every set, weight, and PR.