ZYM · Free AI Form Check
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Upload a clip of one set. Get the key moments of your rep back, with real coaching on what to change.
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Back squat
“My left knee caves on the last rep — mobility or just fatigue?”
@marcus_lifts
CoachYour left knee travels inward as you come out of the hole.
Deadlift
“Back feels rounded at the start. Is it?”
@priya.trains
CoachYour hips rise before the bar does, so the pull starts with your back.
Bench press
“Is my arch too much?”
@dan_o_fitness
CoachYour elbows flare wide at the bottom of each rep.
Overhead press
“Feels like I lean back a lot. Should I stop doing that?”
@sofia.reps
CoachYour ribcage flares and the lean comes from your lower back, not your hips.
Romanian deadlift
“Where should I feel this? I only feel my lower back.”
@tomlifts_
CoachThe bar drifts away from your legs on the way down.
Pull-up
“Am I using momentum without noticing?”
@aisha.k
CoachYour hips swing forward before your elbows start bending.
Front squat
“Keep losing the bar forward at the bottom. Why?”
@nate.g
CoachYour elbows drop as you hit depth and the bar follows them down.
Bulgarian split squat
“Which leg is actually doing the work here?”
@els_trains
CoachYour torso shifts over the front knee, so the back leg is mostly balancing.
Barbell row
“Am I standing too upright for this to count as a row?”
@jm.strength
CoachYour torso rises with each pull, so the last reps are half a shrug.
Hip thrust
“Feeling this in my quads more than anywhere else.”
@kenji.b
CoachYou finish by extending your knees rather than your hips.
Back squat
“My left knee caves on the last rep — mobility or just fatigue?”
@marcus_lifts
CoachYour left knee travels inward as you come out of the hole.
Deadlift
“Back feels rounded at the start. Is it?”
@priya.trains
CoachYour hips rise before the bar does, so the pull starts with your back.
Bench press
“Is my arch too much?”
@dan_o_fitness
CoachYour elbows flare wide at the bottom of each rep.
Overhead press
“Feels like I lean back a lot. Should I stop doing that?”
@sofia.reps
CoachYour ribcage flares and the lean comes from your lower back, not your hips.
Romanian deadlift
“Where should I feel this? I only feel my lower back.”
@tomlifts_
CoachThe bar drifts away from your legs on the way down.
Pull-up
“Am I using momentum without noticing?”
@aisha.k
CoachYour hips swing forward before your elbows start bending.
Front squat
“Keep losing the bar forward at the bottom. Why?”
@nate.g
CoachYour elbows drop as you hit depth and the bar follows them down.
Bulgarian split squat
“Which leg is actually doing the work here?”
@els_trains
CoachYour torso shifts over the front knee, so the back leg is mostly balancing.
Barbell row
“Am I standing too upright for this to count as a row?”
@jm.strength
CoachYour torso rises with each pull, so the last reps are half a shrug.
Hip thrust
“Feeling this in my quads more than anywhere else.”
@kenji.b
CoachYou finish by extending your knees rather than your hips.
Examples of what the coach sends back. Real checks appear here once people start sharing them.
How it works
- 1
Film one setSide on, whole body in frame, 5–15 seconds.
- 2
Upload it hereNo signup, no card. Nine stills are read by the coach.
- 3
Get the rep backThe key moments, what happened, and one thing to change.
No signup required. Only a few still frames are sent for AI analysis — your video stays on your device unless you choose to publish it afterwards.