How do I film my bicep curls for a form check?

Stand a few meters from your phone, side-on or at a slight angle, with your whole body in frame for the full set. The AI needs to see your hips and knees too, since that is where cheating shows up.

Can AI tell if I am swinging my curls?

Yes. The analyzer measures torso angle change, backward lean, shoulder drift, hip movement, and knee bend on every rep, each against its own threshold, so it can tell you exactly which cheat pattern appeared and on which reps.

What is a full range of motion curl?

The analyzer wants your elbow bent past about 60 degrees at the top and extended past about 140 degrees at the bottom. Reps that miss either end are flagged individually as incomplete.

What does the curl form report include?

Per-rep verdicts on range of motion, elbow drift, every cheat pattern from torso swing to leg drive, eccentric control, and left-right sync, plus tempo timing for both phases of every rep.

AI form check

AI Bicep Curl
form check.

Film a set of barbell curls, upload it, and the AI scores every rep. It measures your elbow angle at the top and bottom, pins your elbows in place, and catches every form of cheating from torso swing to leg drive.

Check my form

Every rep, scored

What the AI checks on your bicep curl.

Full range of motion: Your elbow angle is measured at both ends of every rep, flagging curls that stop short at the top and reps that never fully extend at the bottom.
Elbow position: Your elbows should stay pinned at your sides. Forward drift and elbows rising during the curl are both measured and flagged separately.
Cheat detection: Torso swing, leaning back, shoulders rocking forward, hip thrust, and leg drive are all measured independently, so the report names the exact cheat you used.
Eccentric control: The lowering phase is timed against the lifting phase. Negatives dropped much faster than the curl up get flagged as uncontrolled.
Arm sync: For barbell curls both wrists should move together. Alternating movement and height differences between hands are flagged.

Common faults

Mistakes it catches.

Swinging the weight: Torso momentum doing the first third of the rep. The report separates back lean, hip thrust, and leg drive so you know which one crept in.
Half reps: Stopping short of full flexion at the top or full extension at the bottom, measured by elbow angle on every rep.
Elbows drifting forward: Elbows leaving your sides to shorten the lever, which turns a curl into a front raise hybrid.
Dropping the negative: Letting the bar fall instead of lowering it, which throws away the half of the rep that builds the most muscle.

How it works

From video to verdict.

Film your set

Record one working set with your whole body and the bar or handles in frame.

Upload the video

Create a free account and upload the video to the bicep curl form check.

Read your rep-by-rep report

Each rep is scored with specific flags and the cues to fix the biggest issue first.

Questions, answered

Bicep Curl form check, explained.

How do I film my bicep curls for a form check?: Stand a few meters from your phone, side-on or at a slight angle, with your whole body in frame for the full set. The AI needs to see your hips and knees too, since that is where cheating shows up.
Can AI tell if I am swinging my curls?: Yes. The analyzer measures torso angle change, backward lean, shoulder drift, hip movement, and knee bend on every rep, each against its own threshold, so it can tell you exactly which cheat pattern appeared and on which reps.
What is a full range of motion curl?: The analyzer wants your elbow bent past about 60 degrees at the top and extended past about 140 degrees at the bottom. Reps that miss either end are flagged individually as incomplete.
What does the curl form report include?: Per-rep verdicts on range of motion, elbow drift, every cheat pattern from torso swing to leg drive, eccentric control, and left-right sync, plus tempo timing for both phases of every rep.

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