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Flex one arm, curl your other hand into a C and rest it on top of the bicep: the hand draws one side of a heart and the muscle draws the other. Here is how to get the bicep heart pose right on camera, and how to skip the filming and make the video from one photo.
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The bicep heart pose is the move from the TikTok bicep heart trend. You raise one arm and flex it with the fist near your head, then cup your free hand and place it on top of the flexed bicep with the fingers pointing at the fist. Seen from the front, the curve of your fingers and the curve of the muscle close into a heart.
Face the camera from the waist up. Prop the phone at chest height or ask a friend to hold it, so both your arms fit in the frame.
Lift one arm out to the side and bend it until your fist is near your ear. Squeeze the bicep and turn it slightly toward the lens.
Shape your other hand into a C: thumb underneath, four fingers together on top, like half of a finger heart.
Rest that hand on the top of the bicep, fingertips pointing toward your fist. Adjust until the gap between your fingers and the muscle looks like a heart, then hold it and smile.
Three moments from one of our AI renders: the start, the flex and the finished heart.

Face the camera from the waist up. Prop the phone at chest height or ask a friend to hold it, so both your arms fit in the frame.

Lift one arm out to the side and bend it until your fist is near your ear. Squeeze the bicep and turn it slightly toward the lens.

Rest that hand on the top of the bicep, fingertips pointing toward your fist. Adjust until the gap between your fingers and the muscle looks like a heart, then hold it and smile.
One flexed bicep and the opposite hand curled on top. This is the version most trend videos use, and the one our AI video follows.
Flex both arms in front of you and bring the forearms together so the two biceps form the round top of the heart. Harder to read on camera, but it looks great in a mirror selfie.
Each person flexes the arm closest to the other and you press your fists together, so your two arms make one big heart between you.
For video: start with relaxed arms and a small smile, flex at about the 2-second mark, and land the heart around 4 seconds so it hits with the sound.
If the elbow points at the camera, the bicep disappears. Turn the inside of the arm toward the lens.
A flat palm makes a line, not a curve. Cup the fingers so they bend over the top of the muscle.
With the fist below the shoulder, the heart turns into a sideways blob. Keep the fist up near your ear.
The trick only works when the whole flexed arm and the hand are in the shot. Step back or zoom out.
Each clip was made on this site from the one photo under it. Tap for sound. The people are AI-generated.

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No. The heart comes from the curve of the hand against the arm, so it reads on any arm. Angle matters more than size: turn the flexed arm slightly toward the camera.
Either one. Most people flex the arm on the side of their stronger hand and use the other hand to make the curve, because the curl is easier to control.
Yes. Hold the final position (fist up, hand curled on the bicep) and take the picture from the front at chest height. See our bicep heart picture guide for more tips.
Yes. Add one waist-up photo at the top of this page, with both arms in view, and the AI makes a 7-second video of you doing the pose, with the trend sound and caption. It takes about 5 to 7 minutes.
A variation where you flex both arms and bring the forearms together so the two biceps make the top of the heart. The one-arm version with the hand on the bicep is the one most trend videos use.
One photo in, the bicep heart pose out, with the sound and caption on it.
Make my bicep heart video