Sit-Ups

Where to put the phone

Side on, lying flat with the phone low and level with the floor. Hips and shoulders both in frame.

Stand side on. The depth and the line of the movement are clearest from the side.

What closes a rep

From lying flat, bring the torso up past vertical, then lie back down. The rep closes on the way back.

What makes the counter wait

If the shoulders never leave the floor line, nothing closes. Partial crunches are a different movement in the library.

One tip

Anchor the feet if you like. The camera reads the trunk, not the feet.

After the set

Every set ends with the same recap: reps counted, time, pace, the longest run, pauses, whether the second half held up, and the camera angle the phone actually saw. Technique detail is measured for the recap and never used to refuse a rep. Why we count and do not grade →