The easiest way to make a priest's chair is to use the wall-mounted Roman chair and the stool at home directly. Trainers sit on a stool with their arms on the inclined plate, and the angle of the inclined plate can be adjusted telescopically and the height can be adjusted up and down, which is very convenient.

You can find a rectangular board like a skateboard. Let's put a sling on the back and hang it around the neck, just near the chest and stomach, that is, the first two abdominal muscles. You can add some soft things like cotton cloth to the side of the board close to your body. In this way, when doing arm flexion and extension, you can put your arm on the board to limit the backward movement of your arm, so that you can achieve the effect of a priest's chair.

See the figure below. Put a stool in front, just use the sloping board of the Roman chair. You can even adjust the expansion and contraction.