The general used technique is called stemming (pushing against two opposite walls).
Position
- X-Large
- Hands: One (points downward) on one wall and one (points downward) on the other wall.
- Feet: One (outside toe edge) on one wall and one (outside toe edge) on the other wall.
- Large
- Hands: Both (pointing downwards) on the back wall.
- Back: On the back wall.
- Feet: Both (ball) on the front wall.
- Medium
- Hands: One (points downward) on the back wall and one (points upwards) on the front wall.
- Back: On the back wall.
- Feet: One (sole) on the back wall and the one (ball) on the front wall. (Switch them on the way.)
- Small
- Arm: Elbow on the back wall and hand (pointing downwards) on the front wall. (Armbar)
- Leg: Foot (outside edge) on the back wall and knee (inside) on the front wall. (Legbar)
Movement
The following video shows the movement (except the first one).