A. Tree Sit (Wall Sit)
1. Stand in front of a wall (about 2 feet in front of it) and lean against it.
2. Slide down until your knees are at about 90-degree angles and hold, keeping the abs contracted, for 20-60 seconds.
3. Come back to start and repeat, holding the squat at different angles to work the lower body in different ways.
4. To add intensity, hold weights or squeeze a ball between the knees.
C. Push up
1. Place your hands about 36 inches apart on either the floor or the wall.
2. Lower yourself until your chest almost touches the floor or the wall. Breathe in as you perform this step.
3. Press your upper body back up to the starting position. Breathe out as you perform this step.