Extension Plank
In a plank position, begin to step the feet back as far as you can while maintaining control of hip level. Then return the feet to normal position, and repeat. Complete 10 reps.
Tabletop Lift
Start in a tabletop position, with the body aligned straight. Move the body down to have a seat on the floor, and use arms, core, and legs to lift back into tabletop position. Repeat 10 times.