Hold a plank position, forearms on the platform, feet against the shoulder rests.
1B.
Down.
Continuous breathing throughout.
Develop muscular strength and endurance of the transverse abdominis, rectus abdominis, pelvic floor, multifidus, internal obliques, scapular, and pelvic stabilisers.
Foam cover needed.
Progression: Fewer springs.
Regression: More springs or kneeling plank.