23. Star Plank
Get into pushup position. Move your arms and feet apart as wide as possible—your body will make a star shape. Hold the position with your torso straight and abs braced for 30 seconds.
24. Straight-Leg Barbell Situp
Lie on the floor holding an empty or lightly loaded barbell Opens a New Window. over your chest as in the top of a bench press. Your legs should be extended on the floor in front of you. Perform a situp, raising your torso until it’s vertical. Keep the bar over your head, so it drifts back to an overhead press position at the top of the situp.