These moves might look old-school, but add this core finisher to your routine and you’ll shred your abs fast. Prepare to be sore for days
Trainer: Bobby Maximus, general manager, Gym Jones, Salt Lake City
Time: 10 minutes

“Now that many guys think they should never do sit-ups, they’re incredibly weak in the movement. But you need them to perform better in many sports, and for more defined abs.” – Bobby Maximus

Related: Want A Six-Pack? Stop Doing Crunches & Do These 4 Things Instead

DIRECTIONS: Do these exercises as a circuit, performing them in order for 30 seconds each. Once you’ve completed all four, rest for 30 seconds. That’s 1 circuit; do 4.

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1. Sit-Up
Lie on your back with your heels firm and knees bent 90-degrees. Keep your hands in a fist in front of your chest. Now raise your torso to meet your upper legs, keeping your back straight throughout. Lower your torso back to the floor.

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2. Flutter Kick
Lie on your back with your arms by your sides, palms down. Lift your feet and shoulders slightly off the floor. Now make small, rapid scissor kicks in the air – one leg rising while the other falls – while keeping your abs contracted.

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3. V-Sit Kickout
Sit in a V position: feet off the floor, hips and knees bent, torso at a 45-degree angle. Your arms should be straight out in front of you. Lower your torso and straighten your legs, keeping your legs off the floor. Return to the V-sit.

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4. Plank
Assume a push-up position, but with your elbows bent and your weight resting on your forearms. “Push” your upper back toward the ceiling. Brace every muscle in your body, especially your abs and glutes, as if you’re about to be punched in the gut.