A killer move that will torch calories as it works your core. Kneel on all fours, toes tucked under, keeping your back neutral. Draw your belly in toward your spine as you contract your abs and lift both knees about 2 inches off the ground.
Keeping abs engaged, bring right knee to nose (shown). Then kick right leg straight out behind you, squeezing your butt (shown); keep lower abs contracted and hips facing the ground to protect your back.
Repeat 8 times; switch legs and repeat.
Advanced leg crunches
A get-ready-for-swimsuit season move from celebrity trainer Eduardo Dias.
1. Lie on your back with your knees bent and a 3-pound dumbbell between your feet. Place your hands, palms down, beneath your sitting bones.
2. Concentrating on your lower abs, use them to bring your knees in toward your chest while lifting your hips, head, and shoulders slightly. Return to the starting position; that’s 1 rep.
Do 15–30 reps 3–4 times a week; you should see results in 4 weeks