Four exercises to get you a sizzling summer six-pack

Done in 10 minutes

The plan: Do these four moves three times a week, and you'll see more definition in a month or less. For faster results, add 20 minutes of cardio.

You need: Hand weights

Lunging wood chop

Step into a forward lunge, lifting one weight above one shoulder with both hands. Stay in lunge as you bring the weight down toward lunging knee and across toward opposite hip in one fluid motion (like a wood chop). Keep chopping for 10 to 12 reps. Switch sides. Do three sets. 

Perfect your form: Avoid extending knee beyond toes.

Dial it down: Ditch the hand weight.

Amp it up: Increase reps.

Twisting V-sit

Sit with knees bent, feet on floor, elbows at chest. Lean back and lift legs until shins are almost parallel to floor. Start to twist from side to side and crunch down toward floor, with each elbow nearly grazing it. Do three sets of 10 to 12 reps. 

Perfect your form: Draw belly in as you lengthen spine to protect lower back.

Dial it down: Do fewer reps.

Amp it up: Straighten legs to a 45-degree angle.

Rope climber

Lie on back with knees bent and feet flat on floor. Raise arms up toward ceiling. Engage your core and lift shoulders off floor as you reach one hand above the other, as if climbing a rope. Do three sets of 10 to 12 reps. 

Perfect your form: Lift with your abs (not your neck!).

Dial it down: Do crunches with hands behind head.

Amp it up: Lift feet until shins are parallel to floor and hold as you "climb the rope."

Scissor kicks

Lie on back with hands by sides, palms down. Flatten lower back into floor and engage abs and glutes. Bend knees to chest to begin set. Extend legs, keeping feet raised. Cross legs, kick apart, then cross again with other leg on top, for one rep. Do three sets of 10 to 12 reps.

Perfect your form: Keep spine in contact with floor.

Dial it down: Do fewer reps.

Amp it up: Lower legs closer to floor and kick wider.

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