What You'll Need: just a mat and some floor space
What You'll Do: go through each exercise, timing for 1 minute each (or 30 seconds in some cases). Repeat the full workout 2 times for a total of 10 minutes.
Alternating Knee to Elbow Planks - start in a high plank position, spine aligned. Bring your left knee out wide and up to reach your left elbow. Place that leg back on the ground and bring your right knee out and up to meet your right elbow. Keep alternating legs for the full minute, maintaining a flat back and tight abs.
Side-Lying Oblique Crunches - lie on one side, keeping your bottom arm extended out on the floor and top arm bent with your hand behind your head. From there, crunch up to the side so your elbow meets your knees. Continue the crunches for 30 seconds on one side, then switch to the other. Trainer Tip: if you want to make it easier, crunch up using only your top leg, and keep the bottom leg extended out straight. Harder = keep both legs straight and "V" up.
Hip Twist Planks - start in a high plank position and rotate your hips to one side, keeping your upper body still and hips high. Immediately twist your hips to the other side. Keep alternating twists for 1 minute. Trainer Tip: remember to keep your hips at relatively the same height (i.e. you're not dipping your hips to the floor, but rather twisting them slightly side to side.
Raised-Leg Russian Twists - sit on the floor with your feet raised, upper body leaned back slightly to engage the abs. Alternate twisting quickly from side to side for 1 minute, watching your hands as you twist (allows for more torso rotation and therefore more oblique engagement).
Cross-Body Mountain Climbers - one of my favorites! This one is a little more cardio-heavy but still workouts your obliques just the same. Start in a high plank and quickly alternate bringing your knee to the opposite side of your chest. In the pictures it looks like I'm just stepping up, but try to make this more of a cardio move by "running". Keep going for 1 minute.
Repeat 2 times through for the full 10-minute workout.