Astrid mcguire youtube workout

Want to watch this workout in real time? Check out CosmoBody, the new fitness and lifestyle video channel.

Don't shy away from medicine balls because you don't know what to do with them.

CosmoBody trainer Astrid McGuire designed the medicine ball workout below to seriously sculpt your core while you work your arms and legs too. So grab a medicine ball with two handles that weighs in around 8 to 10 pounds, and get to it:

(Oh, and if you don't have a medicine ball with handles?

Just use a dumbbell, and place your palms on the ground for any moves that begin in plank position.)

1. Medicine Ball Swing: Stand with your feet slightly wider than shoulders-width apart.

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You don't need a thing for this abs workout with our trainer, Astrid McGuire.

Astrid McGuire as she motivates you with step-by-step instruction to ensure correct form and help you get the most out of each exercise.

Grab one medicine ball handle in both hands with your palms facing down. Keeping your chest high, your shoulders away from your ears, and your elbows locked, lower into a squat and let the weight hang between your legs. In one explosive movement, swing the medicine