By eHow Sports & Fitness Editor
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Cross training works the body's core but also has great exercises for the lower body. The air squat also known as the body weight squat is infamous for its intensity, but when performed correctly offers a fantastic fast paced workout sure to burn unwanted calories. The fact that air squats tighten and tone the stomach, buns and thighs doesn't do any harm. Look below for guidelines on how to do the air squat exercise.
eHow Sports & Fitness Editor