A good upper ab workout also involves doing the butterfly. An individual has to take the basic position of a crunch by sitting on the floor with the knees bent and the feet separated by shoulder width. The knees should be kept on the side with the heels coming together. The position should have the look of the wings of a butterfly, thus the name of the exercise. While keeping the legs bent, the person should crunch, hold for 1 or 2 seconds, while going back to the original position. The exercise works out the the centered area by keeping the leg muscles from working like in a conventional crunch.
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