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How to Do a Diamond Crunch Sit-up

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Abdominal crunches come in all sizes and shapes, but they have the same purpose--working the abs. One of the variations of a crunch is the diamond crunch. This move allows for some variation in anyone's ab workout and also works a number of different muscles.

Difficulty: Moderately Easy
Instructions
  1. Step 1

    Begin by sitting down on the floor and laying down on your back. Stretch out your legs, straight from the body. Place the hands behind the head.

  2. Step 2

    Bend the legs at the knees, without lifting them off the ground. Put the soles of the feet together, so the legs form a diamond shape. Make sure the legs remain firmly on the ground.

  3. Step 3

    With the hands behind the head, lift the shoulders off the ground like a normal crunch. Repeat this with varying counts, such as a two up/down and three up/down count. Do the different counts for two to three 8-count reps.

  4. Step 4

    Make things a bit more challenging by adding a slight pelvic thrust to the crunch. As the head comes up, slightly lift the pelvic area up off the floor. This will help work the lower abdominal region.

  5. Step 5

    The best results come from multiple reps and varying counts. Add in pulses between the different counts. A pulse means not lowering the head back to floor, but instead stopping halfway down and lifting back up. A pulse should resemble the crunch without the head returning to the floor.

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