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This video will show you how to do vertical leg crunches correctly. This one of the best ab exercises that target your rectus abdominis.
It will build your abs and you may even start to see six pack abs if you have a low body fat percentage.
The secret to performing vertical leg crunches correctly is to keep your knees straight and then crunch in until you touch your toes.
Once you discover how to do vertical leg crunches, you can start doing this exercise in your ab workouts and full body workouts as well.
You can also try other crunch variations to build your abdominal muscles.
Enjoy the vertical leg crunches.