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Watch these exercise videos to learn how to do a simple seated abdominal crunch and you' ll be able to. Articolazioni forti di crunches. The Perfect Ab Crunch delivers a simple and convenient way to target your upper body and core – all with one. Try these exercises and stretches for your workout routine in this fitness. Everyone knows the value of good abdominal crunches. One Piece of Equipment – Multiple Exercises. Learn how to correct your form. Like these Gym Workouts! Check out the official app co/ 215Vj7h Watch more How to Work Out at the Gym videos:. The crunch is a classic abdominal exercise, but while you' re toning your abs you might be crunching your spine. Reverse crunches are great exercises for building up your lower abs.