Hold the crunch for two seconds before bringing your feet back down to Bicycle Crunches Gif floor d. Kickboxing Crunch Add some pep and power to your standing crunch with this kickboxing-inspired move. For those looking to strengthen your balancing skills, this is the exercise for you. In this reverse crunch variation, the spine is also lengthened and strengthened win-win. Return to the Bicycle Crunches Gif position and repeat on the opposite leg. Avoid using momentum from your legs to pull them in and engage your core muscles instead c. So to help you kick up your core game, we rounded up these killer crunch variations, guaranteed to tighten and tone your midsection. How to: Lie flat on the floor with your arms by your head and your hands reaching for the wall behind you. This kickboxing crunch offers the right combination of strength training and cardio, working out your core and Beste Porno Gif Plaatsen while building endurance, too.