Want to strengthen your abs? Eager to get started? Download the Runtastic Sit-Ups Abs Workout PRO app and turn your abs into a real eyecatcher. Your PERSONAL SIT UPS TRAINER, aka your smartphone, helps you stay on track - draw motivation from our app to ensure you reach your goal. Sit-ups are among the most popular strength exercises when it comes to a flat belly and ripped abs for a reason. They’re a highly effective exercise and will help you take a big leap towards your six pack. Seize the moment, make the most of your motivation and kick-off your journey to perfect abs!