We know everyone likes a good challenge! With the 100 Crunch Challenge program you will not only be able to complete 100 crunches on the last day, but you will work all of those core muscles to create a firm foundation and stabilize your torso. Beside working your way towards a 6-pack, this program will help you strengthen key muscles that prevent low back pain. We know you’re up to the challenge!
Make progress towards achieving your goals with Skimble’s top fitness apps and supportive community. Download Workout Trainer on your Android & Apple devices and begin any of our multi-week training programs to help you reach your fitness goals in 2015!