Say goodbye to basic crunches and hello to three muscle-torching crunch variations to build core strength. For this workout, you just need one of the best yoga mats and a resistance band or loop ...

Say goodbye to basic crunches and hello to three muscle-torching crunch variations to build core strength. For this workout, you just need one of the best yoga mats and a resistance band or loop ...

Of all the abdominal exercises, the basic crunch is one of the most effective. The key is to keep the movement slow and to focus on good technique. Lie on your back with your knees bent ...

Credit: Getty Images Say goodbye to basic crunches and hello to three muscle-torching crunch variations to build core strength. For this workout, you just need one of the best yoga mats and a ...

The basic crunch is an excellent abdominal strength training exercise to work your upper abs. However, done incorrectly, crunches can give you backache, put strain on your neck and create tension ...