2. Standard Crunches
Standard crunches again work your abdominal muscles and help to quickly tone up the muscles there. They are a good addition to an ab focused workout, but they can hurt your back when your new to them.
You should also be aware that while crunches are great for your abs, they don’t work the whole core, therefore they don’t burn fat as you do them.
Start off with one set of ten to twenty-five reps and build up to two sets as you get stronger.