10 Best Exercises For Killer Abs

2. Standard Crunch

Adding in standard crunches as part of an ab-focused workout is a good idea, but they can strain your back if you’re not used to it. Crunches work your abs and tone them quickly. While crunches are great for your abs, they won’t work your entire core and won’t burn fat. Start with one set of 10-25 repetitions and work your way up to two sets as you get stronger.