You don’t need a complicated routine to target your abs. There’s no need for fancy equipment or a hundred variations of the crunch. In fact, these two flat belly moves can fit in before or after your workout might be more effective in the long run.

This 2-move routine is the perfect easy ab workout: a straight-leg jackknife crunch to target your upper and lower abs, and a weighted Russian twist for your obliques and transverse abdominals. This workout uses intervals to maximize calorie burn and fat loss. Working to reduce the amount of fat in your body will help give you a lean and defined core.