![](https://i.pinimg.com/236x/20/b9/50/20b950c48ee8b77f215e022eaea1b3e2.jpg)
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.
![](https://i.pinimg.com/236x/20/b9/50/20b950c48ee8b77f215e022eaea1b3e2.jpg)