Here’s a guide to the ideal set and rep schemes for the Russian twist based on five common training goals: The Russian twist is a dynamic core movement that focuses on the obliques at the sides of the waist. It also engages the abdominals and the lower back. Russian Twist is one of the more common core exercises. This exercise targets multiple muscles in your core, but the reason for including this exercise is usually to target your obliques. Ab training shouldn't be all about crunches and planks. Here's why the Russian twist needs a spot in your next ab workout. Here’s how to perform a Russian twist : Lift your feet off the floor and plant your sit bones firmly, keeping your knee bent. Hold your arms extended in the direction of you and make a fist or clinch with your hands. Twist to the correct then to one side, and then go back to the point using your core muscles.