It is typically performed in repetitive sets and tones the core muscles via a twisting motion focused around the abdomen.
The exercise can help build strength in the upper torso, which may help in sports such as tennis, swimming, baseball and football, track & field, hockey, golf, lacrosse, or boxing.
To perform the Russian twist one sits on the floor and bends both knees while feet are kept together and held slightly above the ground (or put under a stable surface).
When moving one's arms during the exercise, it is crucial to not stop between repetitions or else one will lose the effect of working the abdomen.
It is performed in the same manner, except the legs are straight and the feet are held off the ground (in the V-sit position) for the duration of the exercise.