What muscles are used in Russian twist?

The Russian twist primarily engages the oblique muscles, which are responsible for rotational movements of the torso. It also activates the rectus abdominis (the front abdominal muscles) and the transverse abdominis, contributing to core stability. Additionally, the exercise involves the hip flexors and can engage the lower back muscles for support during the twisting motion. Overall, it's an effective exercise for strengthening the entire core.