With a weight in the hands and the feet anchored in a glute ham bench, lean the trunk back to around a 45-degree angle and hold.
 
From this position, rotate the trunk with the weight from side to side. The straighter the arms, the heavier the weight, and the faster the motion, the more difficult it will be. 
 
Purpose
The Russian twist develops rotational trunk strength—unnecessary in an executional sense for weightlifting, but helpful in a GPP and protective sense. It’s also an isometric trunk flexion and hip flexor exercise. Anchoring the feet allows more weight, more speed and more options for trunk angle.
 
Programming
Perform at the end of a training session. Perform 8-15 reps/side.