Mass moment of inertia is calculated by multiplying an object's center of mass by the square of the distance to its axis of rotation. If that sounds a lot like torque, that's because it is.

The best she can do is increase the moment of inertia again to decrease the angular speed. Yes, it’s a tough move, but that’s why they’re Olympic divers. Comments ...

The phenomenon is not abnormal — a shift in any object’s mass on earth relative to the axis of rotation will change a moment of inertia, though most are too small to be measured.