It forces the hands into the optimal position for side delt activation. (fitstep.com)
The Arnold press is a twisting variation of the standard shoulder press that targets the front and side delts as well as the rotator cuff muscle group, named after the bodybuilding legend Arnold Schwarzenegger. (fitnessandpower.com)
Nothing makes you look wider like a pair of well built shoulders — especially well developed side delts. (fitnessandpower.com)