Overhead barbell triceps extension. An isolation exercise that targets your triceps brachii.
TRICEPS - SEATED DUMBBELL ONE ARM TRICEPS EXTENSION
Weighted Russian twist. Targets your Internal and External Obliques. Synergistic muscles are your Hip External Rotators, Psoas Major, Iliocastalis Lumborum, Iliocastalis Thoracis, and Quadratus Lumborum. Also known as weighted oblique twist.