This is one of the most effective moves for eliciting a high level of muscle activity in the triceps, but thats not the only muscle it challenges. It stimulates many synergistic muscles, including those in your chest, shoulders, and upper back.
1. 1. Hold a dumbbell in each hand with an underhand grip and lean forward keeping the back straight.
2. Have the elbows high and, without moving the upper arm, push the weights back and up to straight arms. Lower only to right angles.