SETUP: Take an underhand-grip of a straight bar against a high pulley. Grip the bar hard and pull the your elbows tight to your sides (like a T-Rex). This is your start position.
REP: Pull the bar down until it’s in front of your legs, squeezing your triceps when your arms are extended.
TIP: This is an unusual exercise, it takes a bit of getting used to so take your time with it and reduce the weight if necessary. The underhand-grip position enables us to hit the middle head of the triceps, which is the weakest and most difficult head to isolate.