The dumbbell decline triceps extension places your arms in a mechanically advantageous position that maximizes long-head triceps stretch and loading throughout the full range of motion. Master this movement and you will build the kind of dense, thick tricep mass that shows from every angle.
Lie on a decline bench set to 30 to 45 degrees, holding a dumbbell in each hand with arms extended directly above your chest and palms facing inward.
Keeping your upper arms locked perpendicular to your torso, hinge only at the elbows and lower the dumbbells slowly toward your temples or just behind your head.
Pause briefly at the bottom when you feel a deep stretch in the triceps without letting your elbows flare wide.
Drive the dumbbells back to full extension by squeezing the triceps hard at the top, stopping just short of locking out to keep constant tension on the muscle.
Common mistakes
Letting the upper arms drift forward during the lowering phase, which shifts load off the triceps onto the shoulders. Fix this by consciously pinning your elbows in place and moving only from the elbow joint.
Using too much weight and shortening the range of motion, eliminating the valuable stretch position. Fix this by selecting a load that allows you to bring the dumbbells fully behind the plane of your head with control.
Rushing the eccentric and losing control of the descent, reducing time under tension and risking elbow strain. Fix this by taking a full two to three count on the way down on every rep.
Pro tip — On the final rep of each set, hold the fully stretched position at the bottom for a two second isometric pause before pressing back up. This recruits the deep muscle fibers of the long head that a fast repetition tempo never reaches.