Tips » Weight Training
What is the best exercise to build my triceps muscle?
Working your triceps is as simple as extending your arm through resistance. If you look at the angle formed by your elbow, you'll see that a narrower grip forces the elbow angle to change through a wider range - this is shifting the work to the triceps from the chest.
When you add the incline, you are now resisting gravity at an angle as well. This resistance will come from your anterior deltoids to keep your arms stable when they are not perpendicular to the floor. It will still work your triceps, you are simply involving more deltoids as well.