Triceps extension with dumbbell seated on a stability ball

Extend the elbow while keeping the upper arm as stable as the variation allows. Return slowly and do not let the resistance pull the joint back abruptly. Keep the same range from repetition to repetition instead of speeding up as you fatigue. Breathe continuously and end the set before technique starts to break down.

Choose a resistance that lets you preserve technique from start to finish. You should feel most of the work in triceps; if you feel sharp pain, joint pinching or a clear loss of control, reduce the load or range and stop if symptoms persist. On unstable surfaces, master the position with light resistance first; stability should limit difficulty before load does.