Tip of the Day - Triceps Overhead single arm dumbbell extensions - great finishing movement for after you’ve finished lying extensions, pushdowns etc. I personally like doing these seated. Start with the dumbbell raised overhead with a straight arm, with your bicep against the side of your head. Slowly lower the dumbbell behind your head keeping your bicep close to your head, being careful not to let your elbow drift away! Do around 8-10 reps first, then 4 reps of slow negatives, pressing the dumbbell straight up and lowering slowly.