The overhead triceps extension is good for working out your tricep muscles. You can also use an elastic rope instead of a dumbbell for this exercise.
Initial position: Sit on a bench (with back support or without) and hold one dumbbell with both hands. Extend your arms fully and raise the dumbbell up.
What to do:
Bend at the elbows and lower the dumbbell behind your head.
Keep your elbows steady and pause for one second.
Extend your arms and return back to the initial position.
Repeat 20 times.
3. Bicep curls