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Tricep Dips / Upperbody Exercise

Sit on the floor with your legs bent, both hands just behind your buttocks, palms facing forward. 
Starting with your arms slightly bent, lower your body downwards by bending the elbows. 
Focus on taking the elbows back, rather than letting your arms go out to the side, as this will work the muscle of your chest rather than your triceps. 
Keep the movements smooth and controlled and do at least 3 sets of 12 Reps of which you can build on at a rate comfortable for you. 
You can make this exercise harder by lifting your butt of the floor.