Atrium (noun) the main part of either auricle of the heart as distinct from the auricular appendix. Also, the whole articular portion of the heart. Atrium (noun) a cavity in ascidians into which the intestine and generative ducts open, and which also receives the water from the gills. See Ascidioidea. Origin: [L., the fore court of a Roman house.]
Single Leg Calf Presses. 1  Set the back rest to upright position. Holding dumbbell in one hand at side, place other hand on top of bench for support. 2  Stand on one foot on edge of bench frame. 3  Stand up on tip toe using free hand to balance yourself. Do not to push yourself up with your hand.
A one arm bent-over dumbbell row with a bench used as support. Two arm barbell bent-over-row: This version uses both arms to lift a barbell from the floor to the stomach in a bent-forward position. The hands are kept pronated and the back straight. Two arm dumbbell bent-over-row: The barbell is replaced by two dumbbells, one for each hand.