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.
Now, I donât do exclusively bodyweight squats. But Iâm not advocating loading the back. For weight, Iâll hold Dumbbells in each hand while doing a shrimp squat. Extra weight on fewer muscles gives me similar benefits to a weighted barbell squat without the risk.