Carbon dioxide. Carbon dioxide (chemical formula CO2) is a colorless gas with a density about 60% higher than that of air (1.225 g/L) that is odorless at normally encountered concentrations. Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms.
You should only do ballet in pregnancy if you are used to it. Ballet stretches can place a lot of pressure on your joints, especially your pelvic joints, and standing on one leg can cause pain in your pelvis.
Yoga, pilates and barre workouts - they're all popular, but are they effective in burning calories? Stephanie Grauer, co-owner of Xtend Barre in Mission Viejo, said barre classes helped her when she was pregnant. When I was pregnant, I needed cardio and couldn't find it anywhere, and this really helped, Grauer said.