This yoga dome is great for strengthening core muscles. It also helps to improve balance.
Body Sculpture Fitness Resistance Loops - Click to select resistance
Gaiam Performance Flatband Loop - Maximum Strength (5-7kg)
Gaiam Performance Flatband Loop - Mobility & Movement (1-3kg)
Buffalo Sports Cast Iron Kettlebells 4kg-20kg - Click to Select Weight
Bodyworx Adjustable Resistance Tubes with Handle - Set of 3