Personal Pilates RI teaches a system of exercising that connects the mind, body and spirit, creating a body that is toned but not bulky, strong in the core, and flexible. The six key principles of Pilates are: centering (working the core of the body), concentration (exercises require focused concentration), control (all movements are firmly controlled), precision (movements are of quality, not quantity), breath (sending oxygen to muscles) and flow (movements are performed with vigorous dynamics.)