Boulder-based exercises of yesteryear help build broadsword-wielding strength, but they do little for shimmying into a cramped elevator or scurrying up palm trees at the mall. Founded by Pilates guru extraordinaire Jennifer Reich, Center Strength helps tone bodies into limber life-mobiles. Inside Center Strength’s cozy, vividly colored studio, a trained staff of professionals helps shape body putty into core-strengthened stacks of lean muscle. Center Strength’s selection of mat Pilates, yoga, and Tai Chi classes will help strengthen the body as well as the mind. Figure-trimming Pilates classes are offered Tuesdays at 4 p.m., Wednesdays at 12 p.m., Thursdays at 7 a.m., and Saturdays at 9 a.m. Find strength and calm in practiced breathing at yoga classes on Tuesdays at 7 p.m. and Saturdays at 10 a.m. or Tai Chi classes on Mondays at 7 p.m. Your five classes may be used interchangeably, just like the gears on a fancy tractor.