STRONG CORE. SAFE WORKOUT. CORE HAVN. Our Renton pilates studio offers XFormer classes, personal training, or small group instruction. Achieve your strength training and fitness goals with our highly trained staff in a clean, safe pilates center conveniently located on the shores of Lake Washington, near the Landing. We'll lead you through a full body workout to develop muscular strength and muscular endurance, focused around the 3 S’s that are our CORE values: STRONG. SAFE. SUCCESSFUL. Reach your Strength goals, using Safe form and technique, and be Successful reaching them!