The AM classs: Designed to energize your entire day. Callan leads you through a comprehensive 20 minutes to strengthen and beautify your entire body. From wake-up stretches to target toning of specific muscle groups, it will make starting your day and exciting experience. The PM class: This fully relaxing, highly effective 20 minutes evening workout utilizes unique deep-muscle Callanetics exercises in a routine that reduces stress while working to rejuvenate and contour all your body's muscles.