Another good place to start is with a discipline called Iyengar yoga, which emphasizes controlled body placement and alignment. Participants use aids like blocks, straps and cushions to help with poses, making it accessible to people of various fitness levels. Classes are generally slow since instructors pay close attention to each student to ensure that poses are being done properly. Because props are used, students set the pace and level of difficulty they are most comfortable with and can challenge themselves to harder moves when they feel comfortable. There are more than 200 poses used in Iyengar, which are performed sequentially with one pose moving right into the next. Each pose is held for about a minute, helping to improve endurance and breath control.