Iyengar Yoga, developed by yoga master B.K.S. Iyengar more than 60 years ago, promotes strength, flexibility, endurance, and balance through coordinated breathing and poses that require precise body alignment. The poses are generally held longer than in other styles of yoga. In Iyengar, you slowly move into a pose, hold it for a minute or so, and then rest for a few breaths before stretching into another. Equipment like cushions, blankets, straps, and blocks to help the less flexible also distinguishes Iyengar from other types of yoga. Although Iyengar incorporates the traditional postures, or asanas, that make up the broader category of hatha yoga, the cushions and other props revolutionized yoga by enabling everyone -- even the elderly, sick, and disabled -- to practice. Because of its slow pace, attention to detail, and use of props, Iyengar yoga can be especially good if you're recovering from an injury. Iyengar is still one of the most popular types of yoga taught today.