Bandhas are techniques in yoga that involve tightening or locking parts of the body. There are four main types of bandhas - Jalandhara, Uddiyana, Moola, and Maha. Bandhas are discussed along with mudras in ancient texts and are incorporated into pranayama practices. Attending the 200-hour teacher training program at the Karuna Yoga Vidya Peetham center in Bangalore, India provides the opportunity to learn about bandhas and how mastering pranayama and mudra practices through them can awaken psychic abilities and prepare students for advanced yoga.