This yoga retreat in Cummins Station is the perfect getaway from the work day.. In Short The Yoga Source is convenient for downtown workers; classes run throughout the day and run an hour and 15 minutes, making it a great escape from the office hustle and bustle. Various types of yoga are practiced: Iyengar focuses on posture and creates a keen sense of body awareness. Vinyasa blends postures with synchronized breathing and smooth movements. Ashtanga is a dynamic, precise and progressive sequencing of postures accompanied by deep breathing.