The practice of asanas forms part of the very ancient science of Hathayoga and consists of a number of poses which, apart from their yogic or psychological value, promote health, organic vigour and physical fitness.
The following track is a recording of Pranab Bhattacharya's Asana class, which he used to conduct three times a week on the covered terrace of the Ashram Playground. You can use it to follow along in your own asana sessions.