Performing puraka stimulates the body, enlarges the chest cavity, fills the lungs with air and moves the diaphragm down. It is believed that beginners should first practice puraka and recaka with a 1:2 duration ratio before moving on to practice kumbhaka.
At the end of a proper puraka, the lungs should be filled and expanded completely, but it should still be a slow and controlled act; the time taken to perform puraka should remain consistent throughout repetitions. If a practitioner has to pause one or more times during the process of a single puraka, the process might be called a broken puraka.
Puraka and the process of yogic breathing is a core skill for any yoga practitioner. Mastering the puraka-kumbhaka-recaka cycle not only aids in meditation and pranayama exercises, it also helps the practitioner surrender to asanas during their physical practice and can serve as a means of measuring the duration of poses.