Try this simple way to beat stress and help relieve symptoms of anxiety and depression.

If you're into yoga, there's a practice you might already be doing that's been shown to benefit people who suffer from mental illness.

A recent study from the University of Pennsylvania found yogic breathing, a practice known as Sudarshan Kriya, helped "alleviate severe depression in people who did not fully respond to antidepressant treatments," and lessened symptoms, such as stress, associated with the mental illness.

Karusia Wroblewski, who teaches yogic breathing in her yoga classes at Toronto's Yogaspace, says the technique has significantly improved the lives of both herself and her students. "They have more energy and their outlook on life improves," she says. "One student reported being able to cut back on anxiety medications. I just received a thank-you letter from a student who had suffered from deep depression, panic, anxiety attacks and insomnia."

Yogic breathing is more than just slowed inhalation and exhalation—it requires a conscious effort in recognizing and regulating our breathing patterns by adjusting the speed, rhythm and volume of each breath. According to Wroblewski, we often neglect the importance of breathing because it's a natural process. She says injuries, stress and even strong emotions can affect "healthy breathing."

The basics: Inhale gently through your nose—imagine a balloon inside your body slowly inflating. Exhale through your mouth while the air escapes the balloon. Control your breathing; your breaths in and out should be smooth. While you're breathing, try not to dwell on your thoughts—just let them come and go, as if they were on a cloud floating by. Repeat the breaths three to four times, then close your mouth while continuing to breathe through your nose.