Utkatasana and Virabhadrasana A&B Health Benefits

Utkatasana

Literally translated it is "Fierce Pose", but it is more well known as "Chair Pose". The posture is called Chair pose because it is just like sitting in an imaginary chair. You need to balance yourself without the use of chair. This pose enables the strength in your body and it helps in stimulation of your heart and diaphragm. By practicing this posture you will improve all the standing postures as you will get more stability and strength, especially in your legs.

Strengthens the ankles, thighs, calves, and spine
Stretches shoulders and chest
Stimulates the abdominal organs, diaphragm, and heart
It can also improve flat feet

Virabhadrasana A&B

There are three warrior poses all together in yoga, but in Ashtanga primary series you practice only Warrior A and B. The posture Virabhadrasana is named after Veerabhadra, a fierce warrior, an incarnation of Lord Shiva.
Warrior A and B both strengthen arms, shoulders, thighs and back muscles. This posture is one of the most graceful yoga postures and it adds grace to one's yoga practice.

Strengthens your shoulders, arms, legs, ankles and back
Opens your hips, chest and lungs
Strengthens and stretches the thighs, calves, and ankles
Improves focus, balance and stability
Encourages good circulation and respiration
Energises the entire body
Stimulates abdominal organs
It is beneficial for those with desk-bound jobs
Extremely beneficial in case of frozen shoulders
Releases stress in the shoulders very effectively in a short span of time
Strengthens and stretches the legs and ankles
Stretches the groins, chest and lungs, shoulders
It is therapeutic for flat feel and osteoporosis