This posture firms the abdominal wall and upper thighs, tightens upper arms, hips, and buttocks. It increases the size and elasticity of the rib cage and the lungs, improves the flexibility and strength of the lower spine and most of the body’s muscles.
Three Tips for Full Locust:
The stronger you can make your arms and legs, the lighter the body actually feels as you lift up off the floor. Also try squeezing your fingers together to lengthen and strengthen the arms even more.
This posture is the perfect asana to practice the 80/20 breathing exercise. Exhale all of the air out of your lungs as you are lying flat on the floor and inhale fully as you lift your body up off the floor. When you reach your maximum, exhale 20% of air out of lungs and then inhale as you lift up a little higher. Try this one or two more times until you reach your full expression.
Think about lengthening the crown of your head up towards the ceiling while lifting your chest up. Many students tend to drop their head back too far which inhibits their ability to left up higher and open the chest up.