Chaturanga dandasana is a technique to strengthen arms, chest and core. You can do it static or dynamic (yogic push ups).
Chaturanga means "four members" and danda means "stick". We remain as a horizontal stick supported at 4 points (2 hands and 2 feet). It's a hard stance, but gives great strength.
TECHNIQUE
We get in horizontal, as if we were to do a push up, with the toes flat on the floor and hands at shoulder width.
Inhale and slowly...