Correct form is essential in order to prevent injuries and to absorb the full benefits of correct movement.
These are some ques on how to do a proper Chaturanga Dandasana + Upward Facing Dog:
Get into a strong plank hands shoulder width apart, push the your body weight down from the ground through your arms to your shoulders, fingers spread out wide, push-up to Chaturanga- be sure your elbows are right up against your sides, do not let your elbows go past your back instead line it up to be parallel with your back. Now inhale, push down to Upward Facing Dog. Legs are super straight and energized, shoulders strong, fingers super wide, look up to the sky. Breathe!
These are upper body strengthening movements which open up your chest, help relieve lower back pain, and promotes better breathing.