Hang from the rings, tuck your knees and pull yourself into an inverted position and extend your legs, to bring position yourself in an vertical inverted position.. Arms should be straight, start with your shoulders depressed (away from your ears)
Pull the rings downward and elevate your scapula (shrug your shoulders up to your ears), squeeze at the top. Return to the start and repeat for repetitions.
Maintain a straight vertical line, and total body tension throughout. The only movement should be coming from the shoulders.