Ring in and out
Also known as single arm extensions. Bring the rings close to the ground and get into a push up position with your hands on the rings. It’s alright to keep your feet wide to counterbalance the movement.
Go to the bottom of the push up position and from there extend one arm directly out, until the elbow is completely extended, and bring it back in. Alternate between arms.
Ensure the rings are hanging free at all times (don’t lean into them) as this provides support and keep your hips and shoulders square.
To scale this gymnastics exercise walk your feet closer to the hanging rings, this will take some of your weight away.