How to get a REALLY deep back arch?

What I Mean:

I’m talking about doing puppy pose with my upper body as much on the ground as possible or having my back hang really deep in cow pose. Basically, I want that extreme spinal extension and a super flexible, open back.

The Problem:

🚫 My back is super inflexible and tends to round a lot instead of arching. ⚡ I kind of want to reach the opposite—a deep, effortless arch!

Looking for:

🔹 YouTube video recommendations 🔹 Exercises/stretches to improve spinal extension 🔹 Any mobility drills or tips that helped you personally

Would love to hear your advice! Thanks in advance! 🙏

What I Mean:

I’m talking about doing puppy pose with my upper body as much on the ground as possible or having my back hang really deep in cow pose. Basically, I want that extreme spinal extension and a super flexible, open back.

The Problem:

🚫 My back is super inflexible and tends to round a lot instead of arching. ⚡ I kind of want to reach the opposite—a deep, effortless arch!

Looking for:

🔹 YouTube video recommendations 🔹 Exercises/stretches to improve spinal extension 🔹 Any mobility drills or tips that helped you personally

Would love to hear your advice! Thanks in advance! 🙏