Many yogis think it is never good to round their low back in yoga.
Wrong. We need to be able to round our low back in many yoga postures.
This video shows you how to tell if your abdominals are not strong enough or if your low back muscles are too tight to enable you to round your low back.
To do Vinyasas to and from sitting, Balāsana, Kurmāsana, Gharba Pindāsana or any Leg-Behind-Head postures, this abdominal support strength and muscle length in the low back is vital!
For video please go to https://youtu.be/q2aWumoZrYA