Answer this question to the best of your ability:
Can you explain the concept of Yoga Nidra and how it differs from mindfulness and concentration-based meditation?
Yoga Nidra, which means "yogic sleep," is a form of guided meditation that's practiced lying down with the body relaxed. It's a form of deep relaxation where the practitioner is led through stages of awareness to progressively release tension and cultivate a state of complete relaxation. While it shares similarities with mindfulness in its focus on being present, Yoga Nidra differs in that it focuses more on deep relaxation and surrender rather than observation or concentration. Unlike concentration-based meditation which involves focusing on a singular point, Yoga Nidra is a guided practice that leads the practitioner through various stages of awareness and relaxation.