I like Elizabeth’s answer of HRV because it’s supported by the literature, quantifiable, and pretty easy to measure with an external tools. In your case, I think if you’re asking questions like “what muscles are tense?” or “How do I feel right now?” and not getting a response, it may be simply lack of practice in certain types of awareness.
Mindfulness based meditation around body, breath, and mind awareness are deliberate practice towards being able to answer those questions.
I like Elizabeth’s answer of HRV because it’s supported by the literature, quantifiable, and pretty easy to measure with an external tools. In your case, I think if you’re asking questions like “what muscles are tense?” or “How do I feel right now?” and not getting a response, it may be simply lack of practice in certain types of awareness.
Mindfulness based meditation around body, breath, and mind awareness are deliberate practice towards being able to answer those questions.