The Solfeggio Frequencies are heavily tied to the art of Yoga. Each frequency is related to a Chakra. While there are no specific postures that you “need” to achieve your sound healing goals, the body and mind are highly interconnected, and active yoga might help you in your journey.
Each Chakra is associated with a body part, and each Solfeggio Frequency is also associated with a Chakra! So interconnecting the two is never a bad idea.
For example, the Root Chakra is located at the bass of the spine, and 174 Hz, 285 Hz, and 396 Hz are also associated with the Root Chakra. Therefore if you are listening to those frequencies, try out the mountain pose while listening to those frequencies!
That is just one example, each Chakra has a location in the body part that yoga and positioning can affect.