Powerhouse it is. Leave it up to Rachel to activate your core from the inside out and improve posture and strength.

Props: a block (or alternatively a book) and a ball (or alternatively a cushion) (it's also possible to do this class without the props).
Level: all levels.
Music*: https://open.spotify.com/playlist/2U2ojTWOrx3DzOTTlkN9Jm
*open on a separate device or in your Spotify app