Katy Bowman was my first introduction to Foot exercises. I had been watching her program and Egoscue's for which posture/movement certification I would take. Katy never opened up certification again BUT she expanded into books, podcasts, blogs, videos and lots of online info.
My favorite thing of Katy's was her
CALF STRETCH... but she is great at lots of functional movement. Its scientific but also very natural, paleo type movement. It brings embodiment into it by constantly bringing you back to FEELING into the movement. I love this curiosity.