Hey man, I know exactly how u feel because I also had planta faciitis. I had for abour a year and a half... The only sure way to get better is by resting like hell man, avoid being on ur feet tooo longgg and massage and strech the feet and a muscle called tibialis anterior on the front lateral side of ur leg, basically on the right side or left side depending on which leg(shin) .. It took me 3 months to get over it... sacrifice training time man trust me its worth it cause now i havent gotten any pain since march...

Bow out with respect from a TKD/BAGUA MARTIALIST