I have been running with diagnosed PF and heel spurs for over a year. I take advil during flare ups, use the golf ball stretching thing and wear supportive non running shoes. I won't stop running, so there you go. Speed work does worsen it and I love speed work <img alt="" class="inlineimg" src="http://www.kickrunners.com/forum/images/smilies/sad.gif" style="border:0px solid;" title="Sad">