Try heel drops, with a slow gradual increase in added weight. http://www.runningwritings.com/2011/09/injury-series-flat-eccentric-heel-drops.html?m=1
12 weeks.... Better get to it.
@pifko started
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Try heel drops, with a slow gradual increase in added weight.
http://www.runningwritings.com/2011/09/injury-series-flat-eccentric-heel-drops.html?m=1