It helps to heal and keeps you from running (6)
I believe the answer is:
stitch
I believe this is a double definition.
'it helps to heal' is the first definition.
'keeps you from running' is the second definition.
'and' acts as a link.
(Other definitions for stitch that I've seen before include "Sudden pain in side after exercise" , "herringbone?" , "something seen in the needlework class" , "A result of running" , "Darn" .)