Running........

I've always said I don't run, I have no interest in running, Running is bad for your joints.  So why on earth am I thinking about taking up running????? Something must be wrong w/ my brain.  I keep on looking up 5K's and Disneyland just had there 1/2 marathon & they have a 10K I want to participate in.   But I don't run!  I have exercise induced asthma.  I can't run, can I?? I wish I would have downloaded the couch to 5K app when we first signed up for our Warrior Dash. I am just a little worried about the running. I hopefully will have lots of pics and I pray I come back & think that was hard but do able. I so worried about holding everyone back because I am so NOT in shape & can't run.