You say you used to run, so presumably no reason you can't run again... It's old school but have you tried HTFU just get on with it and accept some aches n pains and see how you feel in six weeks.
Yawn amazing another posters only post is to say how wonderful karrimor shoes are.... Amazing how many come on here say they are the best fucking shoes ever and never say anything else except no of course I don't work for them... *yawn*
As above if speed isn't an issue and you cannot survive without your park run do both. But there is no way you will do as good in the second one with having done the park run
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