Welcome to the forum and well done on your decision.
As we age we have to accept that we are unlikely to be able to perform at the same level as in the past and trying to recreate those feats is highly likely to result in injury. That doesn't mean that you cannot rebuild your running fitness and ability by following a gently progressive training plan, such as C25K.
I think many of us can say “we used to do ... and now we can’t” Unfortunately that comes with age 😪
I try not to look back at what I could do, I try to look forward at what I hope I will do 👍🏻 And the more I do, the more my goal posts are moving 🙈 (I wanted to do 5k when I started, now I’m looking at 10k after completion because I have the running bug)
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