Hi both. I was like your daughter at school sue until I turned 40 and a switch flicked in my head and I decided time to get off the couch - I took up running and at first could not run around the block, but within the first year was running 10 kms at under 60 minutes (on a good day, mostly at around 60 minutes!).
I loved running, ran for many years, furthest I ever did was a half marathon. I think I now have "muscle memory" because although I no longer run, I can outwalk most people once I get into the zone. I still have "running dreams".
As for jiggly bits, that what sports bras are for! 