Hi Melba, you'll be toasty in no time - sorry bad pun.
Running is great but hard on the knees. i recommend not falling into the trap most get sucked into, it's hard so make it intensive. Don't walk for miles because running is hard, better to run hard for a short distance. If you can find some hills - work as hard as you can and impove every day.
Yours,
Chris.
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