Injured Nanna needs to lose weight!

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Hi, just joined 2 days ago, so still browsing the site and found you guys!Am almost 60 and unjured back 3 years ago.Have had 3 operations, the latest 6 months agao,,,,....spinal fusion....but still in terrible pain.Mobility very limitted to walking short distances.Have gained weight as used to being active (reg. nurse so always running)Need help with excersise tips within my limits, and social interaction to keep me on track. Only 155cms tall, need to lose at least 9 kgs.Live in Sydney Australia.....anyone from Oz here?Meds also cause weight gain. Any help appreciated!!!!Have 5 lovely grandkids that I cant pick up etc due to surgery, so need to lose weight to keep up with them and be able to return to work....well....guess that part is not weight related.Hope i am posting this on the right site!!.....have a good day everyone and to all the Aussies and NZ fold....enjoy ANZAC day....lovely and sunny here.....cheers Heather