My husband has Vascular dementia, he is a walker. He went into care this year. I couldn't keep him safe at home, he would wonder. He is 91 yrs old now, I was his carer for 12 yes, he has always been very fit, enjoyed walking and cycling, we both did. If u can find someone to walk with her it may help. I couldn't find anyone in my area to walk with my husband. I walked with him, we would come home, be in about 20 minutes, he would won't to go again, exhausting. Hope you can get help. All the best to you.