He has had diabetes for about 15 yrs and is in early 70s. He wants to be active but it's getting harder. 30min walk from town and he is almost crawling in front door. He then has to eat almost immediately. He is struggling with almost any activity with his diet. I suggested he speak to the diabetes nurse for advice but get the impression from my mother that they aren't that knowledgable. They eat very healthily so Any suggestions?