Sheila Stothard is 80 years old, walks everywhere, and can lift two 35lb dumbbells.Phil Mackenzie80-year-old Sheila Stothard never drives and walks everywhere.She shared her tips for staying active and healthy into older age with Business Insider.These include adding walking into your day and eating healthily.At 80, Sheila Stothard can't imagine being unable to run around with her great-grandchildren.Stothard, who lives in Ontario, Canada, has always been active and hasn't slowed down since she turned 80.