Alfie. I have always been fairly active. I have always had dogs. I used to do rescue work for German Shepherd Rescue and kept a couple of fosters, with issues!!!! In now have two rescues, again each with a few issues. I find a great tool in modifying unwanted behaviour is to drain a dogs energy....so I have always walked at least an hour, in remote places where the dogs can be off lead , most days of life. The two shepherds used to go hill climbing with me. I have done a couple of Munros and Corbetts. But, I have to say it is a lot more enjoyable now I am not hauling so much excess weight along with me.
My last works health check....they told me I had the lung capacity of a 26 year male...lol
I'm sure it's years of huffing and puffing with my walking and being so heavy