I never had to touch a weight working on the railway mate, from 18 to 30+ I put some right graft in doing track work. For the last ten years though I did lineside civils which is much easier, I'm now back on the tracks doing maintenance, not the pure graft day in and day out like the past but putting some decent shifts in more regular now. But as you know, when you start pushing 40 you're not quite the same as you were in your twenties, it pays to start exercising mate even at your age.