Hi. I'm an ultra trail runner. I need to get as much vertical ascent under my belt as possible. I can get out into the Chiltern Hills at the weekends but during the week there just isn't the time so a treadmill is the answer (between other training). The problem is that most treadmills don't actually record elevation as you're running or even at the end of the run. They show gradient and horizontal distance but usually not average gradient over the entire run so that you can calculate it yourself. Does anyone know of a treadmill that does indeed show vertical gain in metres either while you're running or at the end of the run with all the other run stats?