[Lio]

I haven't seen anyone speaking up for treadmills here so I guess I'm going to be the only one to do so.

I don't think treadmills are silly at all.

If you live somewhere flat and you want to train to run up mountains when you go on holiday a treadmill is a useful tool. You don't get the thinning of the air but they can give you access to long steep gradients you wouldn't otherwise be able to train against.

As a cyclist, I use a smart trainer and Zwift for much the same sort of training.