Thanks again everyone. Mwglow - I expect there is a lot of truth in what you say. However, my son, who also runs and swims, is able to push himself in running training even on his own - I thought his running training would really suffer in lockdown, but he’s proved me wrong. So partly based on that, I’d assumed he could also push himself on the turbo. Iamholland - sounds familiar! My son was beating me up hills from around the age of 8 (my power to weight is not as high as yours), and gradually has overhauled me on the flat. I could still beat him going down a hill - if it weren’t for my total lack of bottle… Like you, I’d like to avoid getting an electric bike for now, although I did hire one on holiday last summer so we could ride the Tourmalet together - and he still outsprinted me in the last 250m! Empiricalcycling - thanks very much for the offer - I’ll DM you shortly.