[stouset]

> Those are not necessarily examples of lifting.

They are, and this is trivially demonstrable by literally just trying it on a bike. Seriously. Go put a road bike in the highest gear and try to get up to speed from a standstill. Not only will you be pulling up on the rear pedal, but you’ll be using your arms to try and wrench the handlebars off the stem too.

Go climb a steep hill. Same thing occurs. It’s not like this is subtle. The contribution of your rear leg very clearly contracting will be impossible to miss.