Hauling the baby in a trailer

TRHuston

Hey all! So I have been literally getting back in the saddle this spring and since my son is now big/strong enough, we have been taking many long bike rides with me pulling him in the Burley. I am bummed that there isn't a cardio exercise listed in tracking for pulling a trailer behind a bike. Anyone have any insight as to how I would log this more accurately than saying I'm riding faster than I am? Thanks and happy trails!