 I'm going to go out for a trundle because I'm kind of nervous about this now. I think it's a ticking time bomb, but luckily, if you get your steps in, you get your walking in, in my case, trundling this morning. That's a mixture of so-called jogging. Trundling is anything between 10 and 15 minutes a mile. Trying to explain it to an out-of-town friend yesterday. Running is between 8 and 10 minutes a mile.