Sharing this post (by Eric Velazquez, NSCA-CSCS) because it’s a great little workout when you feel like you need cardio, and you don’t have (or want!) a machine!
And yes…there is plenty you CAN do without having to be indoors, feeling like an oversized hamster. HIIT (high intensity interval training) is a great way to get your heart rate up, and the metabolism burning. I’d personally take running with a log over the treadmill myself!