@Darwin
If you can keep up running longer, doesn’t that mean jumping rope takes more effort and therefore burns more calories?
Personally I don’t expect there to be a major difference in the results you reap, as long as you keep at it until you’ve had enough. If either is less efficient, you’ll last somewhat longer doing that one. It’s only interesting which burns more calories if you’re short on time every day.
And personally I would choose running, because it’s more interesting and a more useful skill to develop.
By the way, extreme sports tend to be dangerous… why not try regular sports instead? :)
This coming from someone who has been practising to learn Parkour. I guess I don’t take all my own advice.