There are very many types of cardio: running, swimming, aerobics, etc. But if you're not the kind to throw on earphones and take off for a half hour, you could put together some cardio moves and still break a sweat. One of these types of moves is the jumping jack.
All you need to do is continuously jump while opening your legs and raising your arms, and closing your legs and dropping your arms. Sound confusing? Watch my video below to see a full illustration. If you're not breathing hard after a few minutes, you're not done :)
Cheers Eights & Weights!