Short high intensity cardio?

[Fast Twitch Fiber]

Is it beneficial for cardio fitness? For example, if I swim one lap going full speed to the point that I'm exhausted afterwards, then I rest and do more laps (with rest in between), is that good for increasing cardio fitness? Also, I guess this would be like running sprints. Does it do any good to do short bursts of high intensity training?

 

[Synpax]

You can ask this on the cardio board.