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I guess my question here is: what exercise/s are you referring to with "majority of our aerobic exercise"?

what the article mentioned - Running, swimming, playing soccer and other similar ones such as cycling, kayaking, you name it

Soccer is more like HIIT if you think about it (and actually play it with a bit of heart) - few +-100% sprints and a lot of walking/slow running to fill the rest.

In team sports in general you are not so much in control of intensity, the game/other players are. Other sports you mention are more like that.

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