Taken from my own perspective. Not advice.
1. Sex.
It doesn't have to be but...2. Cardio you see when watching the Olympics
Certainly the easiest kind.4. Swimming
Depending on duration and intensity6. Calisthenics
Ah, the memories of gym class7. Aerobics
Lots of different styles and levels of intensity in this broad category.8. K9 Agility competition
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