That's fascinating, classic. Everything is controlled by the brain one way or another...
I voted never, although I suspect that a lot of my around-the-house physical activity would count as elevating my heart rate. But cardio and I have a longstanding feud, wherein certain activities cause my throat to constrict almost immediately. Someone once referred to it as "exercise asthma." I can swim, and I do the elliptical, because those are smooth motions, but running, aerobics, or any kind of fast-moving sports are completely impossible.
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