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I suspect that the normal limitations of my body were overridden by the amphetamine and I pushed to the limit which mechanically is 240bpm because the heart needs 250ms to reset. But yeah, 180 is where I would say pain begins.
I suspect that the normal limitations of my body were overridden by the amphetamine and I pushed to the limit which mechanically is 240bpm because the heart needs 250ms to reset. But yeah, 180 is where I would say pain begins.