Our Himalayan sadhus (the real ones) who are supposed to live really long, many will claim meeting someone who was 120 / 150 years old, etc., can lower their heart rate to 3 to 4 beats per minute (it’s been documented and proved in labs). So in just 3 or 4 beats they pump out 5L; don’t even bother calculating how high their stroke volume is and how big and strong the heart muscle is!
