Even from when i was young i fealth i can control something related to the heart.i tried exercicing that feeling i had and increase what i fealth.I later realized that i can control my heartbeat in a way that many people where shocked when i showed them.Standing totaly motionless and without controling my breath or thinking about stuff wich was mentioned earlier by a member(sex, sport ,violence) i can almoust double my hart rate in just a few seconds(5sec) .If someone reads this and thinks that this is something interesting and i could take some more study tests or use this for something productive please contact me.thank's to all