breathing exercises pleas help me

[darkgluegun]

ok im not exactly healthy but im not fat and im 13 and i dont have any health problem im aware of, i saw on the JOS that the breathing exercises are important however they hurt me i do a 6 second inhale and hold for 4 and on the exhale i have to go really quick or my heart speeds up and my lungs start to hurt is this spiritual or medical and is there anything i can do about it