It is an excellent thread i have learned manythings since i am facing similar cases!!! This has happend when i gone through syptoplasti opearation for my nose during the operation my heart beat went very low and they gave me three shocks going up to 360 jouls. When i wake up i saw the heart doctor and he told me that i have Aterial Febrillation which is a type of arrythmia honestly what i feel sometimes is that my heart beat is stronger and faster sometimes I feel like its going slower... So far i am spearfishing but not being able to hold enough my breath beacuse of my lungs since as was reported by doctor i am getting like 50% of them due to Ex heavy smoking!!! Sometimes while working out at gym or aerobics i am feeling fatigue... but the weard in this thing is that i went to 4 other doctors and they told me that i have nothing at all in my heart!!! it was regular...
It is kinda confusing but everything is fine and going on...
I find that some aerobics don't seem to suit me and my breathing pattern is all over, although I don't understand it. I tend to stick to an aerobic stepper now, manual step...cycling can cause a problem, especially in high winds, but jogging is definitely out, besides the knee won't take it...but for some reason, I can step at a high pace, but try running as in across a distance, and the breathing just goes haywire...maybe the apnea training might help in this, or I was just not using the correct breathing technique when doing jogging anyway, since I've recently found out that it should be similar to when walking; it could even have been that I was over-breathing, nothing would surprise me. :head