It seems that whenever I start really 'working out' and getting my heart rate up to about 140 or so that I start to feel sick, and nauseous and then my vision starts to black out. If I push it a little more my body will start to go numb and my extremities will tingle as well as my chest will get really tight as well as my breathing will become tough, not to mention I feel like puking worse then when I have the flu. I will also have no energy to walk hardly, as well as my vision is usually blacking out by this point. The effects are usually felt days afterwards through my chest feeling really tight and me feeling 'weaker' then usual. Oh another thing, when the heart/cardio episode happens usually I will lose hearing in either one, or both ears, and when it does start to return it sounds like the 'snow' channel on TV or a light test tone pattern sound.
Does anyone know if this is normal and perhaps my cardio is just really out of shape? Or perhaps I have a condition?
Does anyone know if this is normal and perhaps my cardio is just really out of shape? Or perhaps I have a condition?

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