Cardio is a shorthand term for aerobic exercise. Aerobic exercise is comprised of activities that tend to improve the body's utilization of oxygen.

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When doing HIIT, how long should your intervals be?

I currently do a 1:2 ratio of high to low intensity. My high intensity interval lasts 60 seconds, and my low intensity one lasts 120 seconds. I do this on either the elliptical or the heavy bag (I'm ...
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Cardio and muscle growth

I have spent 7 years doing practically no exercise at all and eating all the crap I wanted. Weird thing is that during all this time I have been pretty muscular. Recently I started doing some ...
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Is there any scientific info about effects of air pollution during exercise?

In my city, some advocacy groups are raising awareness about the dangers of vehicle exhaust nearby parks and other places where people exercise. However, we couldn't get to "the heart" of the body of ...
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Is Hypercapnia (high CO2 in the blood) Normal In Distance Runners?

I have been running 20 miles a week (three hour long runs, monday, thursday, and saturday) for a long long time. Last year in my annual physical I had a venous blood carbon dioxide level of 29. This ...
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Optimum amount of aerobic exercise to induce Angiogenesis for bodybuilding purposes?

So I have always noticed that my endurance-oriented friends have always been more vascular than me at similar bodyfat levels. I stumbled upon the term, Angiogenesis, in another post on this site so I ...