[QUOTE=Trunk]
…
But, it’s eventually going to boil down to a place where all you’re saying is “the same amount of exertion burns the same amount of calories”.
What does it all come down to physiologically? Calories are a unit of work. One way to measure “work” in the body is heartrate. If I get my HR to 150 on a cycle or on a Nordic track, I’m doing the same amount of work. I’m not sure what you’re trying to say beyond that. Of course you tone a different set of muscles, and that has it’s own advantages, but i don’t know why anyone would ball one a “more efficient form of cardio”. I’m not even sure that phrasing makes sense.
…
[/QUOTE]
A bit of a nit, but this is not quite true. I asked a former head coach for USA Triathlon once why it was so much harder to get my heart rate up when swimming or biking than when running. He told me there were a few reasons. First, when you swim, you are horizontal, which lowers your heart rate relative to the vertical position of running. The biking position is between the two. Another factor is that you can only push certain muscle groups so hard. Being a runner, I have trouble generating the leg power to get my heart rate cranked up. Almost anyone can run hard enough to get their heart rate up. Swimming, of course, uses the upper body much more than either of the other two. I’ve also noticed that most pools are kept at a temperature that prevents you from overheating, which means your body does much less work to cool you than when running. Again, biking is between the two, because of the much higher windspeed.
The meaning I would apply to “efficient form of cardio” is number of calories per unit time. In which case, it is hard to beat running or cross country skiing.
Nava, where do you live? You are sweating, you just may not notice it. Believe it or not, you can even dehydrate while swimming, because you do sweat and you can’t tell. Likewise, here in CO I can be sweating profusely, but be unaware of it because it evaporates quickly.
The single most important thing is to find a cardio sport, preferably a few of them, that you like, and do it. The list is endless: stair machines, cycling, yoga, basketball, volleyball, running, walking fast, fencing, tennis, elliptical trainers, even some forms of weightlifting. The next thing is to get a dog or friend to do it with. (It is hard to beat a dog as a running buddy, at least if you can get out into nature. They truly live for it.) If you are letting someone down by skipping, you won’t. Plus, if you have someone to talk to, the time flies by.