Originally posted by: Bateluer
Wonder what the heart looks like in someone who only lifts weights and have never done any dedicated cardio.
I don't think this fitness guru is much of a guru myself. 'Cardio Kills' he says, sounds like a dumbass. A healthy heart is essential to a healthy life.
An effective exercise routine can not include any weight lifting at all and still be very effective at losing weight and maintaining a healthy body. As others have said, the diet plays a critical role in any exercise routine. The ideal diet for a runner is going to be different than the ideal diet for a hardcore weightlifter.
Finally, I just want to add my personal opinion.

Running is just much more fun than weight lifting. You get to go outside, get some sunlight, see interesting places, and meet interesting other people who run. In a big gym, you typically see similar types of people (weightlifting pinheads with larger biceps than brains), you get little sunlight, no traveling, etc. And how many girls are you going to meet lifting weights in the gym compared to how many you can meet if you're out running in public areas? Lot more female runners and cyclists than female weight lifters.