Earlier quoted context omitted.
Let's go point by point: > strength training 3x a week will with no other exercise will leave the average person with extremely poor cardiovascular fitness. This is actually not true. I wont argue it's going to give you the same level of cardiovascular conditioning as running daily, but it absolutely gives you a baseline of cardiovascular conditioning. Since we are talking about basic fitness, I would still hold to m…
starting strength involves perhaps 30 minutes of active exercise in a week with most time in the gym sent recovering between sets. that is simply not enough to develop any sort of cardiovascular fitness unless you have an abnormally strong response to training. your links in support of the injury prevention and mass building benefits refer to startingstrength.com and Practical Programming. That book is health cult li…
I have to disagree with you on the machines though. From what I've read, they tend to train large muscle groups but fail to build up stabilizer muscles, which can cause some nasty problems if you keep at it for a long time. A good friend of mine worked out exclusively on machines for a while and wound up having to work (as a developer) in wrist braces because the muscles in his arms were all out of whack. He thought he'd gotten carpal tunnel syndrome or something similar, but his physiotherapist did a quick exam and asked him if he worked out on machines X or Y. He answered in the affirmative, and she told him to stop immediately and start stretching and do some bodyweight stuff.
Bodyweight or barbell exercises won't lead you down that path, but machines can and do cause problems. Be careful!