I began a jogging frenzy, then through google I found this article, "A Case Against Cardio": http://www.marksdailyapple.com/case-against-cardio/
For those haven't read it, the summary is:
1) Long-duration, low-intensity activity(e.g. walking or hiking
2) Short-duration, high intensity sprints
So if I walk around a lot every day, and then 3 days a week I perform a sprinting workout... am I really getting any "cardio"? Cardio meaning cardiovascular training: making the hearth healthier, lowering my resting heart rate, increasing my VO2 max... all that good stuff.
Right now my resting heart rate is about 70-80. I get winded from a brisk walk. My heart rate spikes uncomfortably after a heavy weight-lifting set, so much that its lengthening my rest between sets moreso than if I was just waiting on muscle recovery. I would really love to strengthen my heart, but does simple walking and sprinting accomplish this goal? I had always been under the impression that traditional cardio: a 20-30 minute run at 70-85% MHR, was necessary to train the heart. Then I come on this website and find out that's bad for me.