"On the subject of metabolic rate: Every pound of muscle added to the body of an adult female will require an additional 75-100 calories per day just to keep it alive. The average person, through a program of proper strength training can add enough muscle to burn an additional 3500 calories per week (I Ib. of fat=3500 calories). The amount of strength training required to effect such a change is less than one hour per week."
If that was true, every powerlifter would be ripped.
I think a lot of the confusion over the metabolic cost of muscle has to due with the energy used in training to maintain the muscle and the afterburn effect of anerobic training.
It's too bad when writers make mistakes like this. It removes credibility from what would otherwise be a good article. The ACSM newsletters are the same.
The "Superslow" training method itself is flawed so there goes their credibility again. However their view on aerobics is shared by others with more credibility.
Mark Sisson used to be a triathelete and now recommends sprints instead of long duration aerobics. He's the author of this site: http://www.marksdailyapple.com/category/fitness/
Clarence Bass is in incredible shape and his aerobic training is usually tabata rows.
"Long slow running or biking may be a waste of time for people who want to become fit and healthy but have no plans to run a marathon or compete in high-level bicycle racing."
"There is no free lunch, of course. High-intensity intervals are hard."