Rus Greene is correct in catching the distinction ...

"A seven-minute workout can be efficacious," says Glen Cordoza, co-author of Power Speed Endurance: A Skill-Based Approach to Endurance Training, a book detailing Crossfit founder and triathlon coach Brian MacKenzie's revolutionary short, intense approach to training.

http://www.boulderweekly.com/article-11320-rus-greene-is-correct-in-catching-the-distinction-.html