We've got three different aerobic/anaerobic (cardio) training exposures in this week's programming. Each are to be performed twice. The high intensity session uses Zone 5 (out of 5...near readline) for 10 seconds, and then Zone 1 (super easy) for 50 seconds. This makes a 1:5 work to rest ratio for those who are interested.
Here's the challenge. You really have to push yourself to condense and compress output and GO HARD for ten frigging seconds. Then you have to go as easy as possible until it's time to hit it again. There is a tendency among some fitness enthusiasts to just go moderate plus and moderate minus, creating a grey mush of indistinct effort that does not accomplish the training objective. Not us. Get after it.