Had a great cardio workout last night. I did not think I was going to make it through all of minute 19 having upped the speed on the treadmill to 6.0 as planned. The last 15 seconds seemed like an eternity, and I had to push myself pretty darn hard to make it through, but make it through I did! I'm pretty sure it qualified as a 10. I also made sure my 6s were 6s, and not 5s so that my active recovery was active! Man, I love this way of working out. It feels so much more challenging, and I feel like I'm building my endurance a lot faster. And with all this focus on intensity, and increasing it every minute, 20 minutes flys by! I capped off my cardio workout with 10 more minutes of moderate intensity (pretty darn boring). So I did a total of 30 minutes, 20 of which were high intensity.