This workout consists of 3 sets of 30-20-10 second build ups for a total duration of 5 minutes each set. The simplest way to approach this ride is :30 seconds at a basic endurance level, followed by :20 seconds taking it up a notch to a tempo level, and straight in to a :10 second mini-burst. Think of this as a "Peek-a-Boo". A short reminder of "Mom, I'm here do you see me".