Fantastic Friday treadmill

My training partner canceled for this morning, so I slept much later and then went for a short treadmill workout at the Kings Express gym right nearby - it was fantastic. I just did one of Gayle Bernhardt's basic ones, 10 mins. warmup plus 6 x (4 mins. zone 3, 1 min. recovery); but she has a ton of other more complex ones in the back of that book, I need to start expanding my repertoire...