One of my favorite classes I attend at my Health Club is an interval class. Our instructor, Halli is fantastic. The format she uses is called Tabata training. You do a series of 4 different exercises for 20 seconds and rest for 10 seconds. And then another series. It is an intense hour! She is great at showing you how to adapt the exercise to work for the individual. Here is what I noticed recently as I was traveling and staying at a hotel. The treadmills were all occupi