The Mobile Interval Training Timer lets you do what you really want to do: Focus on your workout, not your watch This timer has some great features: You can preset several different workouts. For each one, you set the delay time, workout time, rest time, and maximum number of rounds. So there's no need to re-set the timer for each workout. In fact, it comes with six presets included, which you can completely customize. You can set the delay time, workout time, and rest time to any setting from 1 second to 99 minutes, 59 seconds. You can set the maximum number of rounds to between 1 and 99. It's easy to read the big numbers. This is great if you need to set your phone at a distance and would like to see it while you work out. You can set it to vibrate or choose one of four different sounds: Gong, Chinese gong, Tingsha, or Beep. No need to remember to bring anything to else to the gym - your cell phone is always with you. Even better... You Can Add More than One Interval to One Workout For example, you could set one workout as follows: 5-minute workout, 2-minute rest; 5-minute workout, 2-minute rest; 8-minute workout, 4-minute rest; 8-minute workout, 4-minute rest; 6-minute workout, 3-minute rest. This is especially good for high-intensity interval training (HIIT). Running It's also helpful if you run each morning. You'll want to split your run into 3 phases: warm up, usual run and cool down. Running too fast immediately after waking up is bad for your heart. Slowing your pace during the cool down protects your heart and muscles. MITT let's you time the perfect morning run. Rope Skipping I have a couple of reasons for needing multiple intervals. For instance, my first exercise in the boxing gym is rope skipping. Usually it lasts 10 to 20 minutes and consists of two phases: The first phase is warming up. At this phase I switch long, normal intensity intervals with short, high intensity intervals. For example, 3 minutes for normal intensity, 15 seconds for high intensity. Warming up is very important, to help prevent muscle kinks or sprained ligaments. The first phase lasts for 3 rounds. After that I start the second phase. Here normal intensity intervals are much shorter, while high intensity intervals are the same. I need the second phase to start sweating. If my timer can only time one set of intervals, I'll need to stop jumping and reset the timer. Yoga I also use several intervals for yoga. Yoga practice consists of changing asanas, or positions. I hold each asana for different length of time, varying from 30 seconds to 2 minutes. I have several pre-programmed presets, which consists of several asanas. I don't like to think about time when I'm doing yoga, so the timer softly tells me it's time to change my asana. Before I added this feature to my timer, I needed to change intervals manually or not use the timer at all, relying on the wall clock instead.