In the Milky Way, about 1 in 5 stars that are like our sun in size, color and age have planets that are roughly Earth's size and are in the habitable zone where life-crucial water can be liquid, according to intricate calculations based on four years of observations from NASA's now-crippled Kepler telescope.
Varying Incline. Varying the incline is another option for interval training using a good treadmill. Exercisers that want to vary the incline for interval training should still start with a warm up period, which should be a walk or slow jog at an incline of 1.0.
How to find the sweet spot for HIIT on a Treadmill. When using your treadmill for HIIT workouts, it may take a little experimenting on your part to find the right settings. Both the speed and incline settings can play important roles in designing a great HIIT workout. Try to find a setting that you can sustain for no more than one minute.