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.
Bored with the treadmill? Not seeing the results you want? It's time to supercharge your treadmill time. Treadmill workouts can be some of the most efficient, challenging, calorie-burning routines around. The key is intervals. With intervals, instead of trudging along at a steady pace, you'll mix up your speed and add floor exercises into your routine.