Walking and hiking are two of the most popular exercises and this is why treadmills are one of the most popular pieces of indoor equipment. Anyone can begin these activities with little or no preparation and can do them safely at practically any age. The great thing about using a treadmill is you can create different workouts to suit all energy levels. A treadmill is a great way to build well-shaped, healthy looking legs, cut fat and build aerobic stamina. For those who wish to run like the wind, high intensity jogging will burn a lot of calories, further increase your metabolism and also assist in building core muscles. Incorporate some hill running and further improve your overall power, strength and fitness level.