" It is defined in sporting terms as a gait in which at some point all feet are off the ground at the same time. It is a form of aerobic exercise . Jogging Jogging is a poorly-defined term which generally refers to a type of slow running, previously called "roadwork" when athletes in training, such as boxers, customarily ran several miles each day as part of their conditioning. In the 1960s or 1970s the word "roadwork" was mostly supplanted by the word "jogging" and this form of running became quite popular among many people at that time in the United States. Jogging is a "high-impact" exercise that places strain on the body, notably the joints of the knee. This is actually one of the basic reasons for doing the exercise, as the impact drives growth processes in the body. Some dropped jogging in order to take up "low-impact" exercises such as stair climbing. Asics Gel Kayano Running Shoes Jogging can be combined with other kinds of exercising. Special trails that combine them are called trim trails. "

" Race courses are usually held on the streets of major cities and towns but they could be on any sealed road. Most road races are either 5 km (3. 1 miles), 10 km (6. 2 miles), half-marathon (21. 097 km, 13. 1 miles), or marathon (42. 195 km, 26. Asics Running Shoes For Woman2 miles), but non-standard distances are also acceptable. The "Round the Bays" run in Auckland, New Zealand is 8. "