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You can measure Calories burned two ways; Calories over time or Calories over distance. For running, you burn the same number of Calories to cover a given distance regardless of pace. The number of Calories burned running depends only on your weight and the slope. For walking, your pace also makes a difference; the faster you walk the more Calories it takes to cover the distance. There are various formulas for calculating Calories burned<ref name="Givoni-1971"/><ref name="Minetti-2002"/>, but there is a wide variation based on [[Running Efficiency Calculator| Efficiency]]. For instance Paula Radcliffe improved her [[Running Economy]] by nearly 20% over 10 years. The tables below default to showing values for a 150 pound person, but you can use the form at the bottom of the page to generate tables specific to your body weight. (Selecting Kg will change the distances units to Km.)
=The difference between Difference Between Running and Walking=
Running and walking are two different forms of movement. In running you either have one foot on the ground or both feet in the air; both feet are never on the ground at the same time. In contrast, when walking you either have one or both feet on the ground and never have both feet in the air.
=The Transition Between Running and Walking=
The energy required to run a given distance is the roughly the same regardless of pace. This is different to walking, where the energy required to walk a given distance generally goes up with pace. This means that at slow speeds, it costs less energy to walk than run, but as you go faster it becomes easier to run. When people are put on a treadmill and the speed gradually increased, they will naturally transition from walking to running. This transition occurs at roughly the same speed for most people and is called the Preferred Transition Speed (PTS)<ref name="Rotstein-2005"/>. You can see this in the two graphs below. The graph on the left shows the energy expenditure over time, showing the energy required to walk goes up faster than for running. The graph on the right shows the cost per distance, with running staying constant and the cost of walking rising with pace. (It takes more energy to walk a distance very slowly, so the graph shows the low point which is the lowest energy cost to cover a distance.)
{| class="wikitable"
|- valign="top"
|[[File:Energy cost and transition.jpg|right|thumb|300px|Energy cost over time.]]
|[[File:Energy cost and transition Distance.jpg|right|thumb|300px|Energy cost over distance.]]
|}
<include_PHP file="CalorieInc_Setup"/>
=Calories Per Hour=
<ref name="Givoni-1971"> {{Cite journal | last1 = Givoni | first1 = B. | last2 = Goldman | first2 = RF. | title = Predicting metabolic energy cost. | journal = J Appl Physiol | volume = 30 | issue = 3 | pages = 429-33 | month = Mar | year = 1971 | doi = | PMID = 5544128 }}</ref>
<ref name="Minetti-2002"> {{Cite journal | last1 = Minetti | first1 = AE. | last2 = Moia | first2 = C. | last3 = Roi | first3 = GS. | last4 = Susta | first4 = D. | last5 = Ferretti | first5 = G. | title = Energy cost of walking and running at extreme uphill and downhill slopes. | journal = J Appl Physiol | volume = 93 | issue = 3 | pages = 1039-46 | month = Sep | year = 2002 | doi = 10.1152/japplphysiol.01177.2001 | PMID = 12183501 }}</ref>
<ref name="Rotstein-2005"> {{Cite journal | last1 = Rotstein | first1 = A. | last2 = Inbar | first2 = O. | last3 = Berginsky | first3 = T. | last4 = Meckel | first4 = Y. | title = Preferred transition speed between walking and running: effects of training status. | journal = Med Sci Sports Exerc | volume = 37 | issue = 11 | pages = 1864-70 | month = Nov | year = 2005 | doi = | PMID = 16286854 }}</ref>
</references>