Definition of organism for English Language Learners. : 1  an individual living thing. : 2  a system with many parts that depend on each other and work together.
Figuring out how many calories you burn when running is, on a simple level, a fairly straightforward calculation. Most experts (and lots of studies) suggest that a person of average weight burns about 100 calories in a mile of running.
For example, if you weigh 188 lbs, you will burn about 107 calories (188 * .57) when you walk a mile, and about 135 calories (188 * .72) when you run a mile. As you can see, running a mile burns roughly 26 percent more calories than walking a mile. Running a minute (or 30 minutes, or an hour, etc.) burns roughly 2.3 times more calories than the same total time spent walking. Okay, now a few caveats.