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.
Calories Burned Walking A Mile. Calories Burned Walking A Mile. When you first start a walking program, one of the most liberating things to learn is that the average person burns approximately 100 calories per mile whether you amble, walk, run, jog or sprint a mile.