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.
The faster you run, the more calories you burn. A 150-pound person burns 119 calories running a mile in 9 minutes. Running that mile in 6 minutes burns 178 calories. Running one 12-minute mile burns 115 calories. The more you weigh, the more you carry around with you and the more calories you burn in every activity. Running a 9-minute mile, a 150-pound person burns 119 calories.