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.
Depending on the intensity, a person weighing 130 pounds burns on average 472 calories water jogging for one hour. At 155 pounds, the number of calories burned increases to about 563, and 654 for someone weighing 180 pounds.