According to the compendium of physical activity, which is the source for nearly any exercise calorie count you're gonna find online or in books, running in place is equal to 8 Mets which it also equates to running 5 mph on level ground, regardless of your body weight.
I'm guessing that one may take more steps per minute when running in place and that's why the energy use seems pretty high.
Your running speed and step count per minute while running in place are variables that make the comparison difficult.
Suffice it to say, running faster than 5mph should increase your calorie burn considerably vs. jogging in place.
http://prevention.sph.sc.edu/tools/d...compendium.pdf
Running in place would seem to involve more frontal lifting muscles (like the hip flexors) and less of the pushing muscles, like the quads and gluteals.
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