Hi, 
Many garmin devices (and others) have a setting on the device to tell the machine how frequently to capture data.  Typically this is "every second" or "smart" where it will capture data if it senses a change in a field.   
Is there any way from the FIT file to determine if they had it set to "every second" or "smart".  I couldn't find anything in the docs (but might have overlooked it).
Thanks