Interpreting your assessment
After you press the assess button, you will notice that 3 fields are normall populated.  The first is your result, the second is your assessment in terms of percentil, and the last is a descriptive term representing your population grouping.  A screen capture is shown below.

Percentile is your standing in the population.  Click on the question mark icon for say the 12 Minute Run test to learn more about percentiles

Performance will normally be a descriptive term such as , normal, above average, excellent or superior.