what is running speed
The Average walking speed is 3-4 MPH 5-6 KmPH or about 100 yards/meters per minute. Running speed sustained is about twice that 8 MPH, 12 KmPH or 200 yards/meters per minute. The original answer is misleading 15MPH is world class. Sprinting up to 100 yards - record is ~23 MPH - average ~14. Running up to a mile /1600 meters record is ~16MPH - average ~10MPH. Marathon distance record ~26 Mile/42 Km is ~13MPH/21KmPH. reasonable 9MPH 14KmPH (NY marathon qualification time)