Pace is the time it takes to cover one km e.g. 6.00min for a km, while speed is the number of km per hour that equates to e.g. 6.00min divided by 60.00min = 10 km per hour. So as you cover each lm quicker e.g 5.00m then the speed will equal 60/5 = 12 km per hour. I hope this helps.