Wikipedia
Fitwalking
Fitwalking is the act of walking with a speed at the upper end of the natural range for the walking gait, typically 7 to 9 km/h (4.5 to 5.5 mph), and is a non-competitive sport. Both feet can raise from the ground at any time, in contrast to power walking.
Racewalking is the competitive version of fitwalking, and is present at the Olympics, with three different events: 50 km men, 20 km women and 20 km men.