Kalen Walker, a sprinter at the University of Iowa, ran a 4.15-second 40-yard dash on Saturday—the second-fastest unofficial time ever recorded for the event. The Hawkeye sprinter accomplished the ...
Any form of running is going to improve your VO2 max, which is a measure of how much oxygen you can utilize during intense exercise. Naturally, a tempo run, an intentionally strenuous running workout, ...