pace, then drop the pace by two to three seconds for each successive 400mRecovery: Jog for four minutes between repeats.Ed Eyestone is an exercise physiologist and two-time Olympic marathon runner.

the oxygen and maintain the workload. As a result, your fitness improves.According to the French researchers, vVO2max can be estimated as the speed a runner can maintain for an all-out six-minute time trial. Therefore, to determine your vVO2max, go to a 400m

for the Olympics, for example, must peak for an arduous trials process, then ramp up their performance again to place well at the Games themselves. When you keep returning to the well like this, how can you make sure the bucket doesn't come up empty? A