Jim Ryun's Progression Workout

Dr. Daniels talks about Olympic medalist Jim Ryun's test workout for the mile.

[aloispfusterl]

2x600m slower than mile race pace (600m jog after each) /
3x400m at mile race pace (400m jog after each) /
4x300m faster than mile race pace (300m jogs after each) /
6x200m at 800m race pace (200m jogs after each) /

[gowers]

Seems like that's a workout under the category of "race practice"; one that can't be done too often, and one where you have to be in that narrow window of nearly peak form towards the end of the season.