Jan Stensson , Coach JS wrote:
Daniels have a big take over compared to Tinman in the fact that there seem to be no difference in the development of maxVO2 pace if the runner does 3k pace or 5 k pace. 3 k pace is harder on the body compared to 5 k pace , so why do 3 k pace instead of 5 k pace when it`s not necessary and just increase injury risk?? Doing 5 k pace week after week and less injury risk and quite easy being able to do the amount of reps necessary to get enough stimuli for the purpose of the workout is really superior to the 3k pace option. This is the real true smart way of "Keeping the ball rolling" ))
Tinman himself posted research in his videos saying that for improving performance in distance races (3k-marathon), training at 95% VO2MAX (which is Daniel's I-pace or ~5k pace for fit runners) is just as effective as training at 100% VO2MAX. Only for the mile and faster races training at 100% of VO2MAX has shown to be necessary.
Yet, Tinman seems to use 3k pace or 100% VO2MAX in his athletes more than 5k pace. I'm not sure why, but one reason I can imagine is the additional leg strength that's developed when running at a faster pace. Aerobic adaptions are just one part of training, maybe 3k pace doesn't do anything more aerobically or to develop VO2MAX further than 5k pace but it certainly builds more muscular strength.
Also, Tinman uses VO2MAX workouts sparingly - around once every 2 weeks, maybe 3 weeks for runners who are not as fit. So he can make them a bit tougher, since he follows them up with plenty of recovery. Obviously hard, voluminous 3k workouts week after week would not work, that's gonna break anyone down. But even with 5k pace I can see it be dangerous, especially if it's longer reps like Daniel's suggests (~1k).