Ever wondered why we do 10 x 4 min? Probably because there are 10 fingers so its easy to count, 4min the clock goes round 4 times. 400m, 800m the coach doesn't have to move and can always be in the same place! Swim 50m once again the coach doesn't have to move (lazy coach?). 8x3min, its the coaches favourite interval!!! and God help you if you cant finish the intervals and your time and heart rate starts dropping!!
We are hoping we are training the cardiac or VO2 etc. We are thinking that a workout has a certain effect but really we do not have a clue and just blindly hope because it has worked on other athletes. Its the world of objective training values. How about training on physiological parameter? That will be the discussion in the next topic. Here for further reading understanding intervals and quantifying intervals.
