When I say high mileage I mean 70 plus.Alot of 800m runners that are heavier 160lbs or over tend to run lower mileage. Do you think weight is a big factor in determining the mileage you should run?More weight equals more force to absorb which leads to more stress on to joints.Seb Coe is 119 while brazier is 165, if Brazier ran the same mileage as Coe he is far more likely to get injured. Vasquez is 179 and runs even less than Brazier.