So, by 4 × t 1/2 to 5 × t 1/2, the serum levels are reduced by almost 94% to 97% of the peak level. In other words, the entire dose you gave is almost gone from the body by 4 × t 1/2 to 5 × t 1/2. Assume that a dose is given repeatedly and regularly, and that serum levels during one dosing interval are averaged for the sake of discussion.
According to Running Level, the average half marathon time across all ages and sexes is 1:50:15. They classify a good half marathon time for men as 1:43:33 and a good half marathon time for women as 2:00:12, again, across all ages and sexes. 2. So, how do you stack up?1Y7Ly.