Good stuff.
Once in the comp. phase and doing the 2 x 300m or so session for the 400m athlete, how do you best continue to advance the performances. Is it simply through the increase in the RI and/or should one move onto to slightly longer distances like 2 x 350m?
Understandbly, the improvements will come from many different factors but how do you best manipulate the SE session, specifically, to keep providing an adequate training stimulus?