Reply To: Training in SCY and racing in LCM
If this is a huge problem, it is possible to simplify to just accept that LC/SC are not exactly convertable. If so, you can use a strategy to only change practice target times when swimmers complete their sets (e.g. 20X without Three fails or two consecutive fails).
I realise that this is individual, and some swimmers will never be able to complete more than 12x and still improve, while others might need in excess of 25x @target pace to actually improve. Look where they plateau and you should have a fair estimate.