https://community.usms.org/swimming/f/general/10676/great-mid-d-to-d-training-coaching-and-parent-alertsThis was part 2 of Garrett McCaffrey&#39;s interview with Katie Ledecky&#39;s coach, Yuri Suguiyama, and it has something for everyone, including an awesome set that I imagine will soon be appearing in a workout forum near you and especially a note for parentsen-USTelligent Community 12https://community.usms.org/thread/176550?ContentTypeID=1Tue, 05 Jun 2012 11:06:47 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:e2f91c3d-a2b9-4f93-8049-483bae8714abjaadams1If you are referring to 12 X 300, I agree this is the best set known to mankind long course. Unfortunately, it turns many swimmers into whiners. I think it is the equivalent of 20 X 200 short course. Anything LCM gets me whining...but I&#39;m not whining &#39;cause I&#39;m not a sprinter. :banana:<div style="clear:both;"></div>https://community.usms.org/thread/176533?ContentTypeID=1Tue, 05 Jun 2012 10:56:33 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:81eeca62-ea38-4217-ab93-2d98cf169fa7aquageekIf you are referring to 12 X 300, I agree this is the best set known to mankind long course. Unfortunately, it turns many swimmers into whiners. I think it is the equivalent of 20 X 200 short course.<div style="clear:both;"></div>https://community.usms.org/thread/176519?ContentTypeID=1Mon, 04 Jun 2012 11:27:59 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:332f2008-1c06-400d-8b2f-c8cb6df3da6cjaadams1That was good. Thanks for posting. I remember doing a descending interval set like that a while back as well. It was either 300s or 400s, I can&#39;t remember, but I did it with a :10 drop in interval after each rep, eventually getting to a darn near impossible interval to try to get under. Those are called &quot;good for you&quot; sets. :afraid:<div style="clear:both;"></div>