https://community.usms.org/swimming/f/general/10470/base-timeAt practice, a set called for doing 5x200 with 1-2 @base, 3-5 @ base plus :15. What does &quot;base&quot; mean? How do you find your base time? Thanksen-USTelligent Community 12https://community.usms.org/thread/173243?ContentTypeID=1Sat, 18 Feb 2012 04:17:11 GMT3187ac58-ba85-4314-b79a-c45cd885e09a:4dc2fb65-c0dc-4581-af98-78767028fc0dPatrick W. BrundageHere are two suggestions for finding your base: My suggestion blatantly ripped off from Coach-to-the-Superstars Dave Salo is a 3 x 300 set described here -- U.S. Masters Swimming Discussion Forums Mallory Mead&#39;s Open Water Thread (U.S. Masters Swimming Discussion Forums) defines a &quot;Best Possible Interval&quot; as the best interval you can hold for 10 x 100<div style="clear:both;"></div>