I recently purchased "Olympic distance tri training program for the fitness athlete."  It's by Dave Scott I believe.  And I was looking through my training regimen today and it said to train on the bike:6 X 10 minutes with 1 minute RI. 10 minute segments are: 3 min. (A) BG + 3 min. (L-1) LG + 4 min. (L-2) TTG (What is highlighted is an example of what I'm wanting to know what it means) These abbr. are not provided in the glossary and also I keep re-re-RE-reading the other two sheets as well and to no avail.  Please someone help me out with these and any other abbreviations that come to mind!  Thanks so much!