I have never been a "full-time" master's racer, but I am certainly a "part-time" guy who puts in about 20 hrs per week (before July's crash). Like Carleton, I was tired, slept a lot etc. I finally fixed it by training the same but changing jobs to cut out about 4 hrs of commute to my job every day. Amazing what 4 extra days lets you do! Now back to about 12 hrs per week without gym work (doctors still don't want me stressing shoulder...but soon now). Seems to be working.