Well, I completed this last night and was delighted to do so.
I've noticed that when I start a run, my legs are OK but I get out of breath. By the second or third run it's the other way around - breathing is OK but legs get more heavy. Then when I finish and do my warm down I can feel my hamstrings tightening. Is there any benefit to be had from compression clothing which might help with this? Or are they just a gimmick?