Reading Chris Mcpeake's blog I think I have figured out whats wrong, I have a "Broken Ass" , well at least half a one. Things were no better or worse after yesterdays outing so I thought what the hell I will try it again! I sort of hummed and hahed a for a bit but when I got up off my chair at 02:30 am it felt good so off I went.
It wasn't too bad. I ramped up to a blazing 6:00 pace within a couple of hundred meters then held the pace through 5K. I was OK until I did my cool down ... walking was tough! So I showered then hobbled back to my work station and now here I am blogging!
Will see how I feel tomorrow....
Good resource - Click on this link for a really cool table on coax power handling and cable loss.