How can this happen

• by Stillrunning
• 2013-09-16 11:09:21
• Checkups & Settings
• 1224 views
• 4 comments

Ok so I'm still trying to adjust to the last changes to my PM settings as I posted the last couple a days. So I go for a typical 5 mile run today wearing my Garmin HR monitor to see if I can gather some data to give feedback to the Dr. And device tech.
I run a very comfortable pace which today was about 9:12 first 3 1/2 miles I was within 5 - 8 secs each mile. I did not look at HR only glanced at pace to make sure since I was feeling so comfortable all through this time I was focused more on my breathing pattern than any thing else,,,,it was a very, very comfortable 1 breath every 4th step. This is a rate from yrs of running I know all else being equal I could do for 10+ miles.
Then at this point there is a slight rise,,not a real hill,, but I fell breathing changing to ever 3rd step and getting deeper and deeper. I'm now starting to be forced to slow down as oxygen requirement is more than I'm keeping up with. I fight this for the next 1/2 to 3/4 mile and then I'm forced to the edge of the road by passing semi trucks and start to walk due to this for about 15 secs. I start running right away and notice I'm not winded and and start to push the pace more and more. I end up running the last 3/4 mile at 7:20 pace and feel fantastic and could have continued but was at my house.
This makes no sense to me,,,I think it's in the pacing,,,oh yes by the way my HR monitor says I ran the first mile at 165 - 170 HR and all after that at 110 to 120 HR