Today was one of those" not only did I feel like I hit the wall, I felt like the wall collapsed on top of me" rides.
It wasn't fast (15mph)
It wasn't that far (30 miles)
It wasn't for lack of a warm up (I rode the 4.3 miles into and home from the ride)
Weather was perfect(no wind, moderate humidity levels, started in the high 50s and ended in the low 70s)
I was on the CF (so we can't use weight as the excuse)
I'd had my oatmeal before starting out.
But,(and this has been the last 3 outings) I had nothing..nothing in the legs, nothing in reserve , nothing.
(To qualify..While I don't carry oxygen-don't qualify-I'm usually able to easily keep a 16mph pace and- so long as it's a one time a week deal- I can and have kept 19mph for the duration)
I got home and the stats (oxygen wise-via my own personal Nonim Oximeter)told the story.