My training buddy David and I did our usual training ride today to Claiborne and Tilghman Island and back. I started out bundled up warmly and feeling strong. It was about 27*F with little wind when we started out. But. . . .
On the way heading south we were riding into the wind and you can see my heart rate climbing and climbing as my pace declines steadily. The wind was increasing as we rode, up to about 10 mph with gusts to 15 mph. You can see a squiggle where we rode over the Knapps Narrows bridge (at miles 16 and 21) and then got into the shelter of the wind a little bit on the island.
After the turnaround (visible in the graph at about Mile 19) we were able to pick up the pace a little with the wind at our backs, but the last five miles I totally bonked. I was feeling tired and my back ached and my heart rate went nuts while my pace went into the gutter. It's nice to have the heart rate data after the fact, though, so I know I wasn't totally dogging it at the end - even though I was going slowly my heart said I was still working hard! That, dear readers, is what a bonk looks like!
Fortunately David, who is training for Ironman Coeur d'Alene next June, was able to ride off the front and get a little faster workout in before the end of the day to deposit in his account in the Bank of Ironman!