BONK!

Well, now I know what that feels like.

I was supposed to bike yesterday, but my energy levels just weren't where I needed them to be, plus my schedule was a little ornery, so I moved the ride to today. After prolonging the inevitable to the afternoon, I hopped up on the trainer and started Spinervals 14.0 - Totally Time Trial. This ride has a 25 minute warm up and four 15 minute sets of time trial simulating LT workouts. This means that I should be riding hard and staying at or above lactic threshold (for me, around 160-165) the entire time.

The first set I did pretty well. The second set, I found that it was harder for me to stay consistently at LT, I floated around 155-163 but I pushed when I noticed I was flagging and was able to "focus" my way back to threshold. The third set, however, I was barely able to keep my HR in the 150s. I was pedaling as hard as my body would pedal and I didn't have anything else to give. Typically, if I'm pedaling as hard as I can and I'm just fatigued, my heart rate shows the effort. Mine was at 143. WTF?

I literally felt like I was in a car, pedal to the floor and the tank only had fumes and was coasting to a stop.

I decided to quit the workout since it wasn't doing what it was supposed to. No sense in pushing my body and getting nowhere.

Heart rate data.