At first it’s not so bad. I pedal at my usual speed on my indoor bike at home and I feel warm but nothing abnormal. Ten minutes later, however, I’m about as uncomfortable as I can be during a training session.
I notice it first in my heart rate measured by my chest strap: 180 bpm. One-hundred-and-eighty? I would normally be at about 140 or lower. Then it’s my hands—they are covered in sweat. Sweat drips down my face and nose and onto the towel covering my handlebars. I reach down for my bottle and sip the water. Just 12 minutes in and this is disgusting. I want to unzip my jersey, take it off, but I don’t. I sweat.
