[IZ] 1 1/2 Marin Headlands Bike, 7/24

Dist: 22.2 miles
Time: 1:45
Avg: 12.7 MPH

The usual route, except that instead of taking the tunnel back, I climbed up McCullough Road.

I pushed myself, again, even on the second climb. It felt great. I'm still having trouble raising my heart rate above 150, especially on flats. Really the only time my heart rate goes that high is when I'm doing a relatively steep climb and I'm pushing myself. Even then, my legs seem to give out before the heavy breathing sets in. Weird.