half marathon in two parts

Yesterday in the gym, I hopped on the treadmill for 17km, inclination 1, speed 10.6-11.1km/hr (too slow for you!). I then went to a 45min rpm class (rpm is like spin class but with intervals), and then back on the treadmill for 4km, first 2km inclination 1, last 2km inclination 1.5, speed 10.7-11km/hr. I finished off the day with 20min abs and stretching, and of course sauna and steam bath.