The Day Report: USA Pro Challenge 2015 – Stage 6

The break finally succeeds at the USA Pro Challenge! After a week of tough racing in the highest parts of Colorado’s Rocky Mountains, the peloton finally gave a little too much room to the lead group of 7, that became 6 when Danny Summerhill crashed on the descent with 50km to go.

Early on in the stage, UnitedHealthcare controlled the race in support of securing the sprint jersey for Kiel Reijnen through the first two intermediate sprints. As soon as this goal was accomplished, they took their foot off of the accelerator and 7 riders immediately took advantage of this to form the first breakaway of the day.

Buckhorn Canyon, climbing up to Rist Canyon did not look overly challenging on paper, with just an average gradient of 4% for 19.2km, but the final 1.6km averaged 13.5% to test the legs of the riders who were just hanging on. The peloton rode it conservatively as it was too far from the finish for any GC battles and with the ensuing 15km descent, the break was able to hold their advantage through to the finish line. The sprint teams chased hard, but their calculations were wrong and it was in vain. Tinkoff-Saxo’s Roman Kreuziger won the sprint with Javier Mejias of Novo Nordisk in second and Leonardo Basso of Trek Factory Racing in third.

We went to UnitedHealthcare’s powerful sprinter, John Murphy to gain some insight on the stage. With such an emphasis on winning the first two intermediate sprints for the team, they were left a little vulnerable when the break went up the road. The bullets they spent early, hurt them later on, and although they were able to move Reijnen into a solid 12 point lead in the sprint jersey, the second goal of the stage win didn’t pan out.

Power is very relative to bodyweight and with Murphy weighing about 81kgs (according to his bio), he presents as a strong and powerful sprinter. Impressively, he has held on well in the mountains and being back down at 1500m of elevation in this stage, his sustained power has increased with the additional oxygen available.

In reviewing Murphy’s race file today, we see the two leadouts that he performed for Reijnen for the intermediate sprints. The first was 1min05sec at 617W and the second was 45sec at 584W.

His pedalling efficiency as shown on Pioneer Cyclo-Sphere during one of his sprints shows his excellent pedalling technique. He not only applies great pressure on the pedals on the downstroke, but he is also able to pull up enough on the upstroke to add power to the pedalling revolution. This is a difficult thing to achieve and in fact, many people actually apply negative force here and reduce their overall power.

Highlighting some larger chunks of data, it is clear to see John’s efforts in the first hour with 381 Watts normalized power, which is likely not far from his maximal sustained power for this time period. Normalized watts are an estimation of what your average watts would be if you were to smooth out the effort and keep the power output sustained – an estimation of the true physiological cost of the effort.

The final 1.6km at 13.5% kick up to Rist Canyon, Murphy had to average 412W for 7min20sec to stay with the bunch. His final leadout was just 10sec long and he averaged 1050W. He finished 7th on the stage and Reijnen 9th.

The women also raced today on a similar course. It was great seeing them racing on the big stage of the USA Pro Cycling Challenge with excellent support. Taylor Wiles from DNA Racing took the win.

Don’t forget to catch us tomorrow for the final stage of this year’s USA Pro Challenge, racing 110km from Golden to Denver.

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