Let the body speak: Jacques Janse van Rensburg Ardennes Power Analysis

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Power Analysis: Jacques Janse van Rensburg achieves PB results in the Ardennes

During the third week of April Jacques Janse van Rensburg from Team Dimension Data for Qhubeka raced the Ardenne’s Classics; Amstel Gold, La Flèche Wallonne and Liège–Bastogne- Liège. Jacques provided excellent in-race support to the team’s designated lead riders and also achieved personal best career results (48th, 58th, 41st respectively).

Summary Data
The Ardennes Classics are hilly one-day World Tour races raced within an 8-day period in April. They are extremely demanding as is reflected by Jacques summary data in Table 1. The TSS scores and work scores for the 2017 editions of AG and LBL (444 and 439 respectively), are amongst the highest race day scores that Jacques has on record career-to-date.

Table 1: Summary Data for Ardennes Classics

While the overall race summary data is impressive, the work done in the last hour of racing highlights the effort required for a winning performance. In the final hour of all 3 races there is a difference of approximately 60W between Jacques average and normalized power. This difference highlights the fluctuations in intensity (accelerations) as the peloton fights for position in the race to the finish line.

Table 2: Final Hour of Racing

Liège–Bastogne- Liège
Jacques file from LBL is shared through Public File Viewer here (hyperlink to PFV) to offer you more insight into the demands of this World Tour event.

An analysis of the final 1:30hr/63km of LBL highlights the intensity at which the riders worked over the final 6 climbs as is detailed in Table 3 and Fig 1. The racing become progressively harder as the domestiques worked to drain the last remaining energy from their competitor’s legs while providing cover for their team’s protected rider.

Table 3: Final Six Climbs of Liège–Bastogne- Liège

Fig 1: Power Output (W/kg) on Final Six Climbs of Liège–Bastogne- Liège for JJvR

These types of analyses are performed regularly by our team coaches. The data help to direct the rider’s specific preparation and training and as well as their in race effort/energy management.

Jacques data was measured by a Rotor2IN powermeter and recorded on a Garmin Edge 820. The data was analysed in TrainingPeaks, the Official Training Software of Team Dimension Data for Qhubeka. This article was prepared by Trevor Court and Dr Carol Austin.