Here is a condensed preview of the numbers from the PC testing. The study was conducted by Mark D.
Luttrell, Dept of Health, Sport and Exercise Science, University of Kansas and Jeffrey A.
Pottteiger, Dept of Physical Education, Health and Sports Studies, Miami University.
The effects of 6 weeks of training with PCs was examined for 6 cyclists (+6 with regular cranks) to
determine changes in V02 max, AT, HR, V0, and RER during a 1 hour submaximal ride (~69% V02 max).
Here are the numbers for Heartrate (HR) and Gross Efficiency (GE) before and after training.
Time (minutes)
PC Group 15 30 45 60
HR Pre 154 155 156 157
Post 141 140 141 141
GE (%)Pre 21.5 21.3 21.6 21.5
Post 23.1 23.0 23.6 23.9
Control Group
HR Pre 166 165 166 163
Post 159 159 159 160
GE (%) Pre 21.3 20.8 20.8 21.2
Post 21.8 21.5 21.3 21.0
Significant is the 2% increase in Gross Efficiency of the PC group.
Phil Holman