HOLE MAN,

Why would a person who wants to find out whether or not POWER CRANKS are
better than regular cranks introduce the highly variable noise that this
study does?

I could just as easily conclude from this data set that the reason why it
showed a 2% increase in "gross effiency" is because the subjects tested
simply had an additional 6 weeks worth of training under their belt. In no
way, shape, or form, could one conclude that the extra 2% gain was due
solely to the use of Power Cranks. In fact, the subjects claimed 2% gain
could have just as easily have come from a 3-4% increase in fitness output
coupled to a decrease of 1-2% (caused by the Power Cranks), thereby
resulting in a 2% net gain.

Also, no reputable scientist claims confidance in a study with an "n"
number of only 6 subjects.

In addition, the University of Kansas and Miami University are both party
schools and any "scientific study" out of these overglorified frat houses
probably aren't going to be appearing in Nature anytime soon.

It was a nice infomercial though. One question: do Power Cranks come with
a ****ing bucket of OxyClean?

Take care,

Racer X



Phil Holman wrote:

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