Device for on-the-water measurement of rowing output |
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Authors: | Kyle C Pilgeram Michael J Delwiche |
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Institution: | (1) Department of Biological & Agricultural Engineering, University of California, One Shields Avenue, 95616 Davis, CA, USA |
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Abstract: | All those who compete in the sport of rowing have used the land rowing machine, Ergometer (commonly called the ‘erg’), manufactured
by Concept II (Morrisville, Vermont, USA). Ergon is the Greek word for work, hence the Ergometer measures work. Rowers are
commonly ranked according to their ‘erg score.’ The fault in this ranking is that the land Ergometer cannot account for many
of the important technical aspects associated with rowing on the water. The goals of this project were to (1) develop a system
for on-the-water measurement of work during rowing and then (2) demonstrate the potential of such a system to quantify performance
and improve rowing technique. To achieve these goals, force was measured using strain gauges glued to the shaft of the rowing
oar and angular displacement was measured using a potentiometer. The force and displacement measurements were sent to a microcontroller,
which calculated the total work done in a particular stroke, as well as other parameters, and displayed the values to the
rower. The parameters were used to evaluate the performance of three collegiate rowers on the water. The data were also used
to plot force profiles, which were reviewed with each rower and the coach to illustrate the rowers’ habits and facilitate
improving technique. One rower was ‘tutored’ with the device through five on-the-water practices, after which his force profiles
and parameter values demonstrated significant improvement. The device not only provided a standard to which all rowers were
compared on the water, but also supplied the rowers with important information on technical aspects of their strokes and pacing
themselves. |
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Keywords: | ergometer force profile power crew |
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