Determination of aerobic work and power on a rope-braked cycle ergometer by direct measurement

Rae S. Gordon, Kathryn L. Franklin, Julien S. Baker, Bruce Davies

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to compare the power and work outputs of a cycle ergometer using the manufacturer’s guidelines, with calculations using direct flywheel velocity and brake torque. A further aim was to compare the values obtained with those supplied by the manufacturer. A group of 10 male participants were asked to pedal a Monark 824E ergometer at a constant cadence of 60 r/min for a period of 3 min against a resistive mass of 3 kg. The flywheel velocity was measured using a tachometer. The brake force was determined by measuring the tension in the rope on either side of the flywheel. The calculated mean power was 147.45 ± 6.5 W compared with the Monark value of 183 ± 3.7 W. The difference between the methods for power estimation was 18% and was statistically significant (p < 0.01). The mean work done by the participants during the 3 min period was found to be 26 460 ± 1145 J compared with the Monark value of 33 067 ± 648 J (p < 0.01). The Monark formulae currently used to determine the power and work done by a participant overestimates the actual values required to overcome the resistance. There findings have far-reaching implications in the physiological assessment of athletic, sedentary, and diseased populations.
Original languageEnglish
Pages (from-to)392-397
Number of pages6
JournalApplied Physiology, Nutrition, and Metabolism
Volume31
Issue number4
DOIs
Publication statusPublished - 12 Jul 2006
Externally publishedYes

Fingerprint

Torque
Sports
Foot
Guidelines
Population

Keywords

  • cycle ergometry
  • rope-braked
  • tension measurement
  • low-intensity power

Cite this

@article{b4258a6d599842988a1bd2df5dd3d034,
title = "Determination of aerobic work and power on a rope-braked cycle ergometer by direct measurement",
abstract = "The purpose of this study was to compare the power and work outputs of a cycle ergometer using the manufacturer’s guidelines, with calculations using direct flywheel velocity and brake torque. A further aim was to compare the values obtained with those supplied by the manufacturer. A group of 10 male participants were asked to pedal a Monark 824E ergometer at a constant cadence of 60 r/min for a period of 3 min against a resistive mass of 3 kg. The flywheel velocity was measured using a tachometer. The brake force was determined by measuring the tension in the rope on either side of the flywheel. The calculated mean power was 147.45 ± 6.5 W compared with the Monark value of 183 ± 3.7 W. The difference between the methods for power estimation was 18{\%} and was statistically significant (p < 0.01). The mean work done by the participants during the 3 min period was found to be 26 460 ± 1145 J compared with the Monark value of 33 067 ± 648 J (p < 0.01). The Monark formulae currently used to determine the power and work done by a participant overestimates the actual values required to overcome the resistance. There findings have far-reaching implications in the physiological assessment of athletic, sedentary, and diseased populations.",
keywords = "cycle ergometry, rope-braked, tension measurement, low-intensity power",
author = "Gordon, {Rae S.} and Franklin, {Kathryn L.} and Baker, {Julien S.} and Bruce Davies",
year = "2006",
month = "7",
day = "12",
doi = "10.1139/h06-011",
language = "English",
volume = "31",
pages = "392--397",
journal = "Applied Physiology, Nutrition, and Metabolism",
issn = "1715-5312",
publisher = "Canadian Science Publishing (NRC Research Press)",
number = "4",

}

Determination of aerobic work and power on a rope-braked cycle ergometer by direct measurement. / Gordon, Rae S.; Franklin, Kathryn L.; Baker, Julien S.; Davies, Bruce.

In: Applied Physiology, Nutrition, and Metabolism, Vol. 31, No. 4, 12.07.2006, p. 392-397.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Determination of aerobic work and power on a rope-braked cycle ergometer by direct measurement

AU - Gordon, Rae S.

AU - Franklin, Kathryn L.

AU - Baker, Julien S.

AU - Davies, Bruce

PY - 2006/7/12

Y1 - 2006/7/12

N2 - The purpose of this study was to compare the power and work outputs of a cycle ergometer using the manufacturer’s guidelines, with calculations using direct flywheel velocity and brake torque. A further aim was to compare the values obtained with those supplied by the manufacturer. A group of 10 male participants were asked to pedal a Monark 824E ergometer at a constant cadence of 60 r/min for a period of 3 min against a resistive mass of 3 kg. The flywheel velocity was measured using a tachometer. The brake force was determined by measuring the tension in the rope on either side of the flywheel. The calculated mean power was 147.45 ± 6.5 W compared with the Monark value of 183 ± 3.7 W. The difference between the methods for power estimation was 18% and was statistically significant (p < 0.01). The mean work done by the participants during the 3 min period was found to be 26 460 ± 1145 J compared with the Monark value of 33 067 ± 648 J (p < 0.01). The Monark formulae currently used to determine the power and work done by a participant overestimates the actual values required to overcome the resistance. There findings have far-reaching implications in the physiological assessment of athletic, sedentary, and diseased populations.

AB - The purpose of this study was to compare the power and work outputs of a cycle ergometer using the manufacturer’s guidelines, with calculations using direct flywheel velocity and brake torque. A further aim was to compare the values obtained with those supplied by the manufacturer. A group of 10 male participants were asked to pedal a Monark 824E ergometer at a constant cadence of 60 r/min for a period of 3 min against a resistive mass of 3 kg. The flywheel velocity was measured using a tachometer. The brake force was determined by measuring the tension in the rope on either side of the flywheel. The calculated mean power was 147.45 ± 6.5 W compared with the Monark value of 183 ± 3.7 W. The difference between the methods for power estimation was 18% and was statistically significant (p < 0.01). The mean work done by the participants during the 3 min period was found to be 26 460 ± 1145 J compared with the Monark value of 33 067 ± 648 J (p < 0.01). The Monark formulae currently used to determine the power and work done by a participant overestimates the actual values required to overcome the resistance. There findings have far-reaching implications in the physiological assessment of athletic, sedentary, and diseased populations.

KW - cycle ergometry

KW - rope-braked

KW - tension measurement

KW - low-intensity power

U2 - 10.1139/h06-011

DO - 10.1139/h06-011

M3 - Article

VL - 31

SP - 392

EP - 397

JO - Applied Physiology, Nutrition, and Metabolism

JF - Applied Physiology, Nutrition, and Metabolism

SN - 1715-5312

IS - 4

ER -