Mechanics of a rope-braked cycle ergometer flywheel and its use for physiological measurement

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

doi:10.1080/15438620500359919

Mechanics of a rope-braked cycle ergometer flywheel and its use for physiological measurement

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

Research output: Contribution to journal › Article › peer-review

Abstract

The cycle ergometer is one of the main tools used by physiologists in studies involving the measurement of work or power against physiological criteria. The current mechanical analysis of a Monark 824E rope-braked ergometer is based on a simplified approach. In this study a detailed analysis of the system is adopted to increase understanding. The mechanics of the ergometer flywheel are explained using data generated experimentally and the detailed components of the values of work that comprise the total work done by a subject are discussed. The total work done by a subject in 2.5 minutes at a speed of 60 rpm against a brake mass of 3 kg was 23,034 J compared with the value of 27,000 J that normally would be attributed using the traditional calculations. This 15% difference is mainly due to the incorrect assumption that the brake load is the force due to the basket mass.

Original language	English
Pages (from-to)	331-344
Number of pages	14
Journal	Research in Sports Medicine
Volume	13
Issue number	4
DOIs	https://doi.org/10.1080/15438620500359919
Publication status	Published - 20 Aug 2006
Externally published	Yes

Keywords

mechanical engineering
human performance measurement
work and power

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10.1080/15438620500359919

Cite this

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title = "Mechanics of a rope-braked cycle ergometer flywheel and its use for physiological measurement",

abstract = "The cycle ergometer is one of the main tools used by physiologists in studies involving the measurement of work or power against physiological criteria. The current mechanical analysis of a Monark 824E rope-braked ergometer is based on a simplified approach. In this study a detailed analysis of the system is adopted to increase understanding. The mechanics of the ergometer flywheel are explained using data generated experimentally and the detailed components of the values of work that comprise the total work done by a subject are discussed. The total work done by a subject in 2.5 minutes at a speed of 60 rpm against a brake mass of 3 kg was 23,034 J compared with the value of 27,000 J that normally would be attributed using the traditional calculations. This 15% difference is mainly due to the incorrect assumption that the brake load is the force due to the basket mass.",

keywords = "mechanical engineering, human performance measurement, work and power",

author = "Franklin, {Kathryn L.} and Gordon, {Rae S.} and Baker, {Julien S.} and Bruce Davies",

year = "2006",

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doi = "10.1080/15438620500359919",

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T1 - Mechanics of a rope-braked cycle ergometer flywheel and its use for physiological measurement

AU - Franklin, Kathryn L.

AU - Gordon, Rae S.

AU - Baker, Julien S.

AU - Davies, Bruce

PY - 2006/8/20

Y1 - 2006/8/20

N2 - The cycle ergometer is one of the main tools used by physiologists in studies involving the measurement of work or power against physiological criteria. The current mechanical analysis of a Monark 824E rope-braked ergometer is based on a simplified approach. In this study a detailed analysis of the system is adopted to increase understanding. The mechanics of the ergometer flywheel are explained using data generated experimentally and the detailed components of the values of work that comprise the total work done by a subject are discussed. The total work done by a subject in 2.5 minutes at a speed of 60 rpm against a brake mass of 3 kg was 23,034 J compared with the value of 27,000 J that normally would be attributed using the traditional calculations. This 15% difference is mainly due to the incorrect assumption that the brake load is the force due to the basket mass.

AB - The cycle ergometer is one of the main tools used by physiologists in studies involving the measurement of work or power against physiological criteria. The current mechanical analysis of a Monark 824E rope-braked ergometer is based on a simplified approach. In this study a detailed analysis of the system is adopted to increase understanding. The mechanics of the ergometer flywheel are explained using data generated experimentally and the detailed components of the values of work that comprise the total work done by a subject are discussed. The total work done by a subject in 2.5 minutes at a speed of 60 rpm against a brake mass of 3 kg was 23,034 J compared with the value of 27,000 J that normally would be attributed using the traditional calculations. This 15% difference is mainly due to the incorrect assumption that the brake load is the force due to the basket mass.

KW - mechanical engineering

KW - human performance measurement

KW - work and power

U2 - 10.1080/15438620500359919

DO - 10.1080/15438620500359919

M3 - Article

SN - 1543-8627

VL - 13

SP - 331

EP - 344

JO - Research in Sports Medicine

JF - Research in Sports Medicine

IS - 4

ER -

Mechanics of a rope-braked cycle ergometer flywheel and its use for physiological measurement

Abstract

Keywords

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