Ergograph


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ergograph

[′ər·gə‚graf]
(engineering)
An instrument with a recording device used to measure work capacity of muscles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ergograph

 

an instrument for recording the work performed by muscles during studies of the dynamics of their work capacity. Ergographs vary according to the muscles to be studied and may be classified as finger (Figure 1), hand, leg, trunk, or eye ergographs.

Figure 1. Mosso’s finger ergograph: (1) movement sensor, (2) recording unit, (3) carriage, (4) components that move the strip chart, (5) weight, (6) strip chart for recording an ergogram

The ergograph was invented in 1890 by the Italian physiologist A. Mosso. It uses special mechanical or electric sensors to record the amplitude and time of the contraction and relaxation of muscles functioning at a given rate while doing certain types of work, such as raising and lowering a weight, compressing a spring, or shifting an object of fixation between a near point and the closest point of clear vision. The subject usually operates the ergograph to the point of exhaustion, which is manifested by a decrease in the amplitude of the subject’s movements (Figure 2).

Figure 2. Ergogram of muscle fatigue: (A) optimum work capacity, (B) development of fatigue

The ergograph may be used to evaluate a person’s work capacity in different kinds of physical and mental labor or during exposure to various environmental factors. (See alsoERGOMETER.)

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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The aim of the study is to assess the gender differences in muscle functions using hand-grip dynamometer, Mosso's ergograph, bicycle ergometer, and respiratory endurance in young adults.
Ergograph is an instrument used to assess the performance of the flexors of the finger of the hand.