40266
2017
2017
eng
152
159
3
27
article
Unipress
Padova
1
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2017-07-20
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Measuring system and method of determining the Adaptive Force
The term Adaptive Force (AF) describes the capability of adaptation of the nerve-muscle-system to externally applied forces during isometric and eccentric muscle action. This ability plays an important role in real life motions as well as in sports. The focus of this paper is on the specific measurement method of this neuromuscular action, which can be seen as innovative. A measuring system based on the use of compressed air was constructed and evaluated for this neuromuscular function. It depends on the physical conditions of the subject, at which force level it deviates from the quasi isometric position and merges into eccentric muscle action. The device enables – in contrast to the isokinetic systems – a measure of strength without forced motion. Evaluation of the scientific quality criteria of the devices was done by measurements regarding the intra- and interrater-, the test-retest-reliability and fatiguing measurements. Comparisons of the pneumatic device with a dynamometer were also done. Looking at the mechanical evaluation, the results show a high level of consistency (r²=0.94 to 0.96). The parallel test reliability delivers a very high and significant correlation (ρ=0.976; p=0.000). Including the biological system, the concordance of three different raters is very high (p=0.001, Cronbachs alpha α=0.987). The test retest with 4 subjects over five weeks speaks for the reliability of the device in showing no statistically significant differences. These evaluations indicate that the scientific evaluation criteria are fulfilled. The specific feature of this system is that an isometric position can be maintained while the externally impacting force rises. Moreover, the device can capture concentric, static and eccentric strength values. Fields of application are performance diagnostics in sports and medicine.
European journal of translational myology
10.4081/ejtm.2017.6479
2037-7460
Universität Potsdam, Publikationsfonds
PA 2017_36
416.50
online registration
<a href="http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-402676">Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam : Humanwissenschaftliche Reihe ; 346</a>
CC-BY - Namensnennung 4.0 International
Laura V. Schaefer
Marco Hoff
Frank N. Bittmann
eng
uncontrolled
Adaptive Force
eng
uncontrolled
isometric eccentric force
eng
uncontrolled
muscle action
eng
uncontrolled
motor control
eng
uncontrolled
strength measurement system
Medizin und Gesundheit
Strukturbereich Kognitionswissenschaften
Referiert
Publikationsfonds der Universität Potsdam
Open Access
Universität Potsdam
39290
2015
2015
eng
183
189
7
3
25
article
PAGEPress
Pavia
1
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Report on adaptive force, a specific neuromuscular function
European journal of translational myology
10.4081/ejtm.2015.5183
2037-7452
2037-7460
wos:2015
WOS:000363879000002
Schaefer, L (reprint author), Karl Liebknecht Str 24-25,Haus 24,R114, D-14476 Potsdam, Germany., marko.hoff@gmail.com; lschaefe@uni-potsdam.de; heinke@uni-potsdam.de; bittmann@uni-potsdam.de
Marko Hoff
Laura V. Schaefer
Nancy Heinke
Frank N. Bittmann
eng
uncontrolled
Adaptive Force
eng
uncontrolled
isometric-eccentric force
eng
uncontrolled
muscle action
eng
uncontrolled
pneumatic force measuring system
Referiert
Open Access
Department Sport- und Gesundheitswissenschaften
Institut für Sportwissenschaft