244 Fatigue Rates of Vastus Medialis Oblique and Lateralis During Short-Arc Quadriceps Exercise

Grabiner, Mark D.; Koh, Timothy J.; DeLozier, G. S.

doi:10.1249/00005768-199004000-00244

Cited by 2 publications

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“…Whereas the magnitude of peak moment is increased with pre-tensions up to 40% peak torque in elderly men and women, peak RFD is decreased when active force is present prior to the onset of an impulsive action [81, 82]. Similarly, it appears that the magnitude, duration and speed of force exertion by the antagonist muscle(s) immediately prior to the onset of the agonist(s) action may influence both RFD and peak moment [83, 84]. …”

Section: Discussionmentioning

confidence: 99%

Robot-assisted assessment of muscle strength

Toigo

Flück

Riener

et al. 2017

J NeuroEngineering Rehabil

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Impairment of neuromuscular function in neurological disorders leads to reductions in muscle force, which may lower quality of life. Rehabilitation robots that are equipped with sensors are able to quantify the extent of muscle force impairment and to monitor a patient during the process of neurorehabilitation with sensitive and objective assessment methods. In this article, we provide an overview of fundamental aspects of muscle function and how the corresponding variables can be quantified by means of meaningful robotic assessments that are primarily oriented towards upper limb neurorehabilitation. We discuss new concepts for the assessment of muscle function, and present an overview of the currently available systems for upper limb measurements. These considerations culminate in practical recommendations and caveats for the rational quantification of force magnitude, force direction, moment of a force, impulse, critical force (neuromuscular fatigue threshold) and state and trait levels of fatigue.

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Section: Discussionmentioning

confidence: 99%

Robot-assisted assessment of muscle strength

Toigo

Flück

Riener

et al. 2017

J NeuroEngineering Rehabil

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Effects of antagonist pre-load on knee extensor isokinetic muscle performance

Carregaro

Gentil

Brown

et al. 2011

Journal of Sports Sciences

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The aim of this study was to evaluate and compare acute effects of a reciprocal action protocol and a super-set protocol on knee extensor performance during concentric isokinetic exercise. Fourteen men aged 29.4 ± 6.1 years were tested on three different protocols, with 1 min of rest between sets: control (3 sets of 10 isokinetic knee extension repetitions), reciprocal action protocol (3 sets of 10 repetitions of reciprocal isokinetic concentric knee flexion and knee extension repetitions), and super-set protocol (3 sets of a combination of 10 repetitions of knee flexion immediately followed by 10 repetitions of knee extension repetitions). Tests were performed at 60° · s(-1) and 180° · s(-1), randomized across 3 days and separated by at least 72 h. There were no significant differences between protocols for peak torque at 60° · s(-1) or 180° · s(-1). Total work was significantly higher during the reciprocal action protocol compared with the super-set protocol at 60° · s(-1). There was a significant decline in peak torque (from 240.6 to 212.9 N · m) and total work (from 2294 to 1899 J) for the control condition at 60° · s(-1). Also, total work declined significantly across sets for the super-set protocol at 60° · s(-1) (from 2157 to 1707 J). Results indicate that a reciprocal action protocol provides torque maintenance during multiple sets of isokinetic training, both at slow and high velocities.

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244 Fatigue Rates of Vastus Medialis Oblique and Lateralis During Short-Arc Quadriceps Exercise

Cited by 2 publications

References 0 publications

Robot-assisted assessment of muscle strength

Robot-assisted assessment of muscle strength

Effects of antagonist pre-load on knee extensor isokinetic muscle performance

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