Isokinetics.net

Tag: isokinetic

  • Specificity To Sports

    It is generally accepted that testing muscle performance isokinetically is not directly related to function. It would seem obvious that movements performed at constant angular velocity are completely unrelated to those seen in most activities particularly sports where rapid periods of acceleration are followed by high speed limb movements which can not be reproduced by…

  • Reproducibility

    In 1985 Mayhew and Rothstein published work on measurement of muscle performance with instruments. In their book emphasis was placed upon the issues of reproducibility and validity. Most of the problem have now been solved, however, a few have not been circumvented. Advances in engineering and computer science have made systems more versatile and much…

  • Reliability

    The reliability of isokinetic dynamometers is extremely high. The studies which have examined the accuracy of peak torque, work and power have shown correlation coefficients between 0.93 and 0.99 (Magnusson et al. 1990, Montgomery et al. 1989 Bemben et al.1989 are just a few of the independent articles available on this topic). The reliability of…

  • General Interpretation

    Irrespective of the joint/muscle system involved there are some basic principles which form a basis for interpretation. These are discussed in a lot of studies but are best described in Sapega (1990). Strength: In the case of testing only one side then the opposite side should be used as a reference (this is not the…

  • Isomap

    Biodex systems 3 and 4 use Isomap as a type of report. In essence an isomap looks at torque and position like an ordinary MAP curve but it then adds speed (3 speeds are tested and shown) to the equation which produces a coloured ‘map’ showing deficits in strength or speed production both related to angle. In the…

  • How is Isokinetic Resistance Created?

    Modern isokinetics machines use several components to create isokinetic resistance. Apart from the base of the machine and chair/bed to perform tests/exercises from the main component of the modern isokinetic machine is the dynamometer. This is the part of the machine that does all of the work and is by far the most expensive piece. It…

  • Contraindications

    Please note this is not an extensive list only a guide. Caution must be taken as some forms of isokinetic testing / exercising are harder than others. Hence a form of test / exercise that may be appropriate for one individual may not be appropriate to another. Prudent judgment should be used. Absolute Non united…

  • Protocols

    For Specific protocols please see the practical section/s. Here each movement at each joint has it’s own specific protocols (towards the middle of the page after the set up section). Warm up  An initial warm up, including stretching and gentle cardiovascular work, should be performed for 15 minutes prior to the use of the isokinetic…

  • What is Isokinetic?

    Isokinetic (n)  is a term used to describe a type of movement or exercise. Isokinetic or Isokinetics Definition: The word isokinetic is most commonly used in sports science and medicine. In these settings isokinetic defines a type of exercise or movement. Translated literally isokinetic (i·so·ki·net·ic pronounced ī’sō-kə-nĕt’ĭk) means movement at a constant speed.  The key…

  • Concentric

    Concnetric (n)  con·cen·tric is a term used to describe a type of movement or exercise. Concentric Definition: The word concentric is most commonly used in sports science and medicine. In these settings concentric defines a type of exercise or movement. Translated literally concentric means towards the centre.   This type of contraction occurs when the tension generated within amuscle is sufficient to overcome…