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).

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In the case of testing only one side then the opposite side should be used as a reference (this is not the case in athletes who use one side preferentially over the other e.g. Javelin). 

Imbalance of strength of up to 10% can be considered normal.

Imbalance between 10 and 20% is possibly abnormal (with Injury this is considered probably abnormal).

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Contractional Work:

All described in standard international units Joules (J) which is a measure of energy and work (rather than force). It is equal to the energy expended (or work done) in applying a force of one newton through a distance of one metre (1 newton metre or N·m), 

A measure of the energy expended by the muscle/s under test and considered by some authorities to reflect endurance. However, difficulties in assessing the importance of strength (or lack of) and endurance during the interpretation of these results makes their use questionable for research purposes but good for rehabilitation.

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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 deficit map red areas show problems whilst blue areas are OK.

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