Isometric Assessment

We have an isometric contraction when the muscle contracts but because of an external resistance its length remains unchanged. 
The force expressed during the isometric contraction produces an increase of the muscle tension that can be easily estimated by a load cell
The isometric strenght assessment enables to investigate with ACCURACY and PRECISION some basic aspects of performances and muscular conditions. : 
Isometric maximum force 
Time of isometric muscular activation
Strenght unbalance among homologous and agonist/antagonist limbs
Resistance to an isometric maximal contraction
Resistance to a muscular strain

FEATURES OF ISOMETRIC ASSESSMENT:

- EASINESS OF CARRYING OUT
- REPEATITIVITY OF TEST
- SUBJECT SAFETY
- POST-INJURY FIRST FORCE EVALUATION

 

 Range of Tests

1 - MAX ISOMETRIC STRENGHT (maximum expression of voluntary Force), at different articular angles with total safety.


Assessments

- Max Isometric Force Peak (FMAX)
- Time to achieve the peak of maximum force. (T100)

 

Isometric assessment at the leg extension F Max chart

 

 

 

 

2 - EXPLOSIVE ISOMETRIC TEST: Test that investigates on isometric contraction carried out with maximum explosivity.


EVALUATIONS:
- Maximum Force Peak (F.MAX)
- Time to achieve the FMAX peak(T100)
- T30: time to achieve the 30% of FMAX Peak
- T50: time to achievep the 50% of FMAX Peak
- T90: time to achieve the 90% of FMAX Peak
 

 

Isometric explosive strenght test  Isometric explosive strenght test

 

 

 

3 - ISOMETRIC BALANCE TEST: This test compare isometric force values expressed by homologous limbs or in the same limb, by agonist/antagonist muscles. 

The comparison among the average values expressed by the symmetrical muscular groups, gives a precise indications about the existing unbalance and, subsequently, on the realised progresses.

The test determines the isometric force of each muscular group and the unbalance expressed in percentage value.

 

 

 

 

 

 

4 - ISOMETRIC RESISTENCE TEST:  Curve of force values in relation to contraction  time 


- FMAX peak and T100 (time spent to achieve the FMAX peak
- % of the total time in which the force has been greater than the 50% of FMAX
- % of the total time in which the force has been greater than the 90% of FMAX

 

  

 

 

 

5 - ISOMETRIC FATIGUE TEST: this test evaluates the capacity of the muscle to mantain a predetermined submaximal isometric strenght.

The test determines the fatigue resistance measuring the time in which the expressed force is remained inside the foreseen values.

The parameters to be set are the following:
- Force target
- Range of variation controlled by biofeedback.

 

Fatigue test  Fatigue charth

Preset Color