What are the main methods of muscle strength test?

Muscle strength testing methods mainly include unarmed muscle strength examination and instrument examination.

First, unarmed muscle strength examination

The unarmed muscle strength examination is an examination method that the examiner uses his own hands, relies on his own skills and judgment, and judges whether the muscle strength is normal and its grade by observing the active range of limbs and feeling the strength of muscle contraction according to certain standards. It can only show that the size of muscle strength cannot represent the endurance of muscle contraction.

The manual examination and muscle strength grading system commonly used in clinic was put forward by K.W.Lovett in 19 16. The specific operation has been modified since then, but its principle has not changed. This method enables the tested muscles to make standard test movements in a certain posture and observe their ability to complete the movements. The tester applies resistance or assistance by hand.

Second, the instrument inspection

When the muscle strength exceeds level 3, in order to make a more detailed quantitative evaluation, it is necessary to test the muscle strength with special instruments. There are different testing methods according to the different ways of muscle contraction, including isometric muscle strength test, isotonic muscle strength test and isokinetic muscle strength test.

Commonly used methods are as follows:

1, isometric muscle strength examination

The isometric contraction strength of muscle or muscle group is measured by dynamometer in standard posture.

2, isotonic muscle strength examination.

That is, to measure the maximum resistance that can be overcome when muscles perform isotonic contraction to make joints move in a full range. The maximum resistance of 1 movement is called 1 movement, and the maximum resistance that can be overcome by completing 10 continuous movement (10RM). The appropriate load and the increase of each test load should be estimated during measurement.

Avoid muscle fatigue caused by repeated tests and affect the test results. Exercise load can be carried out by dumbbells, sandbags and weight-bearing exercisers with quantitative weight. This method is rarely used in rehabilitation medicine.

3. Isokinetic muscle strength examination

It is carried out with a Cybex isokinetic dynamometer equipped with a computer. When testing, the limb drives the lever of the instrument to make a large reciprocating motion. The speed of movement is preset by the instrument, and muscle strength can not accelerate the movement, but only increase muscle tension and torque output.

The change of this moment is recorded by the instrument, and the change of joint angle is recorded synchronously, drawn into a double derivative curve, and the data is recorded automatically. This isokinetic testing method is accurate and reasonable, and can provide all kinds of data, which has become a good means to check muscle function and study its mechanical properties.

Extended data

Muscle strength refers to the ability of muscles or muscle groups to produce bovine tension, which leads to static or dynamic contraction, and can also be regarded as the strength produced by muscle contraction. Muscle strength measurement is an important content of rehabilitation evaluation and an important method of muscle function evaluation.

General muscle strength is divided into the following 0-5 levels and * * * 6 levels:

Level 0 is completely paralyzed, and no muscle contraction can be detected.

Grade 1 only muscle contraction is detected, and no movement can be generated.

Secondary limbs can move in parallel on the bed, but they can't resist their own gravity, that is, they can't get out of bed.

The third limb can overcome gravity and lift off the bed surface, but it can't resist resistance.

Level 4 limbs can do exercises against external resistance, but not completely.

Grade 5 muscle strength is normal.

Purpose and significance of evaluation:

1, muscle strength evaluation can help to judge whether there is muscle weakness and the scope and degree of muscle weakness.

2. Find the reason of low muscle strength.

3. To provide basis for making treatment and training plan.

4. Test the effect of treatment and training.

Baidu encyclopedia-muscle strength