RU2355289C1 - Method for muscle strength determination - Google Patents

Abstract

FIELD: medicine, neurology.

SUBSTANCE: strength of iliopsoas muscle (IPM) is measured using balance, on which platform is situated with stool of known weight m₁. Patient of known weight m₂ seats on the stool with flat load of known weight m₃ on his head. His left leg rests on the platform, and his right leg bears against examiner's hand by the knee; isometric tension of IPM is exercised to flex the hip; 90° angle between the hip and the body being constant. Patient's lower leg and hip muscles are relaxed. In such patient position and such force, right leg IPM maximum strength m_max of three attempts is registered on the scale. In a similar manner, left leg IPM maximum strength m_max is registered on the balance, and IPM strength per 1 kg patient's weight is calculated by expression:

. If the values are: right <0.169 and left <0.186, then IPM strength is stated below normal; if the values are 0.374 and 0.382 respectively, IPM strength is stated above normal.

EFFECT: technique improvement.

2 ex, 1 tbl

Description

The invention relates to medicine, specifically to neurology, sports medicine, physiotherapy, and relates to methods for determining muscle strength.

A known method of determining muscle strength by the method of deadlift using the apparatus DS 200 [1]. The essence of the method is as follows: the patient stands on the bandwagon with a hook on which the chain is secured from the dynamometer, the legs must be straightened, the body is bent and the hands grasp the device’s handles at the knees, the patient slowly unbends and focuses on stretching the device’s chain. Thus, the strength of the muscles of the extensor back is determined. However, this method does not allow to determine the strength of the iliopsoas muscle (PPM).

The task of the invention is to determine the strength of the iliopsoas muscle.

The task is achieved in that the strength of the PPM is measured by weights on which there is a platform with a chair without a back of known mass m ₁ , a patient with a known mass m ₂ occupies a sitting position on a chair with a flat object of known mass m ₃ on the head to maintain the initial vertical position of the body at the moment of determining the PPM strength, the left leg is on the platform, the right leg with the studied muscle rests with the knee in the researcher’s hand and exercises an isometric effort upward, the angle between the trunk and thigh is 90 °, the muscles are bare and relaxed, on the scales register the highest value of the PPM strength of the right leg

m _max from three attempts in the conditions of holding a flat object on the head, thus measure the largest PPM strength of the left leg, calculate the PPM strength per 1 kg of patient weight according to the formula

and if the value on the right is less than 0.169 and on the left is less than 0.186, the PPM strength is determined below the norm, and if the value on the right is more than 0.374 and the left is more than 0.382, the PPM strength is above the norm.

To justify the proposed method, the PPM strength was measured in 18 people 36.3 ± 2.0 years old, weighing 77.7 ± 3.5 kg, excluding gender. Summarized data are presented in the table.

For a better understanding of the essence of the method, we offer specific examples:

Example 1. Patient Ch., 26 years old, candidate for master of sports in swimming, normosthenic physique, weight - 70.6 kg, height 174 cm. No significant deviations were found from organs and systems. When measuring PPM three times on the right, the maximum value on a VMEN-150 type balance (registration certificate - FS No. 02012005 / 2377-06 dated 01/19/2006) is 112.75 kg, on the left - 106.05 kg, m ₁ = 5.950 kg - the mass of a chair with a platform, m ₂ = 70.6 kg — the patient’s mass, m ₃ = 0.1 kg — the mass of a flat object for the head.

F (kg force) on the right = 112.75- (5.950 + 70.6 + 0.1) = 36.1

F (kg force) left = 106.05- (5.950 + 70.6 + 0.1) = 29.4

F (kg force / kg weight) right = 36.1 / 70.6 = 0.511

F (kg force / kg weight) left = 29.4 / 70.6 = 0.416

Conclusion For athlete Ch., The PPM strength values per 1 kg of weight exceed the upper limit of the established range of the norm of the right leg (by 37%) and the left leg (by 9%), which indicates the strength of the PPM above the norm on the right and left, probably due to regular training in swimming.

Example 2. Patient D., 46 years old, regularly involved in various sports, normosthenic physique, weight 82 kg, height 168 cm. Complains of pain in the lumbar region radiating to the right thigh with minor or moderate physical exertion, arose two weeks ago, three months before the examination, she was operated on for an abscess of the right kidney. Objectively: in the region of the right hypochondrium, the postoperative suture healed by primary intention, pain of the II degree of projection of the periarticular tissues of the intervertebral joints on the right L _I- L _II , L _II- L _III , L _III- L _IV , violation of synergistic coordination of the divided muscles was not detected, range of motion in the lumbar region is full, with extension from a bent position forward in the middle of the movement, pain in the lumbar region is noted. When measuring the MRP of the right leg three times, the maximum value on the type balance, as in example 1, is 101.05 kg, the left leg is 124.05 kg, m ₁ = 5.950 kg is the mass of the chair with the platform, m ₂ = 82 kg is the patient’s weight , m ₃ = 0.1 kg is the mass of a flat object for the head.

F (kg force) right = 101.05- (5.950 + 82 + 0.1) = 13

F (kg force) left = 124.05- (5.950 + 82 + 0.1) = 36

F (kg force / kg weight) right = 13/82 = 0.158

F (kg force / kg weight) left = 36/82 = 0.439

The strength of the PPM per 1 kg of patient weight on the right is less than the lower limit of the established norm (by 7%), which corresponds to its weakness. The strength of the PPM per 1 kg of patient weight on the left exceeds the upper limit of the established norm (by 15%), which indicates its good development in the patient, probably in connection with sports.

Based on the measurements, the patient’s diagnosis: Lumbar ischialgia with initial neurodystrophic manifestations in the area of periarticular tissues of the intervertebral joints L _I- L _II , L _II- L _III , L _III- L _IV on the right, due to weakness of the iliopsoas muscle from the same side due to surgery on the right kidney.

Thus, the inventive method can be used in neurology, sports medicine and physiotherapy to measure the strength of the iliopsoas muscle.

Indicators of the iliopsoas muscle. Indicators On right Left F (kg force / kg weight), M ± m 0.271 ± 0.024 0.284 ± 0.023 Normal Zone (± 1σ) 0.169-0.374 0.186-0.382

Literature

1. Ivanov S.M. Medical supervision and physiotherapy exercises. - M.: Medicine. - 1970. - 472 p.

Claims (1)

A method for determining the strength of the iliopsoas muscle, characterized in that the strength of the iliopsoas muscle (PPM) is measured by weights on which there is a platform with a chair without a back of a known mass m ₁ , a patient with a known mass m ₂ occupies a sitting position on a chair with a flat object of known mass m ₃ on the head, while the left leg is on the platform, the right leg with the help of the MRP rests the knee in the researcher’s hand and carries out the isometric tension of the MRP to bend the hip, keeping the angle between the trunk and thigh 90 °, the muscles of the leg and the patient’s hips are relaxed, in such a position and with such a patient’s effort, the highest value of the right leg power PPM m _max from three attempts is recorded on the scales, the largest value of the left leg power is recorded on the scales, the PPM force per 1 kg of patient weight is calculated by the formula:

and if the value on the right is less than 0.169 and on the left is less than 0.186, the PPM strength is determined below the norm, and if the value on the right is more than 0.374 and the left is more than 0.382, the PPM strength is above the norm.