JP6480812B2 - Weight scale and growth peak judgment method - Google Patents

Description

  The present invention relates to a weight scale and a growth peak determination method capable of determining the growth peak age of a person to be weighed.

  Height growth rates peak at about 12 years for girls and about 14 for boys. Height growth spurts occur in men between the ages of 13 and 15 years, and are expected to grow by more than 10 cm in years when growth rates peak. The girl's growth spurt begins around the age of 11 and grows by 4 cm in the year when the growth rate reaches its peak, and is almost complete by the age of 13.

  If puberty is delayed, height growth may slow down significantly. If the delay is not pathological, it is later caught up by adolescent growth spurts and the height crosses the percentile line until a genetically determined height is reached.

  At the age of 18, boys still grew less than 2.54cm, but girls had little room for growth, with 99% of the growth being completed. A girl with premature puberty (before the age of 6 and a half years) reaches menarche and develops a growth spurt early, and eventually the growth plate closes early, resulting in a short stature.

  It has been found that the increase in bone density coincides with the period when the growth rate of height is high (growth peak), and excessive diet and intense exercise occur without sufficient weight gain at the peak growth period. Continuing may cause fatigue fractures in the future.

  If the growth peak does not arrive, girls will not have menarche, and if the final height associated with the growth peak can be predicted, training will be possible according to the position corresponding to the height, especially for athletes. .

  The influence of external factors on the age of the growth peak is not reported, and the growth peak becomes a biological parameter as an index of maturity (Non-Patent Document 1). A graphic method has been proposed as a method for calculating the growth peak, but it is difficult to derive an objective and precise age of the growth peak (Non-patent Documents 2 and 3). Therefore, it is now recommended to record the change of height over time by periodic height measurement and predict the occurrence of growth peaks. However, it is not always easy to measure the height regularly for reasons such as measuring equipment and time constraints.

Malina, R M .: Physical activity and training: effects on stature and the adolescent growth spurt. Medicine and Science in Sports and Exercise, 26, 759-766, 1994. Tanner, J M., Whitehouse, R H. and Takaishi, M .: Standard from birth to maturity for height, weight, height velocity and weight velocity-British children 1965. Archives of Disease in Childhood, 41, 454-471, 1966 . Masahiro Takaishi, Seiko Omori, Atsushi Eguchi, Ryoko Fujita: Studies on the pattern of physical development in adolescence Part 1. The height growth rate and the body weight growth rate of boys.Research on Child Health, 26, 57-63, 1968.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a growth peak determination method capable of predicting the growth peak time by a simple means and a scale to which the growth peak determination method is applied.

  The weight scale according to the present invention displays a platform part on which a person to be weighed is placed, a weighing part in which the weight of the person to be weighed on the platform part is measured in kilograms, and a weight value measured by the weighing. The weight display section, the age input section in which the age at the time of measurement of the patient is input as the age of the period from the date of birth to the date at the time of measurement, and multiple times during the growth process of the patient by the age input section A body data storage unit in which the age input over time is stored as age data, and a weight value measured a plurality of times during the growth process of the person being measured by the measuring unit is stored as weight data And the age at the first time point, the weight at the first time point, and the second time point two years after the first time point, based on the age data and the weight data stored in the body data storage unit The age at the second time point, the age at the third time point three years after the first time point, and the weight at the third time point are extracted and between the second time point and the third time point If the weight gained per unit year is 1.13 times greater than the weight gained per unit year between the first time point and the second time point, the height of the person weighed per unit year will increase A growth peak in which the rate is high has arrived at the third time point, and the growth peak determination unit determines that the third time point is the growth peak age. A growth peak display unit that displays the growth peak age when it is determined that a peak has arrived.

  The growth peak determination method according to the present invention includes a first measurement step of measuring the age and weight of the subject at the first time point, and the age and weight of the subject at the second time point two years after the first time point. Per unit year between the second measurement step, the third measurement step to measure the age and weight of the person to be weighed at the third time point three years after the first time point, and the second time point and the third time point When the weight gained in the first year is 1.13 times or more than the weight gained per unit year between the first time point and the second time point, the rate of increase in the height of the person being measured per unit year is high. A growth peak determining step for determining that the person to be weighed has arrived at the third time point.

  According to the present invention, the growth peak time can be predicted by a simple means.

It is a figure explaining the outline of the weight scale 900 concerning this invention. It is a figure explaining the outline | summary of a weight measurement program. It is a figure which shows the annual growth rate (cm / year) in a Japanese girl. It is a figure which shows the annual weight gain rate (kg / year) in a Japanese girl. It is a figure which shows the height and weight increase with respect to age in the Japanese girl as a typical example. It is a figure which shows the growth rate (solid line) and weight gain rate (dotted line) with respect to age in the girl of the subject as a representative example. It is a figure which considers the change of the body weight gain rate just before the growth peak in the girl who is a typical example.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. However, the embodiments are for facilitating understanding of the principle of the present invention, and the scope of the present invention is as follows. The present invention is not limited to the embodiments, and other embodiments in which those skilled in the art appropriately replace the configurations of the following embodiments are also included in the scope of the present invention.

  The present inventor is widely used in homes and schools, paying attention to the weight that can be easily measured, and calculating the growth peak easily and accurately by measuring the weight over time in adolescence in healthy individuals We have found that this is possible as a new finding, and have completed the present invention based on such facts.

  Growth peak means the period when the growth rate of height is the highest except infancy. For example, if you add to the graph how many centimeters your height has increased, in the case of a Japanese girl, it is 6 to 10 cm (average 8 cm) per year (standard deviation is about 1 cm). People reach a growth peak. Since height is usually measured once to several times a year, the age of the growth peak is a concept considered in terms of points.

  In the growth peak determination method according to the present invention, the age and body weight of the person to be measured at the first time point are measured in the first measurement process, and the person to be weighed at the second time point two years after the first time point in the second measurement process. The age and weight of the subject are measured, and the age and weight of the person to be weighed at the third time point three years after the first time point are measured in the third measurement step. As shown in the examples described below, the inventor increased the weight gained per unit year between the second time point and the third time point per unit year between the first time point and the second time point. When the weight is 1.13 times or more than the measured weight, it is earnestly determined that the growth peak in which the ratio of the height of the person to be measured per unit year increases is that the person to be weighed has arrived at the third time point. Found by research.

  Next, the scale 900 according to the present invention will be described. As shown in FIG. 1, the weight scale includes a platform 100 on which a person to be weighed is placed, a weighing unit 110 in which the weight of the person to be weighed on the platform is measured in kilograms, and a weight value obtained by weighing. Is displayed, a growth peak display unit 130 on which the growth peak age is displayed, and a control unit 200.

  The weight scale 900 has a control unit 200 inside the platform unit 100. The control unit 200 controls the overall operation of the weight scale 900, and includes a microprocessor 210, a RAM 220, a ROM 230, an amplifier 240, an A / D converter 250, a display control unit 260, a body data storage unit 270, a growth peak. It comprises a determination unit 280 and an internal hard disk drive 290.

  After the weight scale 900 is activated, the microprocessor 210 reads the weight measurement program from the internal hard disk drive (HDD) 290 onto the RAM 220, and executes the weight measurement program. The ROM 230 stores a program and the like for realizing the basic functions of the weight scale 900.

  The amplifier 240 amplifies the voltage signal representing the weight measurement value generated by the weighing unit 110, and the A / D converter 250 processes the amplified analog voltage signal in the microprocessor 210. Is converted into a digital signal. The display control unit 260 outputs the weight on the weight display unit 120.

  The age input unit 150 includes a numeric keypad, a confirmation key, a cursor key, a clear key, and the like. The age at the time of measurement of the person to be measured from the age input unit 150 is the age of the period from the date of birth to the date at the time of measurement. Is entered as

  The body data storage unit 270 stores the age input by the age input unit 150 and the weight measurement value corresponding to the age. The growth peak determination unit 280 includes the age at the first time point and the weight at the first time point stored in the body data storage unit 270, the age at the second time point two years after the first time point, and the second time point. The body weight, the age at the third time point three years after the first time point, and the weight at the third time point are extracted. And when the weight gained per unit year between the second time point and the third time point is 1.13 times or more than the weight gained per unit year between the first time point and the second time point It is determined that the growth peak has arrived at the third time point and the third time point is the growth peak age. Then, the display control unit 260 displays and outputs the arrival of the growth peak on the growth peak display unit 130.

  The outline of the weight measurement program executed by the microprocessor 210 will be described with reference to the flowchart of FIG. The microprocessor 210 executes the weight weighing program immediately after the power of the weight scale 900 is turned on. First, the person to be weighed operates the numeric keypad, confirmation key, etc. of the age input unit 150 to input the age (S1). Age is entered as the age of the period from the date of birth to the date at the time of measurement.

  Next, the input age is stored in the body data storage unit 270 (S2), and then prompted to be placed on the platform 100 by voice guidance or signal display (S3).

  It is determined whether or not the person to be weighed is placed on the platform 100 due to the magnitude of the measurement value output from the measurement unit 110 being equal to or greater than a predetermined value (S4). If not (NO in S4), the process remains as it is in S4. If it is on (YES in S4), the weight is measured by the measuring unit (S5), and the measured weight is displayed on the weight display unit. The displayed weight is stored in the body data storage unit 270 (S7).

  Thereafter, the growth peak determination unit 280 determines whether or not a growth peak has arrived (S8). If the growth peak has not arrived (NO in S8), the process remains as it is in S8, and if the growth peak has arrived (YES in S8), the growth peak is displayed on the growth peak display unit 130. It is displayed (S9).

  As described above, according to the present invention, there is a remarkable advantage that a growth peak is predicted only by measuring the weight with a weight scale without measuring the height. There are few opportunities to measure height, but if you try to measure weight, you can measure it every day, so you can easily predict the growth peak. According to the present invention, it is possible to instruct the continuation of an appropriate diet without performing an excessive diet or the like in the vicinity of the growth peak.

In addition, embodiment of this invention is not limited to the above-mentioned structure. The weight scale 900 can also include an menstrual age prediction unit that predicts the age of menarche of a subject and an menstrual age display unit that displays the predicted age of menarche. The menopause age prediction unit predicts the subject's menopause age based on the following formula.
(Equation 1)
Menarche age = 7.55 + 0.52 × (growth peak age) −0.08 × (kg body weight gain per year immediately before growth peak age)

  At present, the average age of menarche is 12 years old, and the standard deviation is almost one year, so the possibility of menarche not coming by 14 years old can be grasped at 13 years of age, and chronic weight loss is poor. It becomes possible to avoid the delay in the arrival of menarche by dietary intervention. In addition, by controlling the weight gain range, it is possible to improve the height growth range by devising the menarche age.

Further, the embodiment of the present invention is not limited to the above-described configuration, and the weight scale 900 includes a final height prediction unit that predicts the final height of the subject, and a final height display unit that displays the predicted menstrual age. It is also possible to have The final height predicting unit predicts the final height of the subject based on the following formula.
(Equation 2)
Height increase from height to final height at growth peak age = 6.84 + 0.50 x (kg body weight gain per year immediately before growth peak age) + 1.48 x (growth peak age)

  According to the present invention, the final height related to the growth peak can be predicted, and for example, training corresponding to the height such as volleyball player training can be performed.

  FIG. 3 shows the annual growth rate (cm / year) of Japanese girls. Among the 144 tall women (+ 2SD and above, 169cm and above) who are 18- to 22-year-old women who can cooperate in research, we have all the records of the height and weight every year from the first grade of elementary school until the time of the survey. Dunnett's multiple comparisons were made regarding the 115 annual height and weight gains. Each individual's peak growth time is the same as the first year, and the growth peak rate is “0 year”. The height increase rate is plotted on the horizontal axis every year, and the height increases two years before the peak. Is plotted as “-2” and “-1” years as one year ago. The number of samples is about 115 people, but some of them do not contain data, so there are 113 and 114 years. As shown in FIG. 3, the average height increase from the last two years to one year ago is 6.30 cm, and the growth peak is 8.79 cm (standard deviations are 0.16965 and 0.18965, respectively). The annual increase from 5.80 cm to 6.10 cm is 0.3, but at the growth peak, the increase suddenly increases from 6.10 cm to 8.79 cm to 2.69 cm.

  FIG. 4 is a diagram showing the annual weight gain rate (kg / year) in Japanese girls. The growth peak time is plotted as “0 years”, the weight gain rate is plotted on the horizontal axis every year, the height increase 2 years before the peak is plotted as “-2”, and the year before as “-1” years. is there. The number of samples is about 115 people, but some of them are 112, 114 years because some of them do not contain data. As shown in FIG. 4, it is understood that weight gain is also maximized at the time of the growth peak. Increases from 3.33 kg to 3.93 kg and 0.6 kg are observed, and increases from 3.93 kg to 5.41 kg and 1.48 kg are observed.

  FIG. 5 is a diagram showing an increase in height and weight with respect to age in a Japanese girl as a representative example. As shown in FIG. 5, it is understood that a rapid increase in body weight coincides with the rapid increase in height.

  FIG. 6 is a diagram showing a growth rate (solid line) and a weight gain rate (dotted line) with respect to age in a female girl as a representative example. Measurements were taken from 7 to 18 years old. As shown in FIG. 6, the weight / year slope increases compared to the others in one year from the age of 12.1 to 13.1 years. The girl's height peak was 13.1 years. Weight gain / year from 11.1 to 12.1 years is 0.9kg increase, weight gain / year from 12.1 to 13.1 years is 9.2kg, weight gain from 13.1 to 14.1 years / year is -10.1kg It is. It is understood that the rate of increase is more than 10 times at 9.2 / 0.9 in the last year.

  FIG. 7 is a diagram for considering the change in the rate of weight gain immediately before the growth peak in an individual girl as a representative example. As shown in FIG. 7, the growth peak rapidly increased in both height and weight in one year, and decreased rapidly in the next year. Thus, in the case of a child in the growth period, it is suggested that it is necessary to detect the rise of height and weight at an early stage and to try to gain weight. Since the frequency of measuring the height is not high, this means that the peak is missed in the height measurement once a year. Since the weight can be accurately measured at home even if it is intended to measure, the present invention has a great advantage in terms of child growth because it can easily and accurately detect the arrival of the growth peak.

Next, out of 144 tall women (+ 2SD and above, 169cm and above) who are 18- to 22-year-old women who can cooperate in research, all the records of annual height and weight from the first grade of elementary school to the present at the time of the survey are all Dunnett's multiple comparisons were conducted regarding the annual height and weight gains of 115 people. As a result, it was found that the final height increases as the weight gain increases. Since a significant relationship was found between annual weight gain and final height during the year immediately before the peak of growth, the top 4 minutes among 144 people who had a large increase in height between 3rd grade and 3rd grade The formula for predicting the final height was derived by regression analysis from both of the 28 persons who corresponded to No.1.
(Equation 3)
Height increase from height to final height at growth peak age = 6.84 + 0.50 x (kg body weight gain per year immediately before growth peak age) + 1.48 x (growth peak age)

Similarly, a formula for predicting the age of menarche was derived by regression analysis.
(Equation 4)
Menarche age = 7.55 + 0.52 × (growth peak age) −0.08 × (kg body weight gain per year immediately before growth peak age)

  It can be used for training plans for athletes.

100: platform unit 110: weighing unit 120: weight display unit 130: growth peak display unit 150: age input unit 200: control unit 210: microprocessor 220: RAM
230: ROM
240: Amplifier 250: A / D converter 260: Display control unit 270: Body data storage unit 280: Growth peak determination unit 290: Internal HDD
900: Weight scale

Claims (5)

A platform on which a person to be weighed is placed;
A weighing unit that weighs the weight of the person to be weighed on the platform unit;
A weight display section for displaying a weight value by weighing, and
An age input unit in which the age at the time of measurement of the subject is input as the age of the period from the date of birth to the date at the time of measurement;
The age input by the age input unit over a plurality of times during the growth process of the subject is stored as age data, and the weight measured by the measurement unit over the plurality of times during the growth process of the subject. A physical data storage unit in which the measured value is stored as weight data;
Based on the age data and the weight data stored by the body data storage unit,
The age at the first time point, the weight at the first time point,
Age at the second time point, two years after the first time point, weight at the second time point,
The age at the third time point three years after the first time point, the weight at the third time point,
Extract
The weight gained per unit year between the second time point and the third time point is
If it is 1.13 times more than the weight gained per unit year between the first time point and the second time point,
A growth peak determination unit that determines that the measurement peak has arrived at the third time point and the third time point is the growth peak age;
When it is determined that the growth peak of the person to be measured has arrived by the growth peak determination unit, a growth peak display unit that displays the growth peak age,
A weight scale characterized by comprising:   The weight scale according to claim 1, wherein the person to be weighed is a Japanese girl of teenage age. A menopause age prediction unit for predicting the menarche age of the subject based on the following formula;
(Equation 1)
Menarche age = 7.55 + 0.52 × (growth peak age) −0.08 × (kg body weight gain per year immediately before growth peak age)
A menopause age display section that displays the predicted menarche age,
The weight scale according to claim 2, comprising: Predicting the amount of height increase from the height at the growth peak age of the subject to the final height based on the following formula, thereby predicting the final height of the subject,
(Equation 2)
Height increase from height to final height at growth peak age = 6.84 + 0.50 x (kg body weight gain per year immediately before growth peak age) + 1.48 x (growth peak age)
A final height display where the predicted final height is displayed;
The weight scale according to any one of claims 1 to 3, characterized by comprising: A first measuring step for measuring the age and weight of the subject at a first time point;
A second measuring step of measuring the age and weight of the person to be measured at a second time point two years after the first time point;
A third measuring step for measuring the age and weight of the person to be weighed at a third time point three years after the first time point;
When the weight gained per unit year between the second time point and the third time point is 1.13 times or more than the weight gained per unit year between the first time point and the second time point, A growth peak determination step in which a growth peak at which the height of the person to be weighed per unit year increases is determined to have arrived at the third time point,
A growth peak determination method characterized by comprising: