CN109872811A - A kind of construction method of human body thermoacclimatization training effect evaluation index - Google Patents
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Abstract
The present invention discloses a kind of construction method of human body thermoacclimatization training effect evaluation index, chooses five variables such as heart rate, rectal temperature, ear-drum temperature, hotness, RPE as analysis factor；Each variable is standardized, factorial analysis is carried out using SPSS software, chooses the factor of the initial characteristic values greater than 1 as common factor；Finally carry out the linear analysis of overall target staging hierarchy.The present invention reflects the thermoacclimatization training effect under different condition by unified index, and method is simple, versatile.
Description
Technical field
The invention belongs to low latitudes outdoor thermal environment technical fields, are related to a kind of human body thermoacclimatization training effect evaluation index
Construction method and its application.
Background technique
Hot environment is widely present in all trades and professions, and labourer's body temperature, heart rate, thermal sensation can be caused under high temperature environment by working
The variation of a series of physiology such as feel, tired degree and psychological parameter, and then influence the physical and mental health and operation safety of labour personnel.
Thermoacclimatization refers to that stable change is had occurred by the heat effect of certain frequency in the part physiological system of body, is embodied in
Body reaches a new level to hot reflexive regulatory function gradual perfection, various physiological functions.In recent years, both at home and abroad
Many scholars a large amount of research carried out to thermoacclimatization process, and find either bacterium, animal or people body after by thermostimulation
Interior heat stress proteins (Heat Stress Proteins, HSP), which synthesize, to be increased, and thus infers that the synthesis of heat stress proteins may
It is the major reason that thermoacclimatization is formed.After cell is by thermostimulation, specific gene can be activated, inhibits most of normal protein
Synthesis, formed HSP, to increase the intracorporal HSP content of machine.This responsing reaction of cell is to reduce in extreme heat
The damage being subject under environment.When human body obtains thermoacclimatization, intracellular heat stress proteins content is obviously increased, and incrementss
It is influenced of both heat intensity and heat effect time.
The forming process of thermoacclimatization can be divided into following three phases:
1. the primitive reaction stage: when body has just contacted hot environment, thermoregulatory system and Cardiovascular regulation system are still
Effective regulatory function cannot be played, causes body body temperature and heart rate quickly to increase, unstable blood pressure is fixed.
2. the compensatory laundering period: the thermoregulatory system and Cardiovascular regulation system function of body obtain a degree of change
It is kind.Amplitude of variation of the physiological parameters such as human rectum's temperature, skin temperature, heart rate and blood pressure after thermoacclimatization training reduces, and
And the output quantity of often diverting one's attention of often fighting is increase accordingly.Also with the adjustment of body each section circulating blood volume, renal blood flow is reduced thermoacclimatization
25-75%, hepatic blood flow are also accordingly reduced, and skin blood flow increases.Meanwhile therefore body perspiration ability can also enhance.
3. adjusting the consolidation phase: the thermoregulatory system and Cardiovascular regulation system function of body can adapt to current heat
Environment, and its nervous system and endocrine system also produce stable change.Body temperature and heart rate speedup reduce, rate of perspiration compared with
Previous stage slightly subtracts but sensibility increases, and the skin temperature threshold of perspiration reduces about 2 DEG C
By thermoacclimatization training, then the hot tolerance of human body can be improved, alleviate influence of the hot environment to human body.At present
In most thermoacclimatization training experiments, generally according to the individual events such as subject's rectal temperature, heart rate, hotness physiology or psychological indicator
Variation reflect thermoacclimatization training effect.But it can be had the following problems in thermoacclimatization training experiment using single index:
1. single index can only reflect the physiology or psychological characteristics of body in a certain respect, there is one-sidedness；
2. the dimension between different single indexs is different, there is incommensurability；
3. the result that different single indexs evaluate same test may be inconsistent.
Therefore, it is necessary to establish overall target easy to use by thermoacclimatization training experiment, can be widely applied
In various forms of thermoacclimatization training experiment effect assessments.But unified index there is no to reflect the thermoacclimatization under different condition at present
Training effect by the influence of each single index of thermoacclimatization training on body of the technique study of experiment, and then is established and combines life
The overall target of reason and psychological parameter becomes most scholars now and grinds to evaluate the thermoacclimatization training effect under different operating conditions
The focus studied carefully.
Summary of the invention
The purpose of the present invention is to provide a kind of construction method of human body thermoacclimatization training effect evaluation index and its application,
The construction method reflects the thermoacclimatization training effect under different condition by unified index, and method is simple, versatile.
In order to solve the above technical problems, technical scheme is as follows:
A kind of construction method of human body thermoacclimatization training effect evaluation index, it according to following step sequence successively into
Row:
(1) variable is chosen
Five variables such as heart rate, rectal temperature, ear-drum temperature, hotness, RPE are chosen as analysis factor；
(2) variable standardization
Each variable in step (1) is standardized, treatment process is as follows:
A. rectal temperature
SRTn=(RTn-RT0)/(39.5-RT0)
In formula, SRTnStandardization rectal temperature for subject at the n moment, value range are 0~1；RTnFor subject
In the rectal temperature at n moment, DEG C；RT0For the rectal temperature that subject carves at the beginning, DEG C；
B. ear-drum temperature
SETn=(ETn-ET0)/(39-ET0)
In formula, SETnIt is subject in the standardization ear-drum temperature at n moment, value range is 0~1；ETnFor subject
In the ear-drum temperature at n moment, DEG C；ET0For the ear-drum temperature that subject carves at the beginning, DEG C；
C. heart rate
SHRn=(HRn-HR0)/(180-HR0)
In formula, SHRnStandardization heart rate for subject at the n moment, value range are 0~1；HRnIt is subject in n
The heart rate at quarter, beats/min；HR0For the heart rate that subject carves at the beginning, beats/min；
D. hotness
STSn=(TSn-7)/6
In formula, STSnStandardization hotness for subject at the n moment, value range are 0~1；TSnIt is subject in n
The hotness at moment；
E.RPE
SRPEn=(RPEn-6)/14
In formula, SRPEnStandardization RPE for subject at the n moment, value range are 0~1；RPEnIt is subject in n
The RPE at moment；
(3) Factor Analysis
Factorial analysis is carried out using SPSS software, specific as follows:
A.KMO is examined and Bartlett sphericity is examined, and is analyzed original variable and is appropriate for factorial analysis；
Can B. communality be explained using the information of five variables of communality table analysis by the factor, analysis because
Son mentions
The general effect taken；
C. factor analysis chooses the factor of the initial characteristic values greater than 1 as common factor；
(4) overall target staging hierarchy
Utilize formula PSI=5 (Tren-Tre0)/(39.5-Tre0)+5(HRn-HR0)/(180-HR0) and D=22SRT+
21SET+20SHR+16STS+21SRPE calculates separately out subject's whole PSI value and D value during the experiment, and to D value
Regression analysis is carried out with PSI value, regression equation is D=6.99PSI+14.94 (R2=0.808), analysis therebetween whether line
Property it is related；
In formula, Tre0And HR0Rectal temperature and heart rate when being rigid contact hot environment respectively；TrenAnd HRnIt is sudden and violent respectively
Rectal temperature and heart rate when the time for being exposed to thermal environment is n；39.5 and 180 assume that the maximum that human body can reach is straight respectively
Intestines temperature value and heart rate value.
The present invention also provides a kind of applications of human body thermoacclimatization training effect evaluation index, it is applied to thermoacclimatization training
Effect assessment.The present invention is suitable for building human body thermoacclimatization training effect evaluation index, which further applies Studies of Human Body Heat
In the evaluation of acclimatization training effect.The construction method of human body thermoacclimatization training effect evaluation index provided by the invention and its application,
The construction method reflects the thermoacclimatization training effect under different condition by unified index, and construction method is simple, versatile.
Detailed description of the invention
Fig. 1 is regression curve of the overall target D about PSI in the embodiment of the present invention 1.
Fig. 2 is the D value figure of changing of thermoacclimatization training front and back a group subject in the embodiment of the present invention 2.
Fig. 3 is the D value figure of changing of thermoacclimatization training front and back b group subject in the embodiment of the present invention 2.
Fig. 4 is the D value figure of changing of thermoacclimatization training front and back c group subject in the embodiment of the present invention 2.
Fig. 5 is the D value figure of changing of thermoacclimatization training front and back d group subject in the embodiment of the present invention 2.
Fig. 6 is the D value figure of changing of thermoacclimatization training front and back e group subject in the embodiment of the present invention 2.
Specific embodiment
Technical solution of the present invention is further illustrated combined with specific embodiments below.
A kind of construction method of the human body thermoacclimatization training effect evaluation index of the invention of embodiment 1
(1) variable is chosen
Variable selection in overall target usually needs following several principles: variable selected by 1. is able to reflect research object
Most information；2. variable can change correspondingly when experiment condition changes；3. simple easily survey, have a wide range of application.By reality
Analysis is tested it is found that the physiologic variables for selection have: representing heart rate, systolic pressure and the diastolic pressure of cardiovascular system, represents body temperature
Rectal temperature, the ear-drum temperature, skin temperature of regulating system；Psychological variable has HSSI, hotness, thermal comfort, RPE.But due to
Systolic pressure, diastolic pressure, thermal comfort are influenced smaller by thermoacclimatization training, and skin temperature is not easy to measure, and HSSI questionnaire fills in complexity etc.
Reason does not meet variable selection principle, therefore not as the variable for constituting overall target.It is analyzed above, selection heart rate,
Five variables such as rectal temperature, ear-drum temperature, hotness, RPE carry out factorial analysis, establish overall target.(2) variable standardization
Since variable change is influenced by human body original state, and the dimension of each variable is different, therefore need to be by each variable
It is standardized.
Assuming that each accessible maximum value of physiological parameter is when human body is trained under high temperature environment: rectal temperature, 39.5 DEG C；
Ear-drum temperature, 39 DEG C；Heart rate, 180beats/min.Variable standardization is as follows:
1. rectal temperature
SRTn=(RTn-RT0)/(39.5-RT0) (1)
In formula, SRTnStandardization rectal temperature for subject at the n moment, value range are 0~1；RTnFor subject
In the rectal temperature at n moment, DEG C；RT0For the rectal temperature that subject carves at the beginning, DEG C.
2. ear-drum temperature
SETn=(ETn-ET0)/(39-ET0) (2)
In formula, SETnIt is subject in the standardization ear-drum temperature at n moment, value range is 0~1；ETnFor subject
In the ear-drum temperature at n moment, DEG C；ET0For the ear-drum temperature that subject carves at the beginning, DEG C.
3. heart rate
SHRn=(HRn-HR0)/(180-HR0) (3)
In formula, SHRnStandardization heart rate for subject at the n moment, value range are 0~1；HRnIt is subject in n
The heart rate at quarter, beats/min；HR0For the heart rate that subject carves at the beginning, beats/min.
4. hotness
STSn=(TSn-7)/6 (4)
In formula, STSnStandardization hotness for subject at the n moment, value range are 0~1；TSnIt is subject in n
The hotness at moment.
5.RPE
SRPEn=(RPEn-6)/14 (5)
In formula, SRPEnStandardization RPE for subject at the n moment, value range are 0~1；RPEnIt is subject in n
The RPE at moment.(3) Factor Analysis
Factorial analysis is carried out using SPSS software, process is as follows:
1.KMO is examined and Bartlett sphericity is examined
As can be seen that the value of KMO test statistics MSA is 0.736 from following table, show to have between original variable compared with
Strong correlation.Meanwhile Bartlett sphericity test statistics value is 1812.757, and Sig value is 0.000, is less than significant
Property it is horizontal, null hypothesis can be refused.In conclusion original variable is appropriate for factorial analysis.
2. communality
From communality table (following table) as can be seen that the most information of five variables can be explained by the factor, variable
Information loss is less, and the general effect for illustrating that the factor is extracted is more satisfactory.
3. factor analysis
For most researchers when carrying out factorial analysis, the general factor of the initial characteristic values greater than 1 of choosing is as common factor.From
As can be seen that the initial characteristic values of only the first two factor are greater than 1 in following table, and its postrotational variance contribution ratio is respectively
46.308%, 27.047%, cumulative proportion in ANOVA 73.355% illustrates that the two factors contain the big portion of original variable
Divide information.Therefore, the first two factor is chosen as main gene.
As can be seen that the first main gene has on rectal temperature, ear-drum temperature and heart rate from rotation component matrix table
Biggish loading coefficient, therefore the first main gene is named as physiological factor；Second main gene in hotness and RPE have compared with
Big loading coefficient, therefore the second main gene can be named as Mental factor.
The population variance of explanation
Rotate component matrix
4. factor score calculates
Factor score coefficient can be calculated by regression estimates method, as shown in the table.Show that the following factor obtains according to middle data
Divide calculation formula:
F1=0.387SRT+0.411SET+0.360SHR-0.223STS+0.068SRPE (6)
F2=-0.055SRT-0.131SET-0.069SHR+0.792STS+0.456SRPE (7)
In formula, F1 is physiological factor；F2 is Mental factor.
Composition score coefficient matrix
By the variance contribution ratio of two main genes in formula (5-8), (5-9) and upper table, overall target F is obtained:
F=(0.46F1+0.27F2)/0.73=0.63F1+0.37F2 (8)
In order to keep overall target simpler intuitive, F is mapped in 0~100 range, obtains last overall target D:
D=100* (F-Fmin)/(Fmax-Fmin)=63F1+37F2 (9)
Formula (5-8) and (5-9) are substituted into formula (5-11), show that the expression formula of D is as follows:
D=22SRT+21SET+20SHR+16STS+21SRPE (10) (4) overall target
Staging hierarchy
Utilize formula PSI=5 (Tren-Tre0)/(39.5-Tre0)+5(HRn-HR0)/(180-HR0) and D=22SRT+
21SET+20SHR+16STS+21SRPE calculates separately out subject's whole PSI value and D value during the experiment, and to D value
Regression analysis is carried out with PSI value, regression equation is D=6.99PSI+14.94 (R2=0.808), analysis therebetween have compared with
Strong linear dependence；
In formula, Tre0And HR0Rectal temperature and heart rate when being rigid contact hot environment respectively；TrenAnd HRnIt is sudden and violent respectively
Rectal temperature and heart rate when the time for being exposed to thermal environment is n；39.5 and 180 assume that the maximum that human body can reach is straight respectively
Intestines temperature value and heart rate value.
PSI grade scale is the PSI grade scale of the foundation such as Moran, which is widely used to human body physiological state
Monitoring.Relationship between overall target D and PSI according to the present invention, the grade scale of available overall target D, is shown in comprehensive
Close the grade scale table of index D.
As can be seen that the classification of overall target D provided by the present invention more refines from two tables, this is because comprehensive
Index D is capable of the thermal stress state of thoroughly evaluating human body, including physiology and psychological aspects, and PSI can only evaluate the physiology of human body
Stress state.
PSI grade scale
The grade scale of overall target D
A kind of application of the human body thermoacclimatization training effect evaluation index of embodiment 2
The present embodiment evaluates thermoacclimatization training effect using the evaluation index in embodiment 1, specific as follows:
A, five groups of subjects of b, c, d, e thermoacclimatization training before and after overall target D value with run duration change curve
(experiment the 1st day is indicated before training, indicate experiment the 10th day after training) as shown below.It can be seen from the figure that regardless of whether
By thermoacclimatization training, D value of the subject after movement starts in 15min has increase by a relatively large margin, with run duration
Extension, the increased amplitude of D value gradually slows down, and the relatively training of D value increasing degree is preceding more slow after acclimatization training.
According to the grade scale of overall target D, each group subject thermal stress state after movement before thermoacclimatization training
" weight " or " very heavy " is reached.But by thermoacclimatization training, D value of each group subject after movement has in various degree
Reduction, illustrate that thermoacclimatization training can weaken influence of the hot environment to human body.
It is influenced further to analyze the D value variation of five groups of subjects of a, b, c, d, e by thermoacclimatization training, using pairing sample
Whether the method that this t is examined examines five groups of subject's thermoacclimatization training front and back D value variations significant, as a result see the table below.As seen from table,
After thermoacclimatization training, have dropped 49.6% respectively before the relatively training of D value after five groups of subject motions of a, b, c, d, e, 20.0%,
38.9%, 23.5%, 38.2%, and in addition to b group, significantly reducing occurs in D value.It is above-mentioned statistics indicate that, in a, c, d, e etc.
The reduction that thermoacclimatization training on body thermal stress is carried out under four groups of operating conditions has remarkable result.
Table 5-8 thermoacclimatization training front and back, five groups of D values change paired-sample t test result
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (2)
1. a kind of construction method of human body thermoacclimatization training effect evaluation index, which is characterized in that according to following step sequence
Successively carry out:
(1) variable is chosen
Five variables such as heart rate, rectal temperature, ear-drum temperature, hotness, RPE are chosen as analysis factor；
(2) variable standardization
Each variable in step (1) is standardized, treatment process is as follows:
A. rectal temperature
SRTn=(RTn-RT0)/(39.5-RT0)
In formula, SRTnStandardization rectal temperature for subject at the n moment, value range are 0~1；RTnIt is subject in n
The rectal temperature at quarter, DEG C；RT0For the rectal temperature that subject carves at the beginning, DEG C；
B. ear-drum temperature
SETn=(ETn-ET0)/(39-ET0)
In formula, SETnIt is subject in the standardization ear-drum temperature at n moment, value range is 0~1；ETnIt is subject in n
The ear-drum temperature at quarter, DEG C；ET0For the ear-drum temperature that subject carves at the beginning, DEG C；
C. heart rate
SHRn=(HRn-HR0)/(180-HR0)
In formula, SHRnStandardization heart rate for subject at the n moment, value range are 0~1；HRnIt is subject at the n moment
Heart rate, beats/min；HR0For the heart rate that subject carves at the beginning, beats/min；
D. hotness
STSn=(TSn-7)/6
In formula, STSnStandardization hotness for subject at the n moment, value range are 0~1；TSnIt is subject at the n moment
Hotness；
E.RPE
SRPEn=(RPEn-6)/14
In formula, SRPEnStandardization RPE for subject at the n moment, value range are 0~1；RPEnIt is subject at the n moment
RPE；
(3) Factor Analysis
Factorial analysis is carried out using SPSS software, specific as follows:
A.KMO is examined and Bartlett sphericity is examined, and is analyzed original variable and is appropriate for factorial analysis；
Can B. communality be explained that analysis factor is mentioned using the information of five variables of communality table analysis by the factor
The general effect taken；
C. factor analysis chooses the factor of the initial characteristic values greater than 1 as common factor；
(4) overall target staging hierarchy
Utilize formula PSI=5 (Tren-Tre0)/(39.5-Tre0)+5(HRn-HR0)/(180-HR0)
And D=22SRT+21SET+20SHR+16STS+21SRPE, calculate separately out subject whole PSI during the experiment
Value and D value, and regression analysis is carried out to D value and PSI value, regression equation is D=6.99PSI+14.94 (R2=0.808) it, analyzes
Therebetween whether linearly related；
In formula, Tre0And HR0Rectal temperature and heart rate when being rigid contact hot environment respectively；TrenAnd HRnIt is exposed to respectively
Rectal temperature and heart rate when the time of thermal environment is n；39.5 and 180 assume that the maximum rectum temperature that human body can reach respectively
Angle value and heart rate value.
2. a kind of construction method of human body thermoacclimatization training effect evaluation index as described in claim 1 is imitated in thermoacclimatization training
Application in fruit evaluation.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110840414A (en) * | 2019-10-18 | 2020-02-28 | 天津大学 | Method for determining oral cavity temperature limit value in extreme thermal environment based on working efficiency |
| CN112843661A (en) * | 2020-12-31 | 2021-05-28 | 军事科学院军事医学研究院环境医学与作业医学研究所 | Heat training guidance system and method |
| CN112843661B (en) * | 2020-12-31 | 2021-09-21 | 军事科学院军事医学研究院环境医学与作业医学研究所 | Heat training guidance system and method |
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