Background: Physical fitness tests are widely used to assess endurance,sprint ability,coordination and/or strength.The objective of the present study was to analyze the degree to which the results of the Bundeswehr Ba...Background: Physical fitness tests are widely used to assess endurance,sprint ability,coordination and/or strength.The objective of the present study was to analyze the degree to which the results of the Bundeswehr Basis Fitness Test(BFT)–a physical fitness test comprising a sprint test(11×10-m shuttle test),a flexed-arm hang test and a 1000-m run–are consistent with the output measured during a bicycle ergometer test.The number of false-positive and falsenegative results with regard to the assessment of physical fitness were also examined.Methods: As part of a retrospective study,health assessments from 323 reenlistment examinations were evaluated regarding the output measured during a bicycle ergometer test and compared with the BFT results of the candidates.Results: Overall,a good correlation was shown between the bicycle ergometer test results and the results achieved in the BFT disciplines.All three disciplines of the BFT showed a highly significant correlation with the relative output achieved during the bicycle ergometer test(P<0.001),and also,the overall BFT score was highly significantly correlated(P<0.001).The overall rate of false-positive and false-negative results was 4.0%.Conclusion: The BFT results measured in the three physical fitness test items were highly correlated with the output measured during the bicycle ergometer tests.The rate of false-positive and false-negative results was low.The test items thus represent an appropriate measurement instrument because the test items require few equipment and less time.Additionally,a large number of subjects can be assessed.We suggest that it would be more useful to assess the physical fitness of this special group exclusively on the basis of the BFT instead of using the bicycle ergometer test.展开更多
The physical health level of adolescents is related to the future of the motherland and the great rejuvenation of the Chinese nation.Through literature review,induction method,and logical analysis,this paper analyzes ...The physical health level of adolescents is related to the future of the motherland and the great rejuvenation of the Chinese nation.Through literature review,induction method,and logical analysis,this paper analyzes the policies related to students’physical health,explains the current situation of physical health testing of students in China,summarizes the problems that occur in the process of physical health testing,and finally puts forward suggestions for optimizing physical health testing of college students.展开更多
In this special issue of the Journal of Sport and Health Science, analyses of the most recent national prevalence esti- mates from the 2016 Physical Activity and Fimess in China-- The Youth Study (PAFCTYS) are prese...In this special issue of the Journal of Sport and Health Science, analyses of the most recent national prevalence esti- mates from the 2016 Physical Activity and Fimess in China-- The Youth Study (PAFCTYS) are presented. These include the prevalence of moderate-to-vigorous physical activity (MVPA).展开更多
The uniaxial compressive strength(UCS) of rock is an important parameter required for design and analysis of rock structures,and rock mass classification.Uniaxial compression test is the direct method to obtain the UC...The uniaxial compressive strength(UCS) of rock is an important parameter required for design and analysis of rock structures,and rock mass classification.Uniaxial compression test is the direct method to obtain the UCS values.However,these tests are generally tedious,time-consuming,expensive,and sometimes impossible to perform due to difficult rock conditions.Therefore,several empirical equations have been developed to estimate the UCS from results of index and physical tests of rock.Nevertheless,numerous empirical models available in the literature often make it difficult for mining engineers to decide which empirical equation provides the most reliable estimate of UCS.This study evaluates estimation of UCS of rocks from several empirical equations.The study uses data of point load strength(Is(50)),Schmidt rebound hardness(SRH),block punch index(BPI),effective porosity(n) and density(ρ)as inputs to empirically estimate the UCS.The estimated UCS values from empirical equations are compared with experimentally obtained or measured UCS values,using statistical analyses.It shows that the reliability of UCS estimated from empirical equations depends on the quality of data used to develop the equations,type of input data used in the equations,and the quality of input data from index or physical tests.The results show that the point load strength(Is(50)) is the most reliable index for estimating UCS among the five types of tests evaluated.Because of type-specific nature of rock,restricting the use of empirical equations to the similar rock types for which they are developed is one of the measures to ensure satisfactory prediction performance of empirical equations.展开更多
Latin dance is a skill performance sport with technology as its core and strength quality as its guarantee. Strength quality is the guarantee of Latin dancers' physical fitness construction, the cornerstone of com...Latin dance is a skill performance sport with technology as its core and strength quality as its guarantee. Strength quality is the guarantee of Latin dancers' physical fitness construction, the cornerstone of completing a set of movements, and the most central part of Latin dancers' special qualities. Strength quality is the guarantee of physical fitness construction of sport dancers, the material basis of completing a set of beautiful movements, and the core quality of all physical qualities of sport dancers. The article discusses the physical fitness and training methods of the sports dance Latin dance special contestants, grasps the characteristics of the project, explores and studies its special physical fitness characteristics, and builds the special physical fitness training content and evaluation indicators of the sports dance special students of the physical education colleges. It is of high significance to carry out targeted training and comprehensively improve the athletic ability of special students.展开更多
Health related physical fitness (HRPF) is considered to be an indirect marker of a person’s health and wellbeing, reflecting the interplay and integration of many persons’ systems and body functions. Purpose: To inv...Health related physical fitness (HRPF) is considered to be an indirect marker of a person’s health and wellbeing, reflecting the interplay and integration of many persons’ systems and body functions. Purpose: To investigate the relationship between body mass index (BMI) and HRPF in a national cross-sectional sample of Saudi girls and adolescents. Methods: Weight, height and four components of HRPF (body fat composition, strength and endurance, flexibility and cardio-respiratory fitness) were measured in three age groups [(8 - 10), (11 - 12) and (13 - 15) years]. Pearson correlation coefficient and regressions analysis using a non-linear quadratic model were used to evaluate the relationship between BMI and HRPF in three age groups. Results: The results revealed variable relationships among tests. Lower scores in body fat composition and cardio-respiratory fitness were associated with higher body mass indexes in each age group. Also lower scores in muscle strength and endurance were recorded in girls aged from 11 to 15 years. Relationships between BMI and flexibility differed among age groups. Conclusion: BMI significantly and differentially influenced individual HRPF, but effects varied with age. Higher body mass indexes were generally associated with lower HRPF. The level of HRPF determined by this study may serve as an indicator of potential health risks that overweight and obese children girls and adolescents faced.展开更多
目的:了解维吾尔族、哈萨克族和汉族大学生的营养和体能状况,调查不同民族体重指数(body mass index,BMI)和体能指数(physical fitness index,PFI)之间的非线性联系。方法:采用分层随机整群抽样方法,抽取2021年新疆维吾尔自治区某高校...目的:了解维吾尔族、哈萨克族和汉族大学生的营养和体能状况,调查不同民族体重指数(body mass index,BMI)和体能指数(physical fitness index,PFI)之间的非线性联系。方法:采用分层随机整群抽样方法,抽取2021年新疆维吾尔自治区某高校非体育专业的维吾尔族、哈萨克族和汉族共3600名大学生作为研究对象,测量身高、体质量、肺活量、50米跑、立定跳远、坐位体前屈、仰卧起坐/引体向上和耐力跑,计算体重指数和各测试成绩的标准化Z分数以及PFI等指标,对数据进行卡方检验、单因素方差分析和非线性二次回归分析。结果:汉族大学生的超重(16.00%)和肥胖(8.08%)检出率明显高于维吾尔族(11.83%和4.08%)和哈萨克族(13.58%和4.58%)大学生,低体重检出率维吾尔族(11.92%)最高,哈萨克族最低(9.75%)。三个民族总体和男女之间BMI分级检出率差异均有统计学意义(P均<0.05)。维吾尔族、哈萨克族和汉族不同BMI分级大学生之间PFI差异均有统计学意义(P均<0.05),总体表现出正常体重组高于其他体重组,且超重组高于肥胖组,但是低体重组的PFI最高。非线性二次回归显示,维吾尔族男女和哈萨克族男生的曲线呈倒“J”形,PFI随着BMI的增大先升高后下降,其余曲线呈弧形,PFI随着BMI的增大而下降。结论:维吾尔族、哈萨克族和汉族大学生超重肥胖会带来体能的下降,但是哈萨克族低体重组男女大学生和汉族低体重组女大学生的体能好于正常体重组。着重提高维吾尔族低体重和超重男生、汉族超重女生的体能可以有效缩小民族内各体重等级和民族间的大学生体能差异。展开更多
文摘Background: Physical fitness tests are widely used to assess endurance,sprint ability,coordination and/or strength.The objective of the present study was to analyze the degree to which the results of the Bundeswehr Basis Fitness Test(BFT)–a physical fitness test comprising a sprint test(11×10-m shuttle test),a flexed-arm hang test and a 1000-m run–are consistent with the output measured during a bicycle ergometer test.The number of false-positive and falsenegative results with regard to the assessment of physical fitness were also examined.Methods: As part of a retrospective study,health assessments from 323 reenlistment examinations were evaluated regarding the output measured during a bicycle ergometer test and compared with the BFT results of the candidates.Results: Overall,a good correlation was shown between the bicycle ergometer test results and the results achieved in the BFT disciplines.All three disciplines of the BFT showed a highly significant correlation with the relative output achieved during the bicycle ergometer test(P<0.001),and also,the overall BFT score was highly significantly correlated(P<0.001).The overall rate of false-positive and false-negative results was 4.0%.Conclusion: The BFT results measured in the three physical fitness test items were highly correlated with the output measured during the bicycle ergometer tests.The rate of false-positive and false-negative results was low.The test items thus represent an appropriate measurement instrument because the test items require few equipment and less time.Additionally,a large number of subjects can be assessed.We suggest that it would be more useful to assess the physical fitness of this special group exclusively on the basis of the BFT instead of using the bicycle ergometer test.
基金supported by Guangzhou Education Science Planning 2020 Project:Innovative Research on the Management of College Student Physical Fitness Test Data Based on Blockchain Technology(Project No.:202012503).
文摘The physical health level of adolescents is related to the future of the motherland and the great rejuvenation of the Chinese nation.Through literature review,induction method,and logical analysis,this paper analyzes the policies related to students’physical health,explains the current situation of physical health testing of students in China,summarizes the problems that occur in the process of physical health testing,and finally puts forward suggestions for optimizing physical health testing of college students.
文摘In this special issue of the Journal of Sport and Health Science, analyses of the most recent national prevalence esti- mates from the 2016 Physical Activity and Fimess in China-- The Youth Study (PAFCTYS) are presented. These include the prevalence of moderate-to-vigorous physical activity (MVPA).
文摘The uniaxial compressive strength(UCS) of rock is an important parameter required for design and analysis of rock structures,and rock mass classification.Uniaxial compression test is the direct method to obtain the UCS values.However,these tests are generally tedious,time-consuming,expensive,and sometimes impossible to perform due to difficult rock conditions.Therefore,several empirical equations have been developed to estimate the UCS from results of index and physical tests of rock.Nevertheless,numerous empirical models available in the literature often make it difficult for mining engineers to decide which empirical equation provides the most reliable estimate of UCS.This study evaluates estimation of UCS of rocks from several empirical equations.The study uses data of point load strength(Is(50)),Schmidt rebound hardness(SRH),block punch index(BPI),effective porosity(n) and density(ρ)as inputs to empirically estimate the UCS.The estimated UCS values from empirical equations are compared with experimentally obtained or measured UCS values,using statistical analyses.It shows that the reliability of UCS estimated from empirical equations depends on the quality of data used to develop the equations,type of input data used in the equations,and the quality of input data from index or physical tests.The results show that the point load strength(Is(50)) is the most reliable index for estimating UCS among the five types of tests evaluated.Because of type-specific nature of rock,restricting the use of empirical equations to the similar rock types for which they are developed is one of the measures to ensure satisfactory prediction performance of empirical equations.
文摘Latin dance is a skill performance sport with technology as its core and strength quality as its guarantee. Strength quality is the guarantee of Latin dancers' physical fitness construction, the cornerstone of completing a set of movements, and the most central part of Latin dancers' special qualities. Strength quality is the guarantee of physical fitness construction of sport dancers, the material basis of completing a set of beautiful movements, and the core quality of all physical qualities of sport dancers. The article discusses the physical fitness and training methods of the sports dance Latin dance special contestants, grasps the characteristics of the project, explores and studies its special physical fitness characteristics, and builds the special physical fitness training content and evaluation indicators of the sports dance special students of the physical education colleges. It is of high significance to carry out targeted training and comprehensively improve the athletic ability of special students.
文摘Health related physical fitness (HRPF) is considered to be an indirect marker of a person’s health and wellbeing, reflecting the interplay and integration of many persons’ systems and body functions. Purpose: To investigate the relationship between body mass index (BMI) and HRPF in a national cross-sectional sample of Saudi girls and adolescents. Methods: Weight, height and four components of HRPF (body fat composition, strength and endurance, flexibility and cardio-respiratory fitness) were measured in three age groups [(8 - 10), (11 - 12) and (13 - 15) years]. Pearson correlation coefficient and regressions analysis using a non-linear quadratic model were used to evaluate the relationship between BMI and HRPF in three age groups. Results: The results revealed variable relationships among tests. Lower scores in body fat composition and cardio-respiratory fitness were associated with higher body mass indexes in each age group. Also lower scores in muscle strength and endurance were recorded in girls aged from 11 to 15 years. Relationships between BMI and flexibility differed among age groups. Conclusion: BMI significantly and differentially influenced individual HRPF, but effects varied with age. Higher body mass indexes were generally associated with lower HRPF. The level of HRPF determined by this study may serve as an indicator of potential health risks that overweight and obese children girls and adolescents faced.
文摘目的:了解维吾尔族、哈萨克族和汉族大学生的营养和体能状况,调查不同民族体重指数(body mass index,BMI)和体能指数(physical fitness index,PFI)之间的非线性联系。方法:采用分层随机整群抽样方法,抽取2021年新疆维吾尔自治区某高校非体育专业的维吾尔族、哈萨克族和汉族共3600名大学生作为研究对象,测量身高、体质量、肺活量、50米跑、立定跳远、坐位体前屈、仰卧起坐/引体向上和耐力跑,计算体重指数和各测试成绩的标准化Z分数以及PFI等指标,对数据进行卡方检验、单因素方差分析和非线性二次回归分析。结果:汉族大学生的超重(16.00%)和肥胖(8.08%)检出率明显高于维吾尔族(11.83%和4.08%)和哈萨克族(13.58%和4.58%)大学生,低体重检出率维吾尔族(11.92%)最高,哈萨克族最低(9.75%)。三个民族总体和男女之间BMI分级检出率差异均有统计学意义(P均<0.05)。维吾尔族、哈萨克族和汉族不同BMI分级大学生之间PFI差异均有统计学意义(P均<0.05),总体表现出正常体重组高于其他体重组,且超重组高于肥胖组,但是低体重组的PFI最高。非线性二次回归显示,维吾尔族男女和哈萨克族男生的曲线呈倒“J”形,PFI随着BMI的增大先升高后下降,其余曲线呈弧形,PFI随着BMI的增大而下降。结论:维吾尔族、哈萨克族和汉族大学生超重肥胖会带来体能的下降,但是哈萨克族低体重组男女大学生和汉族低体重组女大学生的体能好于正常体重组。着重提高维吾尔族低体重和超重男生、汉族超重女生的体能可以有效缩小民族内各体重等级和民族间的大学生体能差异。