일본 남자고등학생의 신체구성과 체력에 대한 상관관계의 검증

藤井勝紀(Katsunori Fujii),田中望(Nozomi Tanaka),石垣享(Toru Ishigaki),藤由美(Yumi Saito),김준동(Jun Dong Kim),노호성(Ho Sung Nho) 한국발육발달학회 2009 한국발육발달학회지 Vol.17 No.3

The declining trend in the physical fitness of young people poses a severe problem. This trend in physical fitness is considered one of the important factor occurring due to the difference in morphological quality judged by body composition. However, few studies of the kind reported. In the present study, the physical fitness based on difference of morphological quality is confirmed in high school boys. The sample size consists of 146 high school boys aged 16 years. Height, weight, body mass index (BMI), body fat mass, percentage of body fat, soft lean mass (SLM), bone mass and bone mineral density for physique and body composition were measured, in addition to, grip strength, sit-up, sit & reach, side step, 20m shuttle run, 50-m dash, standing long jump and hand ball throwing were measured as physical fitness tests. 20m shuttle run, sit-up and hand ball throwing showed a significant difference among "slim type," "normal type" and "fatty type", classified by the fatty-slim degree judgment based on BMI. Next, a regression polynomial evaluation chart of fat percentage for BMI was constructed in order to examine the physical fitness based on the difference of morphological quality. Physical fitness was examined based on the difference in the degree of qualitative accumulation of fat (excessive development of fat, normal fat, excessive underdevelopment of fat) derived from the evaluation chart. As a result, the student with excessive development of fat was significantly inferior and the excessive underdevelopment of fat type student was significantly superior in grip strength, standing long jump and hand ball throwing ability of the excessive development type. The result indicated a difference in physical fitness based on the difference in the degree of qualitative accumulation. This suggests that the fat percentage was a negative factor for motor ability.

사춘기의 신체질량지수에 대한 체력의 평가

藤井勝紀(Katsunori Fujii),田中望(Nozomi Tanaka),石垣享(Toru Ishigaki),花井忠征(Tadayuki Hanai),김설향(Seol Hyang Kim),노호성(Ho Sung Nho) 한국발육발달학회 2008 한국발육발달학회지 Vol.16 No.1

In the present study, the relational construction between body composition and physical fitness is confirmed regarding physical fitness based on polynomial regression evaluation of body fat percentage for body mass index (BMI) in adolescence. The sample size consists of 384 Korean junior high school students aged 13 years (boys: 200; girls: 184). Height, weight, BMI, body fat mass, body fat percentage, soft lean mass were measured along with physical fitness tests (sit & reach, 20 m-shuttle run, push up and sit up). Physical fitness showed a significant difference among "slim type", "normal type" and "fatty type" classified by the fatty-slim degree judgment of BMI. Next, a polynomial regression evaluation chart of fat percentage for BMI was constructed in order to verify physical fitness by the difference of body form quality. Physical fitness was examined based on difference in the degree of qualitative accumulation of fat (excessive fat, normal fat underestimated fat) derived from the evaluation chart. As a result, the excessive fat person was significantly inferior and the underestimated obese person was significantly superior in endurance ability in the normal type. There was a difference in physical fitness based on the difference in the degree of qualitative accumulation of fat. This suggests that the fat was a negative factor for endurance ability in normal type based on the fatty-slim degree judgment of BMI.

골밀도 연령증가변화구도에 기초한 Peak Stiffness의 검증

藤井勝紀(Fujii, Katsunori),田中望(Tanaka, Nozomi),고인태(Ko, In-Tae),김준동(Kim, Jun-Dong) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.6

Bone mass is reported to peak at about the age of 15 to 17 years, but the peak in bone density is not clear. Therefore, the pubertal peak in bone density is also unknown. In this study, using a method of assessing bone density by stiffness coefficient, we applied a least squares approximation polynomial to stiffness coefficient age distance values from the first grade of elementary school until the third year of junior high school (ninth grade), and investigated the changing trends with age. The results showed the age-related changes in the stiffness coefficient, BUA value, and SOS value based on third order least squares approximation polynomials. The peaks determined from the second-order polynomial curve of the first derivative were 11.4 years old with the stiffness coefficient and near 11.5 years old with the BUA and SOS values. Next, to identify the pubertal peak (maximum peak velocity: MPV) of the stiffness coefficient, wavelet interpolation was applied and peak stiffness was derived. The MPV age of the stiffness coefficient was 11.2 years old. The MPV age of height is 12.6 years old and the MPV of weight is 13.4 years old. This MPV age for bone density is earlier that the MPV ages for height and weight, and it is conjectured that on average this is related to the growth of the length of the lower limbs (lower legs). On the other hand, the possibility cannot be ruled out that substantial development of bone density promotes growth in height.

아동ㆍ청소년기 신체적 발육ㆍ발달곡선에 관한 분석

藤井勝紀(Fujii, Katsunori),田中望(Tanaka, Nozomi),김준동(Kim, Jun-Dong) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.1

In the present study, annual change of physical growth and development was examined during school age. The wavelet interpolation method was applied to cross-sectional data from 6 to 17 years in 2000 and 2005, based on the records of the physique (height, weight, sitting height, leg length), physical strength and motor ability (grip strength, side step, trunk bending, sit-up, 50m dash, standing long jump and handball throwing) announced by Ministry of Education, Science and Technology every year. As the results, the growth distance and velocity curves were analyzed in the physique. In physical strength and motor ability, the developmental distance and velocity curves were also analyzed, and the change of physical strength and motor ability with age was examined. With judging from the growth velocity curve of physique, the growth velocities in leg length was the fastest among the physique in both 2000 and 2005. Moreover, the age at MPV of leg length was also the earliest, and that of BMI was the latest in both 2000 and 2005. It was shown that MPV of grip strength appeared almost in a simultaneous period with MPV of height, and trunk bending and sit-up appeared after MPV of height.

低体力傾向の芸術系大学生から判断される発育期の運動クラブ活動の必要性

石垣享(Ishigaki, Tohoru),田中望(Tanaka, Nozomi),金俊東(Kim, Jun-Dong),藤井勝紀(Fujii, Katsunori) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1

The aim of this study was to examine the physical fitness level of non-exercise experience and the contribution of exercise and sports activities during adolescent to physical fitness. Subject was the freshman of arts university student(Male=205 and Female=1003) who immediately after graduated high school. Subject was divided to three groups which were non exercise-experienced group(NEE), exercise -experienced until junior high school group(EEJ) and exercise-experienced until high school group(EEH). Subject was measured body weight and height, strength of hand grips(SHG), and sit-ups. Subject also performed shuttle-run test(SRT). Significant differences were not observed in male SRT. In the other hand, all physical fitness parameters of female exercise-experience groups were significantly higher than those of NEE. Especially, the result of SRT of EEH was significantly higher than that of EEJ. However, the result of sit-ups in both gender were very cheap even if those of exercise-experience. Male flexion of trunk ability in NEE was 15% of lower than that of standard value, in the same manner that of female was 20% of lower. That ability was reached to normal level in male EEH and female EEJ and EEH. The present result indicated that sufficient exercise and sports activities during adolescent need for prevention of the future low back pain.

最小二乗近似多項式による幼児期男児の体格ㆍ運動能力の時代的変遷に関する検討

糟谷浩輔(Kasuya, Kosuke),藤井勝紀(Fujii, Katsunori),田中望(Tanaka, Nozomi),金俊東(Kim, Jun-dong) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.6

This study was to investigate annual trends of physique and physical fitness of 4 and 5 years old boys from 1969 to 2009. Annual trends of physique were considered by height, weight, and BMI. In addition, annual trends of physical fitness were examined by 20m dash, tennis ball throw, standing long jump, one-leg hop and hanging from a horizontal bar. No further shifts toward earlier or larger growth were seen among parameters of physique. Among parameters of motor performance, declining or stagnation trends were seen. Though stagnation trend was seen in height, declining trend was seen in weight. In physical fitness, declining trends were seen especially in tennis ball throw and hanging from a horizontal bar. From these, decreased upper body muscle strength due to decrease in muscle mass was suspected. Also, stagnation or declining trend in other items of physical strength of preschool boys was seen. Considered with the findings in the other reports, the possibility of physical strength is lowered in the coming years was suggested.

일본 하치노헤시(八戶市)유아의 체격과 운동능력에 관한 종단적 연구

三島隆章(Takaaki Mishima),岩千步(Chiho Iwadate),田中望(Nozomi Tanaka),김준동(Jun Dong Kim) 한국발육발달학회 2009 한국발육발달학회지 Vol.17 No.4

In a survey of the motor ability of young children in the city of Hachinohe, the motor ability of 60 children in a nursery school associated with Hachinohe Junior College was measured over two years. In addition, to compare the findings with national surveys, the results of 604 children enrolled at this nursery school in the 2007 and 2008 school years were classified by age at the time the measurements were made, and totaled. It was found that boys had significantly lower scores for timed body support, long jump, and softball throw than the results of the national test. For girls a difference with the national survey was seen in timed body support only. These results suggest that among young children in Hachinohe, boys have lower instantaneous strength, muscle endurance, and throwing strength, and girls have lower muscle endurance, compared with the national average.