Verification Regarding Secular Trend of Height Growth and The Maximum Peak Velocity during Adolescence

Fujii, Katsunori

doi:10.5432/ijshs.ijshs20070289

Cited by 2 publications

(3 citation statements)

References 18 publications

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“…When constructing an O model multi-year span evaluation chart, it is important to prepare an evaluation line that distinguishes between evaluation bands. Until recently, the method of analyzing trends over years has been to apply a least squares approximation polynomial devised by Fujii [13], but it had the problem that it did not go through the observation points, and so while it was sufficiently effective for seeing simple trends, in this study we decided to apply the wavelet interpolation model, which can pass through the observation points, rather than the least squares approximation since this study had a relatively short span of seven years. The reason for applying the wavelet interpolation model is that with first-degree functions only linearly increasing compositions can be verified, but with second degree or higher functions it is thought that the composition of the changes in increases can be captured in detail.…”

Section: Discussionmentioning

confidence: 99%

“…The characteristics of the wavelet interpolation model are that local phenomena are read sensitively and the approximation accuracy is very high. The details of the theoretical background and the grounds for its effectiveness have already been described in Fujii's previous research [11][12][13], so the data analysis algorithm using the wavelet interpolation model is omitted here. In this study, especially, the wavelet interpolation model was applied to the age distance value of annual trend of physical fitness from 2013 to 2019 years in second year girls' junior high school (seventh grade) students.…”

Section: Wavelet Interpolation Model (Wim)mentioning

confidence: 99%

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Analysis of Changes in Physical Strength over Time in Recent School-Age Students: Proposal for Multi-year Span Evaluation Chart with the O Model

Watanabe¹,

Fujii²,

Abe³

et al. 2021

AJSS

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For school-age children to lead healthy lives, they need suitable physical abilities for those lives. Together with this, measurements of physical strength and motor ability to assess those abilities could be considered essential. The physical strength of children has declined in recent years, and City O in the Kansai area of Japan has implemented an action plan to address the problem. This action plan was developed from a survey continued over seven years of the physique, physical strength, and motor abilities of fifth grade elementary school students and second year junior high school (seventh grade) students. To assess the efficacy of City O's action plan, this study analyzed trends in strength and motor ability over seven years to examine whether trends were rising or falling. The method adopted for this plan was to measure the same items as those in the strength and motor ability survey conducted by the Ministry of Education, Culture, Sports, Science and Technology. The wavelet interpolation model was applied to the multi-year trends in the results obtained over seven years to examine whether they were improving or declining. An improving trend was seen with time in the physical strength and motor ability of second-year junior high school girls. One may infer that behind the improving trend over time were the effects from City O's action plan. The background for the improving trend seen over the years seen in second year junior high school girls but not boys may include that girls were originally less active than boys and but were encouraged to be active by the action plan. Because the second year of junior high school is the period of late puberty for girls, and is a time when they are approaching their developmental peak in physical strength, it may be inferred that the increase in physical strength was affected by factors in the action plan. In this study, a new evaluation chart that considers trends over years was established using the wavelet interpolation model, and the efficacy of the multi-year span evaluation chart for physical strength is presented as the O model.

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Section: Discussionmentioning

confidence: 99%

Section: Wavelet Interpolation Model (Wim)mentioning

confidence: 99%

Analysis of Changes in Physical Strength over Time in Recent School-Age Students: Proposal for Multi-year Span Evaluation Chart with the O Model

Watanabe¹,

Fujii²,

Abe³

et al. 2021

AJSS

Self Cite

View full text Add to dashboard Cite

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“…Kikuta et al sought the age at which the annual amount of height growth was the highest, in other words, the age at peak height velocity (PHV) in puberty, and from analysis of the time trends in that age reported that the age at which PHV appeared was getting younger [4]. Fujii and Fujii et al took this research a step further and identified the age at maximum peak velocity (MPV) in height using a wavelet interpolation model and verified the growth acceleration phenomenon from secular trends in age at MPV [5,6]. However, in 1973, when Japan's high economic growth was coming to an end, the phenomenon of promoted growth was also gradually tapering off, and from that time until today no clear changes has been seen in the age at MPV of height.…”

Section: Introductionmentioning

confidence: 99%

The Relationship Between Physical Development and Economic Growth in Japan: From the Perspective of Regional Differences in Biological Parameters

Kani¹,

Fujii²,

Abe³

et al. 2020

AJSS

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Following the Second World War, there was a rapid increase in body size in Japan as a result of qualitative changes in the human environment from marked economic growth and the stable supply of nutrition. A phenomenon that facilitated this physical growth may be seen in the larger body sizes and earlier maturation combined with the secular trends in GDP resulting from high economic growth. However, this high economic growth did not occur uniformly nationwide. Similarly in physical growth, the trend for earlier maturation was not seen uniformly nationwide. This study applied the wavelet interpolation method to identify the age at maximum peak velocity (MPV) in pubertal growth (a biological parameter) from the growth velocity curves for height described for the 47 prefectures of Japan from 1955 to 2015. A secular trend model of this biological parameter was then constructed. This parameter as seen particularly in urban and rural areas was then applied to the secular trend model and, based on a composition that eliminates regional differences, the possibilities as a barometer of economic growth based on the biological parameter of early maturation were then explored. The results showed a trend for earlier maturation in all prefectures for both boys and girls. The multi-year span evaluation chart in this study showed a trend for earlier maturation from 1955 to 1970 in Tokyo and other large cities, after which there was a transition to average maturation. In Aomori, Oita and other rural areas, there was a trend for late maturation from 1955 to 1970, followed by a transition to earlier maturation. From these trends, there may be said to be a close relationship between physical growth and socioeconomic status. However, since the late 1990s the difference in maturation rate in urban and rural regions has disappeared. This may be from the effect of high economic growth coming to an end.

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Verification Regarding Secular Trend of Height Growth and The Maximum Peak Velocity during Adolescence

Cited by 2 publications

References 18 publications

Analysis of Changes in Physical Strength over Time in Recent School-Age Students: Proposal for Multi-year Span Evaluation Chart with the O Model

Analysis of Changes in Physical Strength over Time in Recent School-Age Students: Proposal for Multi-year Span Evaluation Chart with the O Model

The Relationship Between Physical Development and Economic Growth in Japan: From the Perspective of Regional Differences in Biological Parameters

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