著者

Yudai KIKUCHI Wataru ITO Tomoya TAKABAYASHI Takanori KIKUMOTO Takahiro WATANABE Anthony Alexis Santos LAIGO Masayoshi KUBO

出版者

Japanese Society of Biomechanics

雑誌

バイオメカニクス研究 (ISSN:13431706)

巻号頁・発行日

vol.27, pp.1-8, 2023 (Released:2023-04-21)

参考文献数

30

---

The purpose of this study was to examine the correlation between the passive and dynamic range of hip internal rotation (HIR), one of the risk factors for Jones fracture, foot progression angle (FPA), and lateral deviation of the center of pressure (COP), which is loading index on the fifth metatarsal bone. This crossover study included 12 men with soccer experience. The passive range of HIR (HIR-p) was measured in the prone position. The motion task was crossover cutting in the 45-degree direction and was measured using the 3D motion analysis system and force plate. HIR angle in motion (HIR-m), FPA at initial contact, and the percentage of lateral deviation of the COP within the foot (%LCOP) were calculated from each trajectory. No significant correlation was found between HIR-p and each parameter. %LCOP deviated laterally as peak HIR-m was greater (r = 0.72, p = 0.008). And the greater the FPA, the lower the peak HIR-m (r = -0.83, p = 0.0007). HIR-p may not a factor that increases the mechanical load on the fifth metatarsal bone. Furthermore, increasing the FPA in crossover cutting may alter hip kinematics and result in reduced mechanical loading on the fifth metatarsal bone.

著者

Takahiro Watanabe Yohei Kataoka Kyoko Hayashi Rieko Matsuda Chikako Uneyama

出版者

Food Safety Commission, Cabinet Office, Government of Japan

雑誌

Food Safety (ISSN:21878404)

巻号頁・発行日

vol.10, no.3, pp.83-101, 2022 (Released:2022-09-23)

参考文献数

34

被引用文献数

8

---

Some countries have conducted a total diet study (TDS) focused on the estimation of specific trace elements. Although some results of a Japanese TDS examining trace elements were published, there have been no reports of a nationwide TDS across Japan over a multi-year period to estimate the level of exposure to multiple elements. In the present study, a TDS using a market basket approach was performed to estimate the dietary exposure levels of the general population of Japan to 15 elements, including aluminum (Al), total arsenic (tAs), boron (B), barium (Ba), cadmium (Cd), cobalt (Co), chromium (Cr), total mercury (THg), molybdenum (Mo), nickel (Ni), lead (Pb), antimony (Sb), selenium (Se), tin (Sn), and uranium (U). Samples prepared in eight regions across Japan over a 6-year period were analyzed using validated methods. The robust mean exposure estimates for Al, tAs, B, Ba, Cd, Co, Cr, THg, Mo, Ni, Pb, Sb, Se, Sn, and U were 48, 4.2, 29, 8.6, 0.35, 0.17, 0.49, 0.14, 4.2, 2.8, 0.15, 0.022, 1.8, 0.10, and 0.021 μg/kg body weight/day, respectively. Although the variability in exposure estimates varied greatly from element to element, the relative standard deviations calculated from the robust means and robust standard deviations were ≤ 50% for all elements except Sn. Compared against the health-based guidance values, none of the robust and precise estimates obtained for the target elements would be associated with urgent health risk concern. In addition, the estimated exposure levels were generally in agreement with previously reported estimates, indicating that health risks associated with exposure to these elements have not changed markedly nationwide in Japan in recent years.

著者

TAKAHIRO WATANABE

出版者

The Juntendo Medical Society

雑誌

順天堂醫事雑誌 (ISSN:21879737)

巻号頁・発行日

vol.66, no.Suppl.1, pp.83-87, 2020 (Released:2020-09-30)

参考文献数

4

被引用文献数

2