著者

Kazuya Tanaka Tomoaki Atomi Yasuhiro Kawahara Miho Shimizu Yoriko Atomi

出版者

International Society of Exercise Sciences

雑誌

Journal of Internationl Exercise Sciences (ISSN:27580105)

巻号頁・発行日

vol.2, no.1, pp.19-25, 2023 (Released:2023-06-30)

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[Purpose] The trunk is extremely important for postural control because it has the largest body mass ratio. This study aimed to clarify the relationship between upper body center of mass (UCoM) control, including the trunk, and one-leg standing balance. [Methods] Ten healthy adult males were subjected to a left-right one-leg standing task. The center of mass total locus length (CoM-TLL), center of pressure total locus length (CoP-TLL), CoP-frequency (CoP-Freq), UCoM deviation (UCoM-Dev), trunk lateral flexion angle of the stance leg side, and hip abduction angle of the stance leg side were analyzed. Pearson's correlation analysis was performed on each parameter to examine the relationship. [Results] ​​Significant correlations were found between the CoM-TLL and UCoM-Dev (r = 0.53, p = 0.02), the CoM-TLL and lateral trunk flexion angle to the stance side (r = 0.47, p = 0.04), CoM-TLL and hip abduction angle (r = 0.45, p = 0.04), and CoP-Freq and trunk lateral flexion angle to the stance side (r = −0.64, p = 0.002) in the one-leg standing position.​ [Conclusion] In postural control, some postural parameters were associated with CoM and CoP sway. Postural parameters that contribute to CoM deviation were found to be related to the amount of body sway. Postural parameters that decrease CoM deviance were found to be related to decreases in the amount of body sway and body sway frequency. Therefore, these suggested that different upper body segmentation and mass control strategies were associated with CoM and CoP.

著者

Eri Ohto-Fujita Nozomi Hatakeyama Aya Atomi Shunsuke Yasuda Shoki Kodama Tomoaki Atomi Kazuya Tanaka Noboru Hirose Kenji Harada Yoshihide Asano Toshiyuki Watanabe Yukio Hasebe Miho Shimizu Yoriko Atomi

出版者

The Society of Fiber Science and Technology, Japan

雑誌

Journal of Fiber Science and Technology (ISSN:21897654)

巻号頁・発行日

vol.77, no.10, pp.258-265, 2021 (Released:2021-10-23)

参考文献数

49

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Chicken eggshell membrane (ESM) is a two-layered insoluble sheet located between the eggshell and the albumen and is composed of fibrous proteins. Naturally occurring composite material, such as ESM have various ameliorative effects for osteoarthritis of the knee, joint, and connective tissue when ingested and absorbed as supplements. The physiological effects by oral ESM intake, especially on respiratory function,remain unclear. We have recently reported that tritium-labeled ESM powder can be digested and absorbed by mice and distributed in tissues throughout the body. We have also reported that the application of hydrolyzed water-soluble ESM to human skin significantly improved skin elasticity, which declines with aging, in a before and after comparison at 3 months, and significantly reduced wrinkles at the corners of the eyes compared to controls. In the present double-blind, placebo-controlled study, we examined breathing, skin, and body functions, such as zigzag walking, after ESM ingestion compared to controls. We hypothesized this to improve physical functions by improving the extracellular matrix (ECM) within the range of homeostasis. Among 20 healthy subjects (age: 21–68 years), the group given ESM supplementation for 8 weeks showed significantly increased rate of change in arm skin elasticity, respiratory function (forced expiratory volume in 1 s to forced vital capacity ratio (FEV1/FVC)), and zigzag walking speed compared to controls. There was a significant correlation between the rate of change in FEV1/FVC and that of zigzag walking after 8 weeks compared to the initial values. These functional improvements observed in skin elasticity, lung function, and motor function with oral intake of ESM suggest that maintaining elasticity in the cellular environment can support overall health and activity levels.

著者

AYA SAKAGUCHI AKINOBU KADOKURA PETER STEIER KAZUYA TANAKA YOSHIO TAKAHASHI HARUKA CHIGA AKIHITO MATSUSHIMA SATORU NAKASHIMA YUICHI ONDA

出版者

GEOCHEMICAL SOCIETY OF JAPAN

雑誌

GEOCHEMICAL JOURNAL (ISSN:00167002)

巻号頁・発行日

vol.46, no.4, pp.355-360, 2012-08-20 (Released:2013-11-08)

参考文献数

26

被引用文献数

90 27

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Concentrations of the radionuclides, U, Pu, and Cs were measured in water samples (10-20 L) to study analyte dispersion and migration following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. A total of 8 water samples including oceanic water and paddy-field water were collected in the vicinity of the plant. Determinations of U, Pu and Cs isotopes were performed by accelerator mass spectrometry (AMS), inductively coupled plasma mass spectrometry (ICP-MS), and γ-ray spectrometry. The 236U/238U atom ratio was in the range 1.83-8.20 × 10-9 for fresh water and around 0.57 × 10-9 for seawater while the concentration of 236U was about 104-105 and 106 atoms/kg, respectively. Plutonium (239,240Pu) was detected in one riverine sample and the marine samples at very low levels and with large uncertainty. The concentrations of 137Cs in fresh riverine samples were 0.02-0.46 Bq/kg which are more than three orders of magnitude larger than the global fallout level. As for seawater samples within 80 km offshore of the FDNPP, the concentrations of 137Cs were 10-20 times higher than that of the Japan Sea water. Also 134Cs and 137Cs were of similar concentrations in all samples. The results show that volatile and refractory nuclides such as Cs, U and Pu exist in the dissolved phase, which can be readily assimilated by plants/humans. However the environmental impact of Pu and U in the vicinity of the FDNPP is considered to be low in comparison to that of the volatile radionuclide Cs.