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Article ; Online: Effects of a body manipulation of Japanese martial arts on interpersonal correlation of postural sway.

Watanabe, Yuya / Sakaguchi, Yutaka

2022 Volume 17, Issue 9, Page(s) e0274294

Abstract: This study aimed to investigate the nature of a specific body manipulation named Suichoku-Ririku (SR) in Japanese martial arts. SR is regarded as a method to change the way of stance and to distort the balance control of the opponent, but its nature and ... ...

Abstract	This study aimed to investigate the nature of a specific body manipulation named Suichoku-Ririku (SR) in Japanese martial arts. SR is regarded as a method to change the way of stance and to distort the balance control of the opponent, but its nature and mechanism are unknown. In the present study, we attempted to determine the effect of SR in the cases that a person stood alone (Expt. 1) and that two persons stood in contact (Expt. 2). We compared several center of pressure (COP) measures between the normal stance and SR stance conditions. When participants stood independently (Expt. 1), the COP path length, standard deviation of COP velocity and permutation entropy of the COP increased with the SR stance, which suggested that the SR maneuver destabilized a quiet stance. When two participants stood (with normal stance) in contact by wrist-holding or by a light touch (Expt. 2), their COP motions were correlated with each other, as previously reported. When one of the participants took the SR maneuver, their correlation and mutual information were maintained, denying the view that SR would diminish the interpersonal correlation of body sway. On the other hand, a fluctuation in the COP increased only for the participant taking the SR maneuver, and not for the other participant. This asymmetric effect of the SR maneuver between two participants, irrespective of maintained mutual correlation, suggest that the relationship between balance controls of two participants was partly disrupted. We discuss possible mechanisms for the present results.
MeSH term(s)	Humans ; Japan ; Martial Arts ; Postural Balance ; Touch ; Upper Extremity
Language	English
Publishing date	2022-09-12
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0274294
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Article ; Online: Comparison of Physical Activity and Sedentary Behavior between Work in Office and Work From Home: A Self-controlled Study.

Tomonaga, Ryo / Watanabe, Yuya / Jiang, Ying / Nakagawa, Toru / Yamato, Hiroshi

Journal of occupational and environmental medicine

2024 Volume 66, Issue 4, Page(s) 344–348

Abstract: Objective: To compare physical activity levels and sedentary behavior between individuals working in the office and those working from home, with the aim of elucidating the potential implications on employees' health.: Methods: We used triaxial ... ...

Abstract	Objective: To compare physical activity levels and sedentary behavior between individuals working in the office and those working from home, with the aim of elucidating the potential implications on employees' health. Methods: We used triaxial accelerometers to assess the physical activity levels of 94 white-collar employees from a large-scale manufacturing company in Japan. They were instructed to wear the accelerometers during their working hours, which included the commuting time on work-in-office days. Results: The mean energy expenditure on work in office was 426 kcal for individuals, while it was 228 kcal on work from home (P < 0.01). In addition, not including commuting, the time spent sedentary on work-from-home days was higher than that on work-in-office days by 20 minutes. Conclusions: Work from home decreases physical activity and increases sedentary time compared with work in office.
MeSH term(s)	Humans ; Sedentary Behavior ; Workplace ; Teleworking ; Exercise ; Research Design
Language	English
Publishing date	2024-02-07
Publishing country	United States
Document type	Journal Article
ZDB-ID	1223932-x
ISSN	1536-5948 ; 1076-2752
ISSN (online)	1536-5948
ISSN	1076-2752
DOI	10.1097/JOM.0000000000003061
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Article ; Online: Frailty modifies the association of body mass index with mortality among older adults: Kyoto-Kameoka study.

Watanabe, Daiki / Yoshida, Tsukasa / Watanabe, Yuya / Yamada, Yosuke / Miyachi, Motohiko / Kimura, Misaka

Clinical nutrition (Edinburgh, Scotland)

2024 Volume 43, Issue 2, Page(s) 494–502

Abstract: Background & aims: The differences in the association of body mass index (BMI) with mortality between older adults with and without frailty remain unclear. This study investigated this association in community-dwelling older adults with and without ... ...

Abstract	Background & aims: The differences in the association of body mass index (BMI) with mortality between older adults with and without frailty remain unclear. This study investigated this association in community-dwelling older adults with and without frailty. Methods: This prospective study included 10,912 adults aged ≥65 years who provided valid responses to a baseline mail survey questionnaire in the Kyoto-Kameoka Study in Japan. The BMI was calculated based on self-reported height and body weight and classified into four categories: <18.5, 18.5-21.4, 21.5-24.9, and ≥25.0 kg/m Results: During the 5.3 year median follow-up period (54,084 person-years), 1352 deaths were recorded. After adjusting for confounders, including lifestyle and medical history, compared with participants with a BMI of 21.5-24.9 kg/m Conclusions: The relationship between BMI and mortality varies between individuals with and without frailty, with those experiencing frailty potentially benefiting from a higher BMI compared to those without frailty. This study suggests that frailty should be assessed when considering the optimal BMI for the lowest mortality risk among older adults.
MeSH term(s)	Aged ; Humans ; Frailty ; Body Mass Index ; Prospective Studies ; Frail Elderly ; Independent Living
Language	English
Publishing date	2024-01-04
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	604812-2
ISSN	1532-1983 ; 0261-5614
ISSN (online)	1532-1983
ISSN	0261-5614
DOI	10.1016/j.clnu.2024.01.002
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Zs.A 1774: Show issues

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Article ; Online: Thigh muscle thickness on ultrasonography for diagnosing sarcopenia: The Kyoto-Kameoka study.

Yoshida, Tsukasa / Watanabe, Yuya / Yokoyama, Keiichi / Kimura, Misaka / Yamada, Yosuke

Geriatrics & gerontology international

2023 Volume 24 Suppl 1, Page(s) 156–161

Abstract: Aim: The Asian Working Group for Sarcopenia 2019 consensus reported that evidence for the diagnosis of sarcopenia based on ultrasonography findings is lacking. The revised European Working Group on Sarcopenia in Older People consensus stated that ... ...

Abstract	Aim: The Asian Working Group for Sarcopenia 2019 consensus reported that evidence for the diagnosis of sarcopenia based on ultrasonography findings is lacking. The revised European Working Group on Sarcopenia in Older People consensus stated that ultrasonography is reliable and valid for assessing muscle size in older adults. The present study aimed to determine the predictive accuracy of ultrasonography for sarcopenia in older adults in Japan. Methods: A total of 1229 participants aged 65-91 years were included in this cross-sectional study. The thickness of the anterior compartment of the right thigh was assessed using B-mode ultrasonography. The measurement position was at the midpoint of the thigh. In addition, the grip strength, gait speed, Five-Time Sit-to-Stand Test, Short Physical Performance Battery score and skeletal muscle mass index were evaluated. Sarcopenia was diagnosed based on the Asian Working Group for Sarcopenia 2019 algorithm. We calculated the area under the receiver operating characteristic curve. Results: The area under the receiver operating characteristic curves (95% confidence intervals) and cutoff values for the thigh muscle thickness in sarcopenia were 0.901 (0.856-0.946) and 4.0 cm in men, respectively, and 0.923 (0.851-0.995) and 3.1 cm in women, respectively. The area under the receiver operating characteristic curve for each subdomain of sarcopenia, such as grip strength and gait speed, ranged from 0.618 to 0.872. Conclusions: In the present study, the suggested cutoff mid-thigh muscle thicknesses on ultrasonography for predicting sarcopenia were 4.0 cm in men and 3.1 cm in women. Geriatr Gerontol Int 2024; 24: 156-161.
MeSH term(s)	Male ; Humans ; Female ; Aged ; Sarcopenia/diagnostic imaging ; Thigh/diagnostic imaging ; Cross-Sectional Studies ; Muscle, Skeletal/diagnostic imaging ; Muscle, Skeletal/physiology ; Muscle Strength/physiology ; Hand Strength ; Ultrasonography
Language	English
Publishing date	2023-10-27
Publishing country	Japan
Document type	Journal Article
ZDB-ID	2113849-7
ISSN	1447-0594 ; 1444-1586
ISSN (online)	1447-0594
ISSN	1444-1586
DOI	10.1111/ggi.14714
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Zs.A 5801: Show issues

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Article ; Online: Combined Use of Sleep Quality and Duration Is More Closely Associated With Mortality Risk Among Older Adults: A Population-based Kyoto-Kameoka Prospective Cohort Study.

Watanabe, Daiki / Yoshida, Tsukasa / Watanabe, Yuya / Yamada, Yosuke / Miyachi, Motohiko / Kimura, Misaka

Journal of epidemiology

2023 Volume 33, Issue 12, Page(s) 591–599

Abstract: Background: Whether sleep quality and duration assessed from multiple domains, either individually or in combination, are strongly associated with mortality risk in older adults remains unelucidated. We aimed to clarify these relationships.: Methods: ...

Abstract	Background: Whether sleep quality and duration assessed from multiple domains, either individually or in combination, are strongly associated with mortality risk in older adults remains unelucidated. We aimed to clarify these relationships. Methods: We enrolled 7,668 older (age ≥65 years) Japanese adults in the Kyoto-Kameoka prospective cohort study who provided valid responses to the Pittsburgh Sleep Quality Index (PSQI) in a mail-in survey. Sleep quality and duration were classified into six groups using the previously validated PSQI: short sleep duration (SSD: <360 min/day)/sleep disturbance (SD: ≥5.5 PSQI points), n = 701; SSD/non-sleep disturbance (NSD: <5.5 PSQI points), n = 100; optimal sleep duration (OSD: 360-480 min/day)/NSD, n = 1,863; OSD/SD, n = 2,113; long sleep duration (LSD: >480 min/day)/NSD, n = 1,972; LSD/SD, n = 919. Mortality data were collected from February 15, 2012, to November 30, 2016. We evaluated the relationship between all-cause mortality risk and sleep quality and duration (and their combinations) using a multivariable Cox proportional hazards model that included baseline covariates. Results: The median follow-up period was 4.75 years (34,826 person-years), with a total of 616 deaths. After adjusting for confounders, compared with other groups, SSD/SD and LSD/SD had the highest hazard ratio (HR) of mortality (SSD/SD: HR 1.56; 95% confidence interval [CI], 1.10-2.19; SSD/NSD: HR 1.27; 95% CI, 0.47-3.48; OSD/NSD: reference; OSD/SD: HR 1.20; 95% CI, 0.91-1.59; LSD/NSD: HR 1.35; 95% CI, 1.03-1.77; LSD/SD: HR 1.83; 95% CI, 1.37-2.45). However, mortality risk was not associated with the interaction between sleep quality and duration. Conclusion: Older adults with sleep disturbances involving SSD and LSD have a strong positive association with mortality risk, suggesting an additive effect between sleep quality and duration.
MeSH term(s)	Humans ; Aged ; Sleep Quality ; Prospective Studies ; Japan/epidemiology ; Sleep/physiology ; Sleep Wake Disorders
Language	English
Publishing date	2023-02-18
Publishing country	Japan
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1442118-5
ISSN	1349-9092 ; 0917-5040
ISSN (online)	1349-9092
ISSN	0917-5040
DOI	10.2188/jea.JE20220215
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Zs.A 4931: Show issues

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Article ; Online: Association between doubly labelled water-calibrated energy intake and objectively measured physical activity with mortality risk in older adults.

Watanabe, Daiki / Yoshida, Tsukasa / Watanabe, Yuya / Yamada, Yosuke / Miyachi, Motohiko / Kimura, Misaka

The international journal of behavioral nutrition and physical activity

2023 Volume 20, Issue 1, Page(s) 150

Abstract: Background: Physical activity or biomarker-calibrated energy intake (EI) alone is associated with mortality in older adults; the interaction relationship between the combined use of both factors and mortality has not been examined. We evaluated the ... ...

Abstract	Background: Physical activity or biomarker-calibrated energy intake (EI) alone is associated with mortality in older adults; the interaction relationship between the combined use of both factors and mortality has not been examined. We evaluated the relationship between mortality and calibrated EI and step counts in older adults. Methods: This prospective study included 4,159 adults aged ≥65 years who participated in the Kyoto-Kameoka study in Japan and wore a triaxial accelerometer between 1 April and 15 November 2013. The calibrated EI was calculated based on a previously developed equation using EI biomarkers. The step count was obtained from the accelerometer ≥ 4 days. Participants were classified into the following four groups: low EI (LEI)/low step counts (LSC) group (EI: <2,400 kcal/day in men and <1,900 kcal/day in women; steps: <5,000 /day), n = 1,352; high EI (HEI)/LSC group (EI: ≥2,400 kcal/day in men and ≥1,900 kcal/day in women; steps: <5,000 /day), n = 1,586; LEI/high step counts (HSC) group (EI: <2,400 kcal/day in men and < 1,900 kcal/day in women; steps: ≥5,000 /day), n = 471; and HEI/HSC group (EI: ≥2,400 kcal/day in men and ≥1,900 kcal/day in women; steps: ≥5,000 /day), n = 750. Mortality-related data were collected until 30 November 2016. We performed a multivariable Cox proportional hazard analysis. Results: The median follow-up period was 3.38 years (14,046 person-years), and 111 mortalities were recorded. After adjusting for confounders, the HEI/HSC group had the lowest all-cause mortality rate compared to other groups (LEI/LSC: reference; HEI/LSC: hazard ratio [HR]: 0.71, 95% confidence interval [CI]: 0.41-1.23; LEI/HSC: HR: 0.59, 95% CI: 0.29-1.19; and HEI/HSC: HR: 0.10, 95% CI: 0.01-0.76). No significant interaction was observed between the calibrated EI and steps with mortality. The spline model showed that 35-42 kcal/100 steps/day of EI/100 steps was associated with the lowest mortality risk. Conclusions: HR mortality risk was lowest at 35-42 kcal/100 steps/day, suggesting that very high (≥56 kcal) or low (<28 kcal) EI/100 steps are not inversely associated with mortality. Adherence to optimal EI and adequate physical activity may provide sufficient energy balance to explain the inverse association with mortality among older Japanese adults.
MeSH term(s)	Male ; Humans ; Female ; Aged ; Water ; Prospective Studies ; Energy Intake ; Exercise ; Drinking
Chemical Substances	Water (059QF0KO0R)
Language	English
Publishing date	2023-12-25
Publishing country	England
Document type	Journal Article
ZDB-ID	2134691-4
ISSN	1479-5868 ; 1479-5868
ISSN (online)	1479-5868
ISSN	1479-5868
DOI	10.1186/s12966-023-01550-x
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Article ; Online: Dose-Response Relationships between Objectively Measured Daily Steps and Mortality among Frail and Nonfrail Older Adults.

Watanabe, Daiki / Yoshida, Tsukasa / Watanabe, Yuya / Yamada, Yosuke / Miyachi, Motohiko / Kimura, Misaka

Medicine and science in sports and exercise

2023 Volume 55, Issue 6, Page(s) 1044–1053

Abstract: Purpose: Whether the association between objectively assessed physical activity and mortality differs between adults with versus those without frailty is unclear. We investigated this association in community-dwelling older adults.: Methods: This ... ...

Abstract	Purpose: Whether the association between objectively assessed physical activity and mortality differs between adults with versus those without frailty is unclear. We investigated this association in community-dwelling older adults. Methods: This prospective study used the data of 4165 older adults 65 yr or older from the Kyoto-Kameoka study in Japan who wore a triaxial accelerometer (EW-NK52). The number of steps was classified by quartiles using the average daily value of data obtained from the accelerometer across four or more days. Frailty was evaluated using the validated Kihon Checklist. We evaluated the association between mortality and daily steps using a multivariable Cox proportional hazards analysis and restricted spline model. Results: The average daily steps for the first, second, third, and fourth quartiles were 1786, 3030, 4452, and 7502, respectively. In total, 113 deaths were recorded during a median follow-up of 3.38 yr (14,061 person-years). After adjusting for confounders, the top quartile was associated with a lower hazard ratio (HR) for mortality than the bottom quartile (HR = 0.39, 95% confidence interval = 0.18-0.85). In a stratified model by frailty status, the daily step count dose-response curve at which the HR for mortality plateaued among nonfrail individuals was approximately 5000-7000 steps per day. By contrast, the daily step count showed an inverse relationship with mortality at approximately 5000 steps or more per day in frail individuals. Conclusions: The relationship between daily steps and mortality is different between those with and those without frailty, and people with frailty may require more daily steps than those with nonfrailty to achieve the inverse relationship with mortality. These findings may be useful for informing future physical activity guidelines.
MeSH term(s)	Humans ; Aged ; Frailty ; Frail Elderly ; Prospective Studies ; Independent Living ; Exercise
Language	English
Publishing date	2023-02-01
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	603994-7
ISSN	1530-0315 ; 0195-9131 ; 0025-7990
ISSN (online)	1530-0315
ISSN	0195-9131 ; 0025-7990
DOI	10.1249/MSS.0000000000003133
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Zs.A 869: Show issues

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Article ; Online: Doubly labelled water-calibrated energy intake associations with mortality risk among older adults.

Watanabe, Daiki / Yoshida, Tsukasa / Watanabe, Yuya / Kimura, Misaka / Yamada, Yosuke

Journal of cachexia, sarcopenia and muscle

2022 Volume 14, Issue 1, Page(s) 214–225

Abstract: Background: The body mass index (BMI) is closely related to mortality risk, and energy intake (EI) is essential for maintaining energy balance in weight control. However, self-reported EI has been shown to lead to a systematic underestimation. Total ... ...

Abstract	Background: The body mass index (BMI) is closely related to mortality risk, and energy intake (EI) is essential for maintaining energy balance in weight control. However, self-reported EI has been shown to lead to a systematic underestimation. Total energy expenditure measured using the doubly labelled water (DLW) method is considered an objective biomarker of EI and the gold standard for its estimation in individuals with stable body weight. We aimed to examine the association between DLW-calibrated EI and BMI on overall mortality risk in older adults. Methods: A prospective cohort study was performed using data of 8051 (4267 women and 3784 men) Japanese older adults from the Kyoto-Kameoka Study in Japan. Calibrated EI was calculated from the estimated EI using a food frequency questionnaire and equation developed based on DLW. Participants were classified by quartiles based on their EI stratified by sex. BMI was calculated using self-reported height and body weight. Mortality data were collected between 30 July 2011 and 30 November 2016. Statistical analysis was performed using the multivariable-adjusted Cox proportional hazard model with a restricted cubic spline. Results: The 8051 participants' mean (standard deviation) age and BMI were 73.5 (6.1) years and 22.6 (3.0) kg/m Conclusions: Calibrated EI was negatively associated with mortality risk but not uncalibrated EI. This may be mediated by an increase in body weight over time. Caution is required when interpreting the association between EI and mortality risk without adjusting for self-reported measurement errors and outcomes.
MeSH term(s)	Male ; Humans ; Female ; Aged ; Prospective Studies ; Energy Intake ; Body Weight ; Body Mass Index ; Water
Chemical Substances	Water (059QF0KO0R)
Language	English
Publishing date	2022-11-25
Publishing country	Germany
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2586864-0
ISSN	2190-6009 ; 2190-5991
ISSN (online)	2190-6009
ISSN	2190-5991
DOI	10.1002/jcsm.13122
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Article ; Online: Oral frailty is associated with mortality independently of physical and psychological frailty among older adults.

Watanabe, Daiki / Yoshida, Tsukasa / Watanabe, Yuya / Yokoyama, Keiichi / Yamada, Yosuke / Kikutani, Takeshi / Yoshida, Mitsuyoshi / Miyachi, Motohiko / Kimura, Misaka

Experimental gerontology

2024 Volume 191, Page(s) 112446

Abstract: Background: Although oral frailty is independently associated with an increased risk of mortality, evidence for the usefulness of screening tools for oral frailty is less than that for physical frailty screening tools. We aimed to investigate the ... ...

Abstract	Background: Although oral frailty is independently associated with an increased risk of mortality, evidence for the usefulness of screening tools for oral frailty is less than that for physical frailty screening tools. We aimed to investigate the relationship between oral frailty and mortality in older adults. Methods: This prospective cohort study included 11,374 adults aged ≥65 years, who provided valid responses to a baseline mail survey questionnaire from the Kyoto-Kameoka study. Oral frailty status was evaluated using the Oral Frailty Index-8 (range, 0 [best] to 10 [worst]). Participants were classified into four categories according to the Oral Frailty Index-8: robust (score, 0-2), oral pre-frailty (score, 3), oral frailty (score, 4-6), and oral severe frailty (score ≥ 7). Physical and psychological frailty were evaluated using the validated frailty-screening index and defined as a score of ≥3 out of a possible 5 points. Mortality data were collected from 30 July 2011 to 30 November 2016. Hazard ratios (HR) for all-cause mortality were calculated using a multivariable Cox proportional hazards model. Results: During the 5.3-year median follow-up period (57,157 person-years), 1184 deaths were recorded. After adjusting for confounders, including physical and psychological frailty, medical history, and lifestyle, in comparison with a robust oral status, oral pre-frailty (HR, 1.29; 95 % confidence interval [CI], 1.02-1.63), oral frailty (HR, 1.22; 95 % CI, 1.01-1.48), and oral severe frailty (HR, 1.43; 95 % CI, 1.16-1.76) were associated with higher HRs of mortality (p for trend = 0.002). Conclusion: Oral frailty is associated with mortality independent of physical and psychological frailty in older adults. The Oral Frailty Index-8 may be useful for identifying individuals at high risk of mortality.
MeSH term(s)	Humans ; Aged ; Female ; Male ; Frailty/mortality ; Frailty/psychology ; Frail Elderly/psychology ; Prospective Studies ; Geriatric Assessment/methods ; Aged, 80 and over ; Japan/epidemiology ; Proportional Hazards Models ; Risk Factors ; Surveys and Questionnaires ; Oral Health
Language	English
Publishing date	2024-04-27
Publishing country	England
Document type	Journal Article
ZDB-ID	390992-x
ISSN	1873-6815 ; 0531-5565
ISSN (online)	1873-6815
ISSN	0531-5565
DOI	10.1016/j.exger.2024.112446
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Article: [Relationship between CT Numbers and Artifacts Obtained Using CT-based Attenuation Correction of PET/CT].

Watanabe, Yuya / Hosokawa, Shota / Otaka, Yutaka / Takahashi, Yasuyuki

Nihon Hoshasen Gijutsu Gakkai zasshi

2020 Volume 76, Issue 9, Page(s) 955–962

Abstract: Purpose: The aim of this study was to clarify the artifacts that occurred in the non-activity signal with computed tomography (CT)-based attenuation correction (CTAC) error due to image misregistration.: Methods: We used a cylindrical phantom ... ...

Abstract	Purpose: The aim of this study was to clarify the artifacts that occurred in the non-activity signal with computed tomography (CT)-based attenuation correction (CTAC) error due to image misregistration. Methods: We used a cylindrical phantom containing a test tube with a diameter of 15 mm as the non-activity signal part. Positron emission tomography (PET) images were acquired for 30 minutes using the phantom with water in the non-activity signal part and Results: As the CT number of the CT images increased, C Conclusions: When the CT number was different from the original in CTAC, the PET value was different. CTAC should be performed with caution as there may be image misregistration.
MeSH term(s)	Artifacts ; Fluorodeoxyglucose F18 ; Positron Emission Tomography Computed Tomography ; Positron-Emission Tomography ; Tomography, X-Ray Computed
Chemical Substances	Fluorodeoxyglucose F18 (0Z5B2CJX4D)
Language	Japanese
Publishing date	2020-09-22
Publishing country	Japan
Document type	Journal Article
ZDB-ID	2269092-X
ISSN	1881-4883 ; 0369-4305
ISSN (online)	1881-4883
ISSN	0369-4305
DOI	10.6009/jjrt.2020_JSRT_76.9.955
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