Kazuki Hotta

Dr. Kazuki Hotta


Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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20 January 2021 in Nutrients
Verified
Journal Article
Open access
PDF file
Tatsuro InoueTatsuro Inoue
Tatsuro Inoue
KMKeisuke Maeda
Keisuke Maeda
NANagano Ayano
Nagano Ayano
ASAkio Shimizu
Akio Shimizu
JUJunko Ueshima
Junko Ueshima
ATAtsuhiro Tsubaki
Atsuhiro Tsubaki
Osteopenia/osteoporosis and sarcopenia are common geriatric diseases among older adults and harm activities of daily living (ADL) and quality of life (QOL). Osteosarcopenia is a unique syndrome that is a concomitant of both osteopenia/osteoporosis and sarcopenia. This review aimed to summarize the related factors and clinical outcomes of osteosarcopenia to facilitate understanding, evaluation, prevention, treatment, and further research on osteosarcopenia. We searched the literature to include meta-analyses, reviews, and clinical trials. The prevalence of osteosarcopenia among community-dwelling older adults is significantly higher in female (up to 64.3%) compared to male (8–11%). Osteosarcopenia is a risk factor for death, fractures, and falls based on longitudinal studies. However, the associations between osteosarcopenia and many other factors have been derived based on cross-sectional studies, so the causal relationship is not clear. Few studies of osteosarcopenia in hospitals have been conducted. Osteosarcopenia is a new concept and has not yet been fully researched its relationship to clinical outcomes. Longitudinal studies and high-quality interventional studies are warranted in the future.

MKMichitaka Kato
Michitaka Kato
FGFumi Green
Fumi Green
KHKazuki Hotta
Kazuki Hotta
TTToshiya Tsukamoto
Toshiya Tsukamoto
YKYasunari Kurita
Yasunari Kurita
HTHisato Takagi
Hisato Takagi
Background: Aerobic exercise is known to reduce arterial stiffness; however, high-intensity resistance exercise is associated with increased arterial stiffness. Stretching exercises are another exercise modality, and their effect on arterial stiffness remains unclear. The purpose of this study was to determine whether stretching exercises reduce arterial stiffness in middle-aged and older adults, performing the first meta-analysis of currently available studies. Methods: We searched the literature for randomized controlled trials (RCTs) and non-RCTs published up to January 2020 describing middle-aged and older adults who participated in a stretching intervention vs. controls without exercise training. The primary and secondary outcomes were changes in arterial stiffness and vascular endothelial function and hemodynamic status. Pooled mean differences (MDs) and standard MDs (SMDs) with 95% confidence intervals (CIs) between the intervention and control groups were calculated using a random effects model. Results: We identified 69 trials and, after an assessment of relevance, eight trials, including a combined total of 213 subjects, were analyzed. Muscle stretching exercises were shown to significantly reduce arterial stiffness and improve vascular endothelial function (SMD: −1.00, 95% CI: −1.57 to −0.44, p = 0.0004; SMD: 1.15, 95% CI: 0.26 to 2.03, p = 0.01, respectively). Resting heart rate (HR) and diastolic blood pressure (DBP) decreased significantly after stretching exercise intervention (MD: −0.95 beats/min, 95% CI: −1.67 to −0.23 beats/min, p = 0.009; MD: −2.72 mm Hg, 95% CI: −4.01 to −1.43 mm Hg, p < 0.0001, respectively) Conclusions: Our analyses suggest that stretching exercises reduce arterial stiffness, HR, and DBP, and improve vascular endothelial function in middle-aged and older adults.

22 May 2019 in The Journal of the International Society of Physical and Rehabilitation Medicine
Verified
Journal Article
Open access
SMShinichiro Morishita
Shinichiro Morishita
ATAtsuhiro Tsubaki
Atsuhiro Tsubaki
KHKazuki Hotta
Kazuki Hotta
JFJack B. Fu
Jack B. Fu
SFShigeo Fuji
Shigeo Fuji
Itioning regimen of frequent high-dose chemotherapy in combination with total body irradiation, followed by infusion of donor-harvested bone marrow or peripheral blood stem cells. As an aggressive and demanding medical therapy that profoundly impacts patient quality of life (QOL), allo-HSCT is associated with numerous treatment-related physical, psychological, and psychosocial side effects. The procedure can result in decreased respiratory and balance function, skeletal muscle strength, and exercise capacity. Thus, as physical exercise has been shown to positively affect physical and psychosocial function and QOL in allo-HSCT patients, it is a recommended intervention for improving essential functions and offsetting lost exercise capacity after the procedure. Furthermore, recent evidence has shown that physical exercise can influence survival rate and mortality in allo-HSCT patients. This review provides an overview of the current research on the effectiveness of physical exercise for allo-HSCT patients....

11 February 2021 in Applied Sciences
Verified
Journal Article
Open access
PDF file
WQWeixiang Qin
Weixiang Qin
SKSho Kojima
Sho Kojima
YYYudai Yamazaki
Yudai Yamazaki
SMShinichiro Morishita
Shinichiro Morishita
KHKazuki Hotta
Kazuki Hotta
ATAtsuhiro Tsubaki
Atsuhiro Tsubaki
Previous studies have indicated that changes in oxygenated hemoglobin concentration (O2Hb) in the prefrontal cortex (PFC) are associated with changes in cognitive function. Therefore, the present study aimed to explore the effect of differences in O2Hb levels in the left and right PFC (L-PFC and R-PFC, respectively) on cognitive function after exercise. This study included 12 healthy male college students. The exercise regimen consisted of 4 min of warm-up and rest each, followed by 20 min of moderate-intensity exercise and 20 min of post-exercise rest. Participants underwent the 2-back cognitive test thrice (pre-exercise, post-exercise, and after the 20 min post-exercise rest period), and their reaction times were recorded. O2Hb levels in the PFC were monitored using functional near-infrared spectroscopy. We analyzed the correlations between changes in post-exercise reaction times and differences in peak O2Hb levels (L-PFC minus R-PFC), area under the curve for O2Hb changes, and increases in the O2Hb slope during exercise. Peak O2Hb, area under the curve (AUC) for O2Hb change, and increase in the slope of O2Hb were significantly correlated with changes in reaction time. These findings provide insight into the mechanism by which O2Hb differences between the L-PFC and R-PFC affect cognitive function.

9 May 2021
Verified
Book Chapter
Closed access
PDF file
KHK. Hashimoto
K. Hashimoto
KHKazuki Hotta
Kazuki Hotta
SMS. Morishita
S. Morishita
RKR. Kanai
R. Kanai
HTH. Takahashi
H. Takahashi
ATA. Tsubaki
A. Tsubaki

9 May 2021
Verified
Book Chapter
Closed access
PDF file
DSD. Sato
D. Sato
SMS. Morishita
S. Morishita
KHKazuki Hotta
Kazuki Hotta
YIY. Ito
Y. Ito
ASA. Shirayama
A. Shirayama
ATA. Tsubaki
A. Tsubaki