Papers - KATAYOSE Masaki

Effects of inspiratory muscle metaboreflex on cerebral circulation at rest and during light-intensity exercise in healthy males.

Kohei Sato, Tatsuki Kamoda, Rintaro Sakamoto, Keisho Katayama, Toru Neki, Masaki Katayose, Erika Iwamoto

Respiratory physiology & neurobiology     104422 - 104422  2025.03  [International journal]

　View Summary

PURPOSE: This study aimed to clarify the effects of inspiratory muscle metaboreflex on cerebral circulation at rest and during exercise. METHODS: Twelve young males randomly completed two trials (rest and exercise [leg cycling at 40% peak oxygen uptake] trials) on separate days. In each trial, the internal carotid artery (ICA), an index of cerebral circulation, was measured using Doppler ultrasound 2min after inspiratory loading breathing (IL condition) or non-loading breathing (control condition). During ICA assessments, participants engaged in 3min of spontaneous breathing (SB), followed by 3min of isocapnic hyperventilation (IHV). RESULTS: ICA conductance was lower in the IL condition than in the control condition in both rest and exercise trials. Inspiratory mucle metaboreflex did not reduce ICA blood flow during SB but decreased it during IHV in both trials. CONCLUSION: Our findings suggest that inspiratory muscle metaboreflex could decrease cerebrovascular conductance from rest to light-intensity exercise and attenuates cerebral blood flow with increased respiratory muscle work.

DOI PubMed

Dilatory responsiveness of the internal carotid artery to shear stimulus is constant under different levels of transient hypercapnia.

Rintaro Sakamoto, Tatsuki Kamoda, Shigehiko Ogoh, Kohei Sato, Masaki Katayose, Toru Neki, Erika Iwamoto

Journal of applied physiology (Bethesda, Md. : 1985)   138 ( 2 ) 397 - 403  2025.02  [International journal]

　View Summary

Peripheral endothelial function, which accounts for the variability in shear stimulus, can be assessed using shear-mediated dilation normalized to the increased shear stimulus. Similarly, shear-mediated dilation of the internal carotid artery (ICA), an index of cerebrovascular endothelial function, should be normalized to increased shear stimulus. However, this approach has not yet been validated. Thus, the shear-mediated dilation of the ICA was assessed in 14 young adults during three levels of transient hypercapnia, induced by elevating the partial pressure of end-tidal carbon dioxide for 30 s by 6, 9, and 12 mmHg. The ICA shear rate (SR) was calculated using the ICA diameter and velocity, both measured by Doppler ultrasound. The total vasodilator stimulus was quantified as the SR area under the curve from the onset of hypercapnia to peak dilation, including and excluding baseline values [(SRAUC) and delta SRAUC (DSRAUC), respectively]. Shear-mediated dilation was calculated as the percent increase in diameter from baselines. ICA dilation was positively associated with DSRAUC [r(rm) = 0.47, P < 0.01] but not with SRAUC [r(rm) = 0.32, P = 0.09]. Consequently, ICA dilation normalized to DSRAUC did not differ among trials (main effect of rial, P = 0.77). Contrarily, the difference in ICA dilation among trials remained significant when normalized to SRAUC (main effect of trial, P = 0.02). Therefore, normalized shear-mediated dilation using DSRAUC can reduce variability associated with increased shear stimulus during ICA dilation assessment, thereby enhancing the validity of evaluating cerebrovascular endothelial function.NEW & NOTEWORTHY This study demonstrated that shear-mediated dilation of the internal carotid artery (ICA), an index of cerebrovascular endothelial function, increased with the increase of shear stimulus induced by different degrees of transient hypercapnia. However, when ICA dilation was normalized to the total increased shear stimulus above baseline, the vasodilation became comparable across different hypercapnia levels. Thus, normalizing ICA dilation to the total shear stimulus increased from baseline may enhance the validity of assessing cerebrovascular endothelial function.

DOI PubMed

Fifth Lumbar Vertebral Shape in Early-Stage Lumbar Spondylolysis: Three-Dimensional Bone Morphology Analysis Using Homologous Models

Yuji Yamane, Hajime Toda, Masaki Katayose

Spine Surgery and Related Research ( Japanese Society for Spine Surgery and Related Research )  9 ( 1 ) 78 - 86  2025.01

DOI

Prognostic implication of sarcopenia diagnosed by updated Asian Working Group for Sarcopenia criteria in older patients with heart failure: Utility and limitation

Satoshi Katano, Kotaro Yamano, Toshiyuki Yano, Ryo Numazawa, Ryohei Nagaoka, Suguru Honma, Yusuke Fujisawa, Yasuhiro Miki, Yuhei Takamura, Hayato Kunihara, Hiroya Fujisaki, Hidemichi Kouzu, Katsuhiko Ohori, Masaki Katayose, Akiyoshi Hashimoto, Masato Furuhashi

The Journal of nutrition, health and aging ( Elsevier BV )  29 ( 1 ) 100434 - 100434  2025.01

DOI

Relationship Between Scapular Position During Maximum Voluntary Isometric Contraction Of Shoulder Flexion and Scapular Position During Baseball Pitching

Nomura Yuki, Toda Hajime, Saizaki Kazuya, Asano Shu, Yamashita Hirokatsu, Iida Naoya, Kodesho Taiki, Watanabe Shun, Yoshida Masahiro, Yoshida Makoto, Yamamoto Keizo, Katayose Masaki

Japanese Journal of Sports Physical Therapy ( Japanese Society of Sports Physical Therapy )  3 ( 1 ) 6 - 12  2025

　View Summary

Objective: This study aimed to investigate the between scapular position during maximal isometric shoulder flexion and scapular position during baseball pitching. Methods: We recruited fifteen collegiate baseball players and used an optical motion tracking system to assess scapular position. The scapula position during maximal isometric shoulder flexion was defined as the amount of change in the scapular internal rotation, downward rotation, and anterior tilt angle from the time of resting position to the time of maximum muscle exertion. We assessed scapular position at foot contact (FC), maximum shoulder external rotation (MER), and ball release of pitching motion. Results: The amount of change in the scapular internal rotation angle during maximal isometric shoulder flexion had a significant relationship with the scapular internal rotation angle at FC (r＝0.55, p＝0.033) and MER (r＝0.52, p＝0.047). Conclusion: This finding suggest that the evaluation of amount of change in the scapular internal rotation angle during maximal isometric shoulder flexion can be a useful screening method to predict excessive scapular internal rotation at FC and MER of pitching.

DOI

Passive muscle tension changes in the biceps femoris long head after biceps femoris short head detachment: A human cadaver study.

Gakuto Nakao, Kazuma Yamagata, Risa Adachi, Koki Ishiyama, Kazuyoshi Kozawa, Kota Watanabe, Yuki Ohsaki, Kousuke Shiwaku, Norio Hayashi, Masaki Katayose, Keigo Taniguchi

Journal of biomechanics   179   112480 - 112480  2024.12  [International journal]

　View Summary

The functional role of the biceps femoris short head (BFsh) remains unclear. Clarifying the functional role of each biceps femoris head may provide useful insights into the reduction of biceps femoris long head (BFlh) injuries. This study aimed to clarify whether the passive tension in the BFlh would change with BFsh detachment using cadavers. The shear modulus of the BFlh and BFsh was measured using ultrasonic shear wave elastography as an index of passive tension in three tissue processing conditions (intact, removal of all tissues from skin to deep fascia, and BFsh detachment) in four limb positions, with hip [H0°, H90°] and knee [K0°, K90°] joint angles under each tissue processing condition. The measurement site was the distal 30 % of the line connecting the sciatic tuberosity (100 %) and fibular head (0 %). Three-way analysis of variance was conducted with muscles, tissue processing, and positions as factors, which revealed a significant interaction (P < 0.01). The post-test results indicated that the BFlh was significantly higher than the BFsh at H90° and K0° before tissue processing; however, no difference was observed between the muscles after skin and deep fascia removal. After BFsh detachment, the shear modulus of the BFsh decreased, whereas that of the BFlh significantly increased (P < 0.01), suggesting that the BFsh might be involved in the passive tension reduction of the BFlh in a lengthened position, as the shear modulus of the BFlh increased after detachment.

DOI PubMed

Effect of tasks on intramuscular regional differences in rectus femoris elasticity during isometric contraction: An ultrasound shear wave elastography study.

Taiki Kodesho, Kazuma Yamagata, Gakuto Nakao, Masaki Katayose, Keigo Taniguchi

Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology   80   102967 - 102967  2024.12  [International journal]

　View Summary

PURPOSE: This study aimed to investigate intramuscular regional differences and task specificity of rectus femoris (RF) elasticity during isometric contraction. METHODS: Sixteen healthy males (aged 24.3 ± 4.1 years) participated in this study. The tasks included isometric hip flexion (HF) and knee extension (KE). The contractions were maintained at 0%, 30%, and 60% of their respective maximum voluntary isometric contraction (MVC) forces for 5 s each at 50˚ hip flexion and 90˚ knee flexion. RF elasticity was measured in two regions, proximal (33%) and distal (67%). The shear modulus (kPa), measured by shear wave elastography, was used to determine RF elasticity. RESULTS: A significant interaction effect was observed (intensity × region × task) (P = 0.01). Regarding regional differences during contraction, the proximal region exhibited a greater shear modulus than the distal region at 60% MVC in the hip flexion task (P = 0.001). Conversely, no regional differences were observed at either 30% MVC (P = 0.625) or 60% MVC (P = 0.568) in the knee extension task. DISCUSSION: Muscle shear modulus during contraction reflects active force, suggesting that mechanical stress can be applied primarily to the proximal region of the RF during the HF task.

DOI PubMed

大腿二頭筋短頭の剥離に伴う大腿二頭筋長頭の受動張力変化

中尾 学人, 谷口 圭吾, 山形 一真, 足立 梨紗, 石山 輝希, 小澤 和祥, 渡邉 耕太, 大崎 雄樹, 林 典雄, 塩泡 孝介, 片寄 正樹, 金谷 耕平

日本整形外科超音波学会学術集会プログラム・抄録集 ( (一社)日本整形外科超音波学会 )  35回   119 - 119  2024.10

超音波研究から生まれた新しい理学療法技術 超音波研究が切り拓く力学ストレス評価の可能性

谷口 圭吾, 中尾 学人, 小出所 大樹, 加藤 拓也, 飯田 尚哉, 片寄 正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( (一社)日本整形外科超音波学会 )  35回   47 - 47  2024.10

女性アスリート支援ネットワーク構築への取り組み 北海道スポーツ医科学コンソーシアムにおける女性アスリートへの健康支援活動

寒川 美奈, 蜂谷 愛, 笠師 久美子, 片寄 正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 )  32 ( 4 ) S137 - S137  2024.10

Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching

Yuki Nomura, Hajime Toda, Masaki Katayose, Shun Watanabe, Masahiro Yoshida, Makoto Yoshida, Keizo Yamamoto

JSES International ( Elsevier BV )   2024.08

DOI

Validity of Elastic Imaging Evaluation of Hamstring Muscles With Knee Contracture Using Ultrasound Shear Wave Elastography.

Gakuto Nakao, Taiki Kodesho, Kazuma Yamagata, Kota Watanabe, Yuki Ohsaki, Masaki Katayose, Keigo Taniguchi

Cureus   16 ( 8 ) e68343  2024.08  [International journal]

　View Summary

PURPOSE: This study used ultrasound shear wave elastography (SWE) to evaluate the mechanical properties of hamstring muscles from cadaveric specimens with knee flexion contractures. METHODS: Hamstring muscles for tensile testing were harvested from Thiel soft-embalmed cadavers with and without knee flexion contracture. Muscle specimens were mounted on a testing machine. The initial load detected when a tensile load was applied to the distal end was used as the slack length. The cross-sectional areas of the muscle at slack length were measured at the proximal and distal sites using B-mode ultrasonography. Subsequently, the muscle specimen was elongated from the slack length to 8% strain, with the shear modulus measured using SWE. Young's modulus (stress/strain) was calculated based on the displacement and tensile force obtained from the tensile test. RESULTS: Regression analysis showed a significant positive linear relationship between the Young's and shear moduli for all specimens at all the sites (P < 0.01 and coefficient of determination: 0.95-0.99). The Young's and average shear moduli at the proximal and distal sites were higher in all hamstring muscles with contractures than in those without contractures. CONCLUSIONS: SWE can be used to estimate Young's moduli of hamstring muscles with contractures. Muscle specimens with contractures exhibited higher resistance to elongation, thereby indicating that their mechanical properties differed from those of muscles without contractures.

DOI PubMed

大腿二頭筋長頭の力学的特性 弾性部位差と伸長速度間の応力差

中尾 学人, 山形 一真, 足立 梨紗, 石山 輝希, 小澤 和祥, 小出所 大樹, 渡邉 耕太, 大崎 雄樹, 片寄 正樹, 谷口 圭吾

体力科学 ( (一社)日本体力医学会 )  73 ( 4 ) 179 - 179  2024.08

大腿二頭筋長頭の力学的特性 弾性部位差と伸長速度間の応力差

中尾 学人, 山形 一真, 足立 梨紗, 石山 輝希, 小澤 和祥, 小出所 大樹, 渡邉 耕太, 大崎 雄樹, 片寄 正樹, 谷口 圭吾

体力科学 ( (一社)日本体力医学会 )  73 ( 4 ) 179 - 179  2024.08

Associations between in‐hospital daily protein intake and adverse clinical outcomes in older patients with heart failure

Satoshi Katano, Toshiyuki Yano, Kotaro Yamano, Ryo Numazawa, Ryohei Nagaoka, Suguru Honma, Yusuke Fujisawa, Katsuhiko Ohori, Hidemichi Kouzu, Hayato Kunihara, Hiroya Fujisaki, Masaki Katayose, Akiyoshi Hashimoto, Masato Furuhashi

ESC Heart Failure ( Wiley )   2024.05

　View Summary

Abstract Aims The adverse effects of low daily protein intake (DPI) on clinical outcomes in patients with heart failure (HF) are known; however, an optimal DPI to predict event adverse outcomes remains undetermined. Moreover, whether protein restriction therapy for chronic kidney disease is applicable in patients with HF and renal dysfunction remains unclear. Methods and results In this single‐centre, ambispective cohort study, we included 405 patients with HF aged ≥65 years (mean age, 78.6 ± 7.5 years; 50% women). DPI was estimated from consumption over three consecutive days before discharge and normalized relative to the ideal body weight [IBW, 22 kg/m² × height (m)²]. The primary outcome was a composite of all‐cause mortality and HF‐related readmission within the 2 year post‐discharge period. Results During an average follow‐up period of 1.49 ± 0.74 years, 100 patients experienced composite events. Kaplan–Meier survival curves revealed a significantly lower composite event‐free rate in patients within the lowest quartile of DPI than in the upper quartiles (log‐rank test, P = 0.02). A multivariate Cox proportional hazards analysis after adjusting for established prognostic markers and non‐proteogenic energy intake revealed that patients in the lowest DPI quartile faced a two‐fold higher risk of composite events than those in the highest quartile [hazard ratio (HR), 2.03; 95% confidence interval (CI), 1.08–3.82; P = 0.03]. The composite event risk linearly increased as DPI decreased (P for nonlinearity = 0.90), with each standard deviation (0.26 g/kg IBW/day) decrease in DPI associated with a 32% increase in composite event risk (HR, 1.32; 95% CI, 1.10–1.71; P = 0.04). There was significant heterogeneity in the effect of DPI, with the possible disadvantage of lower DPI in patients with HF with cystatin C‐based estimated glomerular filtration rate <30 mL/min/1.73 m². The cutoff value of DPI for predicting the occurrence of composite events calculated from the Youden index was 1.12 g/kg IBW/day. Incorporating a DPI < 1.12 g/kg IBW/day into the baseline model significantly improved the prediction of post‐discharge composite events (continuous net reclassification improvement, 0.294; 95% CI, 0.072–0.516; P = 0.01). Conclusions Lower DPI during hospitalization is associated with an increased risk of mortality and HF readmission independent of non‐proteogenic energy intake, and the possible optimal DPI for predicting adverse clinical outcomes is >1.12 g/kg IBW/day in older patients with HF. Caution is warranted when protein restriction therapy is administered to older patients with HF and renal dysfunction.

DOI

Stress–strain relationship of individual hamstring muscles: A human cadaver study

Gakuto Nakao, Taiki Kodesho, Kazuma Yamagata, Kota Watanabe, Yuki Ohsaki, Masaki Katayose, Keigo Taniguchi

Journal of the Mechanical Behavior of Biomedical Materials ( Elsevier BV )  153   106473 - 106473  2024.05

DOI

Correction: Relationship between shear elastic modulus and passive muscle force in human hamstring muscles using a Thiel soft-embalmed cadaver.

Gakuto Nakao, Taiki Kodesho, Takuya Kato, Yu Yokoyama, Yuhei Saito, Yuki Ohsaki, Kota Watanabe, Masaki Katayose, Keigo Taniguchi

Journal of medical ultrasonics (2001)    2024.03  [Domestic journal]

DOI PubMed

Acute aerobic exercise enhances cerebrovascular shear-mediated dilation in young adults: the role of cerebral shear.

Rintaro Sakamoto, Tatsuki Kamoda, Kohei Sato, Shigehiko Ogoh, Masaki Katayose, Toru Neki, Erika Iwamoto

Journal of applied physiology (Bethesda, Md. : 1985)   136 ( 3 ) 535 - 548  2024.03  [International journal]

　View Summary

Exercise-induced increases in shear rate (SR) acutely improve peripheral endothelial function, but the presence of this mechanism in cerebral arteries remains unclear. Thus, we evaluated shear-mediated dilation of the internal carotid artery (ICA), which is an index of cerebrovascular endothelial function, before and after exercise. Shear-mediated dilation was measured with 30 s of hypercapnia in 16 young adults before and 10 min after 30 min of sitting rest (CON) or three cycling exercises on four separate days. The target exercise intensity was 80% of oxygen uptake at the ventilatory threshold. To manipulate the ICA SR during exercise, participants breathed spontaneously (ExSB, SR increase) or hyperventilated without (ExHV, no increase in SR) or with ([Formula: see text], restoration of SR increase) addition of CO2 to inspiratory air. Shear-mediated dilation was calculated as a percent increase in diameter from baseline. Doppler ultrasound measures ICA velocity and diameter. The CON trial revealed that 30 min of sitting did not alter shear-mediated dilation (4.34 ± 1.37% to 3.44 ± 1.23%, P = 0.052). ICA dilation after exercise compared with preexercise levels increased in the ExSB trial (3.32 ± 1.37% to 4.74 ± 1.84%, P < 0.01), remained unchanged in the ExHV trial (4.07 ± 1.55% to 3.21 ± 1.48%, P = 0.07), but was elevated in the [Formula: see text] trial (3.35 ± 1.15% to 4.33 ± 2.12%, P = 0.04). Our results indicate that exercise-induced increases in cerebral shear may play a crucial role in improving cerebrovascular endothelial function after acute exercise in young adults.NEW & NOTEWORTHY We found that 30-min cycling (target intensity was 80% of the ventilatory threshold) with increasing shear of the internal carotid artery (ICA) enhanced transient hypercapnia-induced shear-mediated dilation of the ICA, reflecting improved cerebrovascular endothelial function. This enhancement of ICA dilation was diminished by suppressing the exercise-induced increase in ICA shear via hyperventilation. Our results indicate that increases in cerebral shear may be a key stimulus for improving cerebrovascular endothelial function after exercise in young adults.

DOI PubMed

せん断波イメージングを用いた筋の粘弾性評価 静的ストレッチングの効果検証と関節可動性との関係

小出所 大樹, 谷口 圭吾, 中尾 学人, 山形 一真, 渡邉 耕太, 片寄 正樹, 寺本 篤史

日本整形外科学会雑誌 ( (公社)日本整形外科学会 )  98 ( 3 ) S1359 - S1359  2024.03

ハムストリングスの局所的な力学特性 Thiel法固定献体を用いた検討

中尾 学人, 谷口 圭吾, 小出所 大樹, 山形 一真, 渡邉 耕太, 大崎 雄樹, 片寄 正樹, 寺本 篤史

日本整形外科学会雑誌 ( (公社)日本整形外科学会 )  98 ( 3 ) S1379 - S1379  2024.03