Tetsuro Hirayama
| Faculty of Health Care and Medical Sports,Department of Rehabilitation,Physical Therapy Major | Lecturer |
| Faculty of Health Care and Medical Sports,Department of Physical Therapy | Lecturer |
| Graduate School of Health Sciences,Master's and Doctoral Programs in Physical Therapy | Lecturer |
Last Updated :2025/10/21
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Degree
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Educational Background
■Research activity information
Paper
- Throwing kinematics and elbow varus torque relative to ball size in junior baseball players.
Naoki Tanaka; Yasutomo Sakai; Yosuke Maruyama; Tetsuro Hirayama; Wataru Iwamoto; Koji Wagatsuma
Journal of physical therapy science, Jan. 2022
[Purpose] The purpose of this study was to investigate changes in the shoulder and elbow joint angles, upper limb angular velocities, and elbow varus torque when throwing balls of two different sizes. [Participants and Methods] The pitching motion of 26 junior baseball players was analyzed using an optical motion capture system. The balls used were a standard baseball and a small ball of equal weight. Shoulder external rotation/abduction and elbow flexion were measured. The maximum values of shoulder joint internal rotation, elbow joint extension, wrist flexion angular velocity, and elbow joint varus torque were also evaluated. The ball velocity was determined as an index of pitching performance. [Results] The shoulder external rotation and elbow flexion angles were higher when pitching with a small ball. The joint angular velocity was also significantly higher when pitching with a small ball for all items examined. The ball speed was significantly higher with the small ball. The maximum varus torque of the elbow joint divided by the ball velocity was significantly lower for the small ball. [Conclusion] For a junior baseball player with a small hand length, using a small ball enables pitching with low stress on the elbow joint. - Relations of Asymmetry in the Thickness of the Latissimus Dorsi Muscles to Pelvic Lateral Tilt Angle and Respiratory Function during Forced Expiration in Healthy Young Adult Males
茂原亜由美; 茂原亜由美; 本間友貴; 平山哲郎; 石田行知; 柿崎藤泰; 泉崎雅彦
理学療法科学, 2019 - Relations of Bilateral Symmetry in the Cross-sectional Area of the Quadratus Lumborum Muscles to Posture in the Frontal Plane and Respiratory Function in Forced Breathing
本間友貴; 本間友貴; 平山哲郎; 平山哲郎; 茂原亜由美; 茂原亜由美; 石田行知; 柿崎藤泰; 泉崎雅彦
理学療法科学, 2018 - Effects of the Features of Thoracic Shape at Rest on Thoracic Mobility and Respiratory Function
平山哲郎; 平山哲郎; 本間友貴; 茂原亜由美; 柿崎藤泰; 泉崎雅彦
理学療法科学, 2018 - Instantaneous changes in respiratory function induced by passive pelvic suspension in the supine position in relation to increased diaphragm excursion.
Tatsuya Ishizuka; Naoya Nishida; Yuuki Homma; Tetsuro Hirayama; Yukisato Ishida; Fujiyasu Kakizaki; Masato Konishi
Journal of physical therapy science, Mar. 2017
[Purpose] This study aimed to introduce an approach of pelvic suspension (PS) using sling cords and to obtain evidence for changes in respiratory function of healthy subjects. [Subjects and Methods] Subjects were 25 healthy men. In the supine position, with hip and knee joints flexed at 90°, the subjects' pelvises were suspended with sling belts. Diaphragm excursion, respiratory function, and respiratory comfort in these postures were measured using ultrasonography, respirometry, and visual analog scale (VAS), respectively. [Results] When the pelvis was passively suspended with sling cords, the diaphragm moved 5 mm cranially and diaphragm excursion showed an instantaneous increase compared with the control. The tidal volume (VT) showed an increase and the respiration rate (RR) showed a decrease. The extent of diaphragm excursion was correlated with changes in VT under the control and PS conditions. Independent measurements of pulmonary function revealed that PS reduced the expiratory reserve volume, being correlated positively and negatively to increases in vital and inspiratory capacities, respectively. Furthermore, VAS values for respiratory ease were greater with PS than with the control. [Conclusion] These results suggest that PS effectively changed diaphragm excursion and respiratory function, leading to ease of breathing (i.e., deep and slow respiration). - 努力呼吸における胸郭形状の解析－呼吸機能と胸郭形状の関係性について－
Mar. 2014 - Effects of Sole Grounding Timing and a Heel-arch Pad on Lower Limb Muscle Activities during Gait
財前知典; 小関博久; 小関博久; 田中亮; 川崎智子; 小関貴子; 多米一矢; 平山哲郎; 小関泰一; 川間健之介
理学療法科学, 2013 - Effect of a Heel-arch Pad on the Acceleration of the Knee Joint and Anterior Pelvis in Walking
財前知典; 小関博久; 小関博久; 多米一矢; 川崎智子; 小谷貴子; 田中亮; 平山哲郎; 小関泰一; 清川一樹; 川間健之介
理学療法科学, 2011 - Effect on Femoral Muscles and Hip Abduction in Gait of a Long Pad Used as an Iritani-type Arch Support
財前知典; 小関博久; 小関博久; 小関泰一; 小谷貴子; 田中亮; 平山哲郎; 多米一矢; 川崎智子; 清川一樹; 川間健之介
理学療法科学, 2010
Books and other publications
Lectures, oral presentations, etc.
- 安静時における胸郭形状の特徴が胸郭可動性と呼吸機能に及ぼす影響(学位甲)
Apr. 2018 - 強制呼吸での腰方形筋断面積の左右対称性と前額面上の姿勢、呼吸機能の関係(学位甲)
Apr. 2018 - 胸郭形状の非対称性に対する分析における検討 胸郭形状の非対称性の強さと換気能との関係
Apr. 2017 - 体幹の側方偏位が腹直筋、側腹筋群筋厚および呼吸機能に及ぼす影響
Oct. 2016 - 頸椎の肢位変化が胸郭形状に及ぼす影響 矢状面における検討
Oct. 2016 - 骨盤挙上運動における腰方形筋の収縮性と第12肋骨位置変化の左右特性について 腰背部筋と側腹筋の関与を考慮して
Oct. 2016 - 骨盤前後傾運動における胸郭-骨盤間の運動学的解析
Oct. 2016 - 安静時における胸郭形状の特徴が努力呼吸に及ぼす影響 胸郭可動性と呼吸機能に着目して
Oct. 2016 - Effects of different sitting posture on lateral deviation of thoracic shape and respiratory function
Oct. 2016 - Different roles of left and right lumber erector spinae muscles in the trunk rotation induced by the pelvis forward tilting
Oct. 2016 - Different Head Tilting between Leftward and Rightward Neck Bending Motions
Oct. 2016 - Asymmetric Relationship in Movements between Thorax and Pelvis during Squat
Oct. 2016 - 胸郭形状が肩甲骨角度に及ぼす影響 安静および回旋時の検証
Sep. 2016 - スクワット動作における胸郭形状と骨盤運動の解析
Aug. 2016 - 体幹の側方偏位が腹直筋、側腹筋群筋厚および呼吸機能に及ぼす影響
Aug. 2016 - 頸椎の肢位変化が胸郭形状に及ぼす影響 矢状面における検討
Aug. 2016 - 骨盤前後傾運動における胸郭-骨盤間の運動学的解析
Aug. 2016 - 安静座位における上半身重心点の位置と左右肩甲帯周囲筋活動の特徴
Jul. 2016 - Laterally selective stimulation of laterodorsal muscles affects the bilateral deviation in trunk alignment
Jul. 2016 - Effects of flexion-extension in upper and lower cervical spines on the lateraIity of upper and lowert thoracic shapes
Jul. 2016 - Effects of variation in trunk lateral deviation on respiratory function in relation to thicknesses of rectus abdominis and lateral abdominal group muscles
Jul. 2016 - Asymmetric effects of shoulder joint internal and external rotations on the thorax shape, scapular angle and humeral head deviation
May 2016 - Carrying angleの違いが前腕回内機能に及ぼす影響
Jul. 2015 - Relation between deviation of trunk and rectus abdominis muscle thickness and respiratory function
Jun. 2015 - Characteristic lateral changes in upper thoracic shape and sitting ground reaction pressure associated with lateral neck bending
Jun. 2015 - Segmental movements between cervical rotation and lateral thoracic shape change:The manner of increased or decreased deviation in thoracic shape upon cervical rotation
Jun. 2015 - Restriction of thoracic induced by lateral deviation of upper and lower thorax
Jun. 2015 - 努力呼吸における胸郭形状の解析 呼吸機能と胸郭形状の関係性について
Apr. 2015 - 体幹の側方偏位が腹直筋筋厚および呼吸機能に及ぼす影響
Apr. 2015 - 頸椎側屈運動における胸郭形状と座圧の左右特性
Apr. 2015 - 頸椎回旋位が胸郭形状および胸椎偏位に及ぼす影響
Apr. 2015 - Effects of different cervicothoracic spine positions in the supine posture on lateral deviation of upper thorax and respiratory function
Dec. 2014 - Analysis of thoracic shape during forced breathing -Relationship of the thoracic shape and respiratory function-
Dec. 2014 - 股関節回旋可動域が歩行時の骨盤加速度に与える影響
Jul. 2014 - 第5列位置変化が歩行速度および小趾球足底感覚へ与える影響
Jul. 2014 - Laterally different coupling between latissimus dorci and ribs upon push up movement
Sep. 2013 - Laterally different chain movements of thorax upon elevation of left and right arm
Sep. 2013 - Characteristic lateral deviation of upper thorax in respiratory excursion
Sep. 2013 - Thoracic kyphosis affects the asymmetry in thracic shape
Sep. 2013 - Functional relation between placement of the 12th rib and activities of quadratuslumborum
Sep. 2013 - 胸郭形態が肩甲骨外転及び上方回旋，内転及び下方回旋運動に及ぼす影響
Jul. 2013 - The novel approach to determine lateral deviations of thracis and body trunk
Jul. 2013 - 尺屈アライメントと小指外転筋
Sep. 2012 - 足部肢位による起立時の下腿筋活動
Jul. 2012 - Cooperative activities of anterior serratus and external oblique measured by EMG
Jul. 2012 - 胸郭形状が外腹斜筋に及ぼす影響
Apr. 2012 - 骨盤側方加速度に伴う、腰方形筋と股関節外転筋群の筋活動
Jul. 2011 - Reebook TAIKAN着用による姿勢変化 頭頸部角度に着目して
Apr. 2011 - 入谷式足底板における長パッドが股関節外転筋力に与える影響について
Jun. 2010 - 咬合が頸部屈曲動作に及ぼす影響 胸鎖乳突筋筋活動と頭位角度の変化
Mar. 2010 - 入谷式足底板における長パッドが歩行時大腿部筋活動に与える影響について
Mar. 2010 - 下肢外傷後のアライメント変化により仙腸関節をきたした症例～運動連鎖を考慮して～
Jul. 2009 - 体幹機能改善により左膝窩部痛が改善した一症例
Jul. 2009 - Posture Stability Systemベルト装着による肩関節側方挙上運動に及ぼす影響
Mar. 2009 - Study of the influence on the foot pressure by taping in order to change the alignment of the hallus using the Iritani method insole
Aug. 2008 - 脊柱変形が頸部に与える影響－身体重心を考慮して－
Jul. 2008
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