Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
SATOSHI MURAKI Last modified date:2023.07.20

Professor / Physiological Anthropology / Department of Human Life Design and Science / Faculty of Design

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3. Irma Nur Afiah, Hiroki Nakashima, Ping Yeap Loh, Satoshi Muraki, Understanding gait characteristics of Japanese elderly men through joint angle and angular velocity parameters, Jurnal Ilmiah Pendidikan Fisika Al-Biruni, 10.24042/jipfalbiruni.v11i1.11458, 11, 1, 57-68, 2022.04, Studies investigating the walking patterns of elderly men are well documented, however, there has been no investigation of the gait parameters that specifically reflect the walking motion of elderly men. This study aimed to identify reliable gait parameters to represent the walking motion of elderly Japanese men. 33 elderly men (65 to 74.9 years old) and 20 very elderly men (≥ 75 years old) participated. A 3-dimensional motion analysis system was used to collect kinematic data and 52 gait parameters were analyzed namely; spatiotemporal gait, joint angle, and angular velocity parameters (peak value and peak timing at the hip, knee, and ankle joints. Our results showed that walking speed, cadence, walk ratio, gait cycle, peak joint angle timing, and angular velocity parameters significantly differ between elderly men and very elderly men. Delayed peak timing in the joint angle occurred during the terminal stance phase and pre-swing phase. The accurate parameters for walking motion in old Japanese men as they age may result from the peak timing of joint angle parameters and the peak value of angular velocity parameters..
4. Su Young Son, Satoshi Muraki, Yutaka Tochihara, Exploring the appropriate test methods to examine the effects of firefighter personal protective equipment on mobility, FASHION AND TEXTILES, 10.1186/s40691-022-00295-8, 9, 1, 2022.07.
5. Ilham Priadythama, Wen Liang Yeoh, Ping Yeap Loh, Satoshi Muraki, The Effect of the Degree of Freedom and Weight of the Hand Exoskeleton on Joint Mobility Function, ROBOTICS, 10.3390/robotics11020053, 11, 2, 2022.04, This study aims to investigate the effects of the degree of freedom (DOF) and weight of the hand exoskeleton (HE) on hand joint mobility function (ease of movement, movement range) in fine hand use activities. A three-digit passive HE prototype was built to fit each of the 12 participants. Two DOF setups (three DOF, two DOF), two digits' weight levels (70 g, 140 g), and barehand conditions were tested. A productivity task (performed with Standardized-Nine Hole Peg Test) and motion tasks, both performing the tip pinch and tripod pinch, were conducted to measure the task completion time and the range of motion (ROM) of the digit joints, respectively, using a motion capture system. The perceived ease rating was also measured. The results showed that DOF reduction and weight addition caused a significant task completion time increase and rating drop (p
6. Josefa Angelie Revilla, Ilham Priadythama, Ping Yeap Loh, Satoshi Muraki, Effects of various handle shapes and surface profiles on the hand-arm responses and comfort during short-term exposure to handle vibration., Journal of occupational and environmental hygiene, 10.1080/15459624.2022.2063877, 1-17, 2022.05, The magnitude of hand- (HTV) and wrist- (WTV) transmitted vibration can negatively impact upper limb responses even during short-term exposure. This study aimed to establish the effects of various handle-grip designs on the harmful impacts of vibration, sustained grip exertion, and unnatural posture. The primary focus was to investigate how using a handle grip and how three shapes with two surface profiles affect HTV, WTV, and forearm muscle activities during exposure. The secondary goal was to evaluate the immediate effects on fundamental hand functions, perceived discomfort/comfort, and perceived vibration level after exposure. The final objective was to assess which of the handle designs had the least harmful effects. Fourteen young male adults were recruited and asked to consistently grip a vibrating handle structure for 2 min while the primary parameters were recorded. Pre- and post-task measurements of secondary parameters were recorded on the six design conditions and one control condition (no handle grip). The study found that implementing a regular circular-smooth handle resulted in lower transmitted vibrations, leading to lower upper-limb discomfort, higher grip comfort, and lower perceived vibration. Additionally, shape significantly affected HTV, resulting in grip strength reduction, while surface profile did not influence transmitted vibrations but significantly impacted ring and small finger sensitivity, finger and hand discomfort, and grip comfort. Finally, forearm muscle activities were unaffected, and no significant interaction effects were observed. Circular handles also had the least negative impacts, and elliptic handles had the most negative impacts on the upper extremity because of the level of hand-handle contact stress and hand-grip effort. Meanwhile, the uneven distribution of vibration on the fingers and palm imposed by the rounded spikes on the patterned surface led to decreased finger sensitivity, higher discomfort, and lower grip comfort. Therefore, when machine operation involves moderate grip exertion, pronated forearm posture, and short-term handle vibration exposure, implementing a hard-solid handle with less hand-handle contact area, less grip effort, and even texture is recommended..
7. Choi, Jeewon; Ogawa, Takeru; Takesue, Shin; Muraki, Satoshi; Inoue, Youki; Abe, Hikari; Yamanoi, Emi, Different flooring surfaces affect infants' crawling performance, APPLIED ERGONOMICS, 10.1016/j.apergo.2021.103553, 98, 2022.01, 乳児のハイハイ動作が床の違いによってどのように変化するかを解明した。.
8. Wen Liang Yeoh, Jeewon Choi, Ping Yeap Loh, Seiji Saito, Satoshi Muraki, Users’ Adaptations to the Proportional Speed Control of A Motorised Walker, Disability and Rehabilitation: Assistive Technology, 10.1080/17483107.2021.2017031, 2021.12.
9. Angelie Revilla, Josefa; Loh, Ping Yeap; Muraki, Satoshi, Effects of two grip force levels and forearm postures on hand-arm transmitted vibration and physiological responses, HUMAN FACTORS AND ERGONOMICS IN MANUFACTURING & SERVICE INDUSTRIES, 10.1002/hfm.20935, 31, 6, 679-692, 2021.11.
10. Wang Y, Loh PY, Muraki S, Motor control characteristics of upper limbs in response to assistive forces during bilateral tasks, PLoS ONE,, 16, 1, e0245049, 2021.01, 近年、開発が進んでいるパワースーツ(人間の関節動作をアシスト)が有効的に働くためには、人間の反応と外的な力が適切に協調する必要がある。本研究は両腕による等尺性肘関節屈曲運動を外的な力によりアシストする際、左右のアシスト比率を複数条件設け、主働筋(上腕二頭筋)と拮抗筋(上腕三頭筋)の筋活動(筋電図)、動作の安定性および主観的強度から望ましいアシスト条件を検討した。.
11. Influence of Wearable Walking Assistance on Gait and Subjective Evaluation of HealthyYoung Adults.
12. Jeewon Choi, Wen Liang Yeoh, Ping Yeap Loh, Satoshi Muraki, Motor performance patterns between unilateral mechanical assistance and bilateral muscle contraction, International Journal of Industrial Ergonomics, 10.1016/j.ergon.2020.103056, 80, 103056-103056, 2020.11.
13. Satoshi Muraki, Preferable home environment for the independent elderly to prevent falls and maintain activities of daily living, Ageing in Place: Design, Planning and Policy Response in the Western Asia-Pacific, Edward Elgar Publishing, 60-68, 2020.10.
14. Age-related changes in lower extremity motion during gait and its relationship to lower limbs muscle mass.
15. Wen Liang Yeoh, Ping Yeap Loh, Seiji Saito, Satoshi Muraki, Interaction between a motorized walker and its user: effects of force level on within-stride speed and direction fluctuations, Journal of Ambient Intelligence and Humanized Computing, 10.1007/s12652-020-02343-x, 2020.07.
16. Kawano Takashi, Moriki Goro, Bono Shinya, Kaji Nobuyuki, Yamasaki Masahiro, Muraki Satoshi, Effects of the boccia as an adapted sport on the Mood states and Health-related quality of Life of elderly women in need of nursing care and assistance, Japanese journal of adapted sport science, 18, 1, 43-54, 2020.06.
17. Wen Liang Yeoh, Jeewon Choi, Ping Yeap Loh, Seiji Saito, Satoshi Muraki, The Effect of Horizontal Forces from a Smart Walker on Gait and Perceived Exertion, Assistive technology : the official journal of RESNA, 10.1080/10400435.2020.1744771, 2020.03, Increasingly, electric motors are being incorporated into wheeled walkers to implement various smart features to better assist their users physically. These modified walkers, known as Smart Walkers, use their electric motors to generate horizontal forces that can be used to reduce the physical load for walking, prevent falls and provide navigation support. However, these forces can also alter gait and may inadvertently increase the exertion of the users. This study aims to describe the effects of assistive and resistive horizontal forces (from -18.47 N to 27.70 N) from a Smart Walker on gait and perceived exertion of its users during steady-state walking. Self-selected comfortable walking speed, cadence, stride length, double support phase and ratings of perceived exertion (RPE) were significantly affected and different effects were found for resistive force, relatively low assistive force and high assistive force. With increasing force from -18.47 N to 0 N, RPE decreased and the users walked with lower double support time. From 0 N to 9.23 N, RPE continued to decrease to its lowest point while gait parameters remained constant. Further increasing force up to 27.70 N increased RPE and led to the users to choose to walk at higher speeds. This study demonstrates that users adapt their gait significantly to the forces applied and relatively high constant forces, whether assistive or resistive, will increase perceived exertion. Hence, these need to be carefully considered when developing Smart Walkers in order to provide safe and effective support to its users..
18. Jeewon Choi, Wen Liang Yeoh, Satsuki Matsuura, Ping Yeap Loh, Satoshi Muraki, Effects of mechanical assistance on muscle activity and motor performance during isometric elbow flexion., Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology, 10.1016/j.jelekin.2019.102380, 50, 102380-102380, 2020.02, Mechanical assistance on joint movement is generally beneficial; however, its effects on cooperative performance and muscle activity needs to be further explored. This study examined how motor performance and muscle activity are altered when mechanical assistance is provided during isometric force control of ramp-down and hold phases. Thirteen right-handed participants (age: 24.7 ± 1.8 years) performed trajectory tracking tasks. Participants were asked to maintain the reference magnitude of 47 N (REF) during isometric elbow flexion. The force was released to a step-down magnitude of either 75% REF or 50% REF and maintained, with and without mechanical assistance. The ramp-down durations of force release were set to 0.5, 2.5, or 5.0 s. Throughout the experiment, we measured the following: (1) the force output using load cells to compute force variability and overshoot ratio; (2) peak perturbation on the elbow movement using an accelerometer; (3) the surface electromyography (sEMG) from biceps brachii and triceps brachii muscles; and (4) EMG oscillation from the biceps brachii muscle in the bandwidth of 15-45 Hz. Our results indicated that mechanical assistance, which involved greater peak perturbation, demonstrated lower force variability than non-assistance (p 
19. Josefa Angelie Revilla, Ping Yeap Loh, Satoshi Muraki, Exploratory Study on the Impacts of Handle Vibration on the Hand and Forearm, Industrial Engineering&Management systems,, 18, 4, 591-599 , 2019.12.
20. Wang Yuanyuan,Choi Jeewon,Loh, Ping Yeap,Muraki Satoshi, A comparison of motor control characteristics of the dominant and non-dominant arms in response to assistive force during unilateral task , Isokinetics and Exercise Science, 10.3233/IES-193165, 27, 4, 313-324, 2019.11.
21. Ping Yeap Loh,Keisuke Hayashi,Nursalbiah Nasir,Satoshi Muraki, Changes in Muscle Activity in Response to Assistive Force during Isometric Elbow Flexion, Journal of Motor Behavior , 10.1080/00222895.2019.1670128, 2019.10.
22. Jeewon Choi,Wen Liang Yeoh,Ping Yeap Loh,Satoshi Muraki, Force and electromyography responses during isometric force release of different rates and step-down magnitud, Human Movement Science, 67, 2019.10.
23. Ping Yeap Loh,Wen Liang Yeoh, Satoshi Muraki, An overview of hand postures and aging on morphological changes of the median nerve, Journal of Physiological Anthropology, 10.1186/s40101-019-0201-6, 38, 2019.08.
24. Seiji Saito, Satoshi Muraki, Characteristics of Surface EMG During Gait with and Without Power Assistance, 20th Congress of the International Ergonomics Association, IEA 2018 Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume II Safety and Health, Slips, Trips and Falls, 10.1007/978-3-319-96089-0_80, 739-743, 2019.01, Technology that assists and extends various functions of human beings will soon be available not only to medical and welfare but also to healthy individuals. This study aimed to characterize surface electromyography (EMG) signals in response to walking assistive equipment. Ten healthy male students walked on an 8-m uphill road (5.8% incline) using an assist walker (RT.2, RT.WORKS Co., Ltd) under assist and non-assist conditions. The EMG signals were recorded from four muscles (the rectus femoris [RF], biceps femoris, tibialis anterior, and lateral gastrocnemius). During loading response and terminal stance, the percent maximum voluntary isometric contraction (%MVC) peak value for RF was achieved more quickly in the assist condition than in the non-assist condition. However, during loading response and mid-swing, the %MVC peak value of RF was significantly lower in the assist condition than in the non-assist condition. These results indicate that humans alter muscle exertion patterns in specific muscles to adapt to walking assistance; such a change in the muscle exertion pattern may be adapted for smoother walking..
25. Ping Yeap Loh, Wen Liang Yeoh, Satoshi Muraki, Impacts of typing on different keyboard slopes on the deformation ratio of the median nerve, 20th Congress of the International Ergonomics Association, IEA 2018 Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III Musculoskeletal Disorders, 10.1007/978-3-319-96083-8_33, 250-254, 2019.01, Carpal tunnel syndrome is a symptomatic compression neuropathy of the median nerve as it travels through the wrist. Several factors such as wrist angle and finger posture cause a change of the intra-carpal tunnel pressure. Carpal tunnel syndrome is one of the most commonly reported work-related musculoskeletal disorders. Computer users are at higher risk of upper extremity musculoskeletal symptoms and work-related musculoskeletal disorders, since time spent on the computer is associated with a higher incidence of musculoskeletal disorders. Objective: to investigate the impact of typing at two keyboard slopes (0° and +20°) on the median nerve deformation ratio. Fifteen healthy young men (24.8 ± 2.3 years) were recruited to type using both 0° and +20° inclined keyboards. The participants performed four 30-min blocks of computer typing at 0° and +20° keyboard inclinations. The left wrist median nerve was examined with an ultrasound machine after each 30-min typing block. Two-way repeated analysis of variance was performed to examine any differences in the deformation ratio of the median nerve cross-sectional area. The four time blocks and two keyboard slope conditions (0° and +20° inclination) were used as factors. Continuous typing activity causes a significant increase in the median nerve cross-sectional area deformation ratio (p
26. Shin Takesue, Ping Yeap Loh, Satoshi Muraki, Shinsuke Hamanaka, Atsushi Yamada, Kouichi Ikegami, Kenki Wada, Hiroshi Furutachi, Individual differences in contact pressure on the dorsal surface of the foot during gait, 20th Congress of the International Ergonomics Association, IEA 2018 Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume VII Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design, 10.1007/978-3-319-96071-5_22, 216-219, 2019.01, The main objective of this study was to examine how contact pressure on the dorsal surface of the foot changes with varying shapes. Ten healthy young men (22.1 ± 0.6 years) with independent walking ability were recruited in this study. We measured the anthropometric characteristics of the foot. Shoe size for the experiment was individually decided based on the obtained anthropometric data. Subsequently, FlexiForce® sensors were attached to the dorsal side of the first metatarsophalangeal joint (P1), intermediate cuneiform (P2), and pternion (P3) to measure the contact pressure during walking. In addition, foot switch sensors were used to determine the gait cycle. At P2, some participants with a higher foot height showed a lower increase in contact pressure during the loading response or pre-swing phases than did participants with a lower foot height. The observed distribution of the contact pressure on the dorsal foot might be caused by the change in the shape of the shoes and the foot joint movement during walking..
27. Satoshi Muraki, Keisuke Hayashi, Nursalbiah Nasir, Ping Yeap Loh, Motor control with assistive force during isometric elbow flexion, 20th Congress of the International Ergonomics Association, IEA 2018 Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III Musculoskeletal Disorders, 10.1007/978-3-319-96083-8_24, 191-194, 2019.01, In the modern society, an assistive/powered suit has been developed to enhance the limb and trunk movements by mechanical force. The effective output of assistive products needs cooperation between the users, that is, human beings and the machine. The present study investigated the motor control of external forces that assist with physical exertion. Sixteen adult male participants performed isometric elbow flexion under two conditions of submaximal workload (20% and 40% of the maximal voluntary contraction) and four levels (0%, 33%, 67%, and 100%) of assistive force. The electromyographic (EMG) activity of the agonist and antagonist muscles (biceps and triceps, respectively) and rating of perceived exertion decreased with increased levels of assistive force under both workload conditions. At the lower level of assistance (33%), the EMG amplitude of the biceps was near the expected amplitude, which denotes that the participants made good use of the assistive force. However, at the higher level of assistance (100%), it was far from the expected values at both workload levels. These results suggest that the effectiveness of assistive force changes according to the level of workload and assistive force, and that various human physiological regulations and motor control would be required during cooperative work with assistive force..
28. Jeewon Choi, Ping Yeap Loh, Satoshi Muraki, Simulation study on the effects of adaptive time for assist considering release of isometric force during elbow flexion, 20th Congress of the International Ergonomics Association, IEA 2018 Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume III Musculoskeletal Disorders, 10.1007/978-3-319-96083-8_46, 347-350, 2019.01, The increasing trend of development of assistive technology allows for the use of assistive robots such as power assist devices to be prevalent in various social domains. Such power assist devices usually provide incidental power to their users, requiring human-machine force interaction. If the power assist device requires users to release their muscular force without considering adaptive time, users might be confused to control the level of their manual performance in response to the external force. This study investigated adaptive time with varying release rates of isometric force during one-arm elbow flexion, focusing on muscle activity and force control. Eight participants conducted graphical force-tracking tasks designed to simulate power-assist condition. Electromyography signals and the tension forces of the biceps brachii and triceps brachii were measured. The results implied that sufficient adaptive time for muscular force release induced better performance level with a smaller difference between the target force and the actual force. However, higher subjective exertion was also accompanied during the longer time for muscular force release. This study suggests that in designing power assist devices, the duration for muscular force release and consequent characteristics should be considered to maintain the precise level of force control..
29. Tadashi Uno, Ping Yeap Loh, Satoshi Muraki, The Influence of Information Acquisition Strategies on Foot Proprioception and Obstacle Avoidance Pattern in People with Low Vision, 20th Congress of the International Ergonomics Association, IEA 2018 Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) - Volume II Safety and Health, Slips, Trips and Falls, 10.1007/978-3-319-96089-0_86, 786-790, 2019.01, The purpose of this study was to understand the influence of various information acquisition strategies on foot proprioception and obstacle avoidance in people with low vision. Ten adult males (41.0 ± 7.1 years) with pigmentary retinal degeneration were recruited for this study. Participants acquired obstacle information (obstacle height: 4 cm and 15 cm) through three different strategies, namely, front (A), downward (B), and tactile (C). Subsequently, the participants performed two different tasks; Task 1: After identification of the obstacles, the participants reproduced the obstacle height by lifting their foot while standing still (10 times). Task 2: Following the acquisition of the obstacle information through conditions B and C, participants performed obstacle step-over from a standing position. In task 1, condition B showed significantly higher toe-rise and coefficient of variance in toe-rise (p
30. Satoshi Muraki, Human-Centered Design for Advanced Technology, Advances in Social Science, Education and Humanities Research,, 207, 2018.11.
31. Ping Yeap Loh, Wen Liang Yeoh, Hiroki Nakashima, Satoshi Muraki, Deformation of the median nerve at different finger postures and wrist angles, PeerJ, 10.7717/peerj.5406, 2018, 8, 2018.08, Background. The objective of this study was to evaluate the changes of the median nerve cross-sectional area (MNCSA) and diameters of the median nerve at different finger postures and wrist angles. Methods. Twenty-five healthy male participants were recruited in this study. The median nerve at wrist crease was examined at six finger postures, and repeated with the wrist in 30° flexion, neutral (0°), and 30° extension. The six finger postures are relaxed, straight finger, hook, full fist, tabletop, and straight fist. Results. The main effects of both finger postures and wrist angles are significant (p
32. Ping Yeap Loh, Hiroki Nakashima, SATOSHI MURAKI, Effects of grip force on median nerve deformation at different wrist angles, PEERJ, 10.7717/peerj.2510, 4, 2016.09.
33. Irma Nur Afiah, HIroki Nakashima, Ping Yeap Loh, SATOSHI MURAKI, An exploratory investigation of changes in gait parameters with age in elderly Japanese women, SPRINGERPLUS, 10.1186/s40064-016-2739-7, 5, 2016.07.
34. Jinghong Xiong, SATOSHI MURAKI, Thumb performance of elderly users on smartphone touchscreen, SPRINGERPLUS, 10.1186/s40064-016-2877-y, 5, 2016.07.
35. Jinghong Xiong, SATOSHI MURAKI, Effects of age, thumb length and screen size on thumb movement coverage on smartphone touchscreens, International Journal of Industrial Ergonomics , doi:10.1016/j.ergon.2015.11.004, 53, 140-148, 2016.05, The present study investigated the effects of touch button size on touchscreen operability and compared these effects between young adult and elderly participants. A total of 21 young adults (aged 22.3 ± 1.5 years) and 20 elderly adults (aged 68.1 ± 4.9 years) were recruited and asked to press square number buttons (from 0 to 9) on an experimental touchscreen with their right index finger. The buttons' size changed during the experiment with six conditions (6, 8, 10, 12, 14 and 16 mm). It was found that a decrease of the button size to 10 mm or below tended to increase the operation time and error rate, whereas it decreased the subjective overall operability of the touchscreen. Such effects were greater in the elderly adults than in the young adults. In addition, the reaction positions on the buttons were found to be close to the right side of them, which led the fingertip to approach the right outline of the buttons. These findings suggest that the use of small touch buttons should be minimised on touchscreens, especially for elderly users..
36. Lu'lu' Purwaningrum, Kyotaro Funatsu, Jinghong Xiong, Cucuk Nur Rosyidi, SATOSHI MURAKI, Effect of Furniture Weight on Carrying, Lifting, and Turning of Chairs and Desks among Elementary School Children, PLOS ONE, 10.1371/journal.pone.0128843, 10, 6, 2015.06.
37. Loh Ping Yeap, Hiroski Nakashima, SATOSHI MURAKI, Median nerve behavior at different wrist positions among older males, PEERJ, 10.7717/peerj.928, 3, 2015.04, The effect of wrist flexion-extension on the median nerve appearance, namely the cross-sectional area (MNCSA) and the longitudinal (D1) and vertical (D2) diameters, was investigated among older adults (N = 34). Ultrasound examination was conducted to examine the median nerve at different wrist angles (neutral; and 15°, 30°, and 45° extension and flexion), in both the dominant and nondominant hand. Median nerve behavior were significantly associated with wrist angle changes. The MNCSA at wrist flexion and extension were significantly smaller (P
38. Ping Yeap Loh, SATOSHI MURAKI, Effect of Wrist Angle on Median Nerve Appearance at the Proximal Carpal Tunnel, PLOS ONE, 10.1371/journal.pone.0117930, 10, 2, 2015.02.
39. PING YEAP LOH, SATOSHI MURAKI, Effect of different wrist position on median nerve cross-sectional area at proximal carpal tunnel, 149-154, 2014.11.
40. Cucuk Nur Rosyidi, Susy Susmartini, Lu'lu' Purwaningrum, SATOSHI MURAKI, Mismatch Analysis of Elementary School Desk and Chair Key Characteristics in Indonesia, 660, 1057-1064, 2014.10.
41. PING YEAP LOH, SATOSHI MURAKI, Effect of wrist deviation on median nerve cross-sectional area at proximal carpal tunnel level, 43, 3, 180-185, 2014.10.
42. Jinghong Xiong, KIYOTAKA FUKUMOTO, SATOSHI MURAKI, The effects of touch button size on touchscreen operability. Journal of Mechanics Engineering and Automation, 4, 8, 667-672, 2014.08.
43. Su-Young Son, Ilham Bakri, SATOSHI MURAKI, Yutaka Tochihara, Comparison of firefighters and non-firefighters and the test methods used regarding the effects of personal protective equipment on individual mobility, 45, 4, 1019-1027, 2014.07.
44. Jinghong Xiong, SATOSHI MURAKI, An ergonomics study of thumb movements on smartphone touch screen, 2014.05.
45. Masahiro Horiuchi, SATOSHI MURAKI, Yukari Horiuchi, Naofumi Inada, Daijiro Abe, Energy cost of pushing a wheelchair on various gradients in young men, , 44, 3, 442-447, 2014.05.
46. NOTO HIROKO, SATOSHI MURAKI, Effect of rear-wheel operation of a manual wheelchair on user's riding comfort and helper's strain while navigating steps, 19, 1, 17-22, 2014.05.
47. SATOSHI MURAKI, Seiji Saito, Mitsuru Okura, Physical strain and risk during stroller locomotion on cross and combined slopes, 10, 43-45, 2013.12.
48. SATOSHI MURAKI, Kiyotaka Fukumoto, Osamu Fukuda, Prediction of the muscle strength by the muscle thickness and hardness using ultrasound muscle hardness meter, 2, 457, 2013.09.
49. Hiroko Noto, SATOSHI MURAKI, Rear-wheels operation indexes for manual wheelchair helpers navigating step, 189-192, 2013.05.
50. Influence of slope gradients and wheelchair pushing techique on the user's postural change and physiological responses.
51. Effectiveness of the applying the wheelchair pushing techiques while starting and stopping with the step.
52. The effects of stairs dimensions on movements during climbing up and down stairs.
53. Steps and helper's wheelchair pushing tecniques for passing steps that consider both the user's riding comfort and the helper's physical strain.
54. Muraki S, Okabe K, Abe T, Sai A , The preferable keypad layout for ease of pressing small cell phone keys with the thumb, Journal of Human Ergology, 39, 2, 133-142, 2010.12.
55. Inoue M, Fukuda O, Tsubai M, Muraki S, Okumura H, Arai K, Automated discrimination method for measuring the thickness of muscular and subcutaneous fat layers based on tissue elasticity, Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE , 5175-5178, 2009.09.
56. Fukumoto K, Muraki S, Tsubai M, Fukuda O., Calibration of cross-sectional images measured by an ultrasound-based muscle evaluation system, Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE, 428-431, 2009.09, [URL].
57. Mika Kuroiwa, Satoshi Muraki, Kiyotaka Fukumoto, Masayoshi Tsubai, Osamu Fukuda, The relationship between muscle hardness in the trapezius and subjective symptoms of shoulder discomfort in Japanese adults, Proceeding of 17th World Congress on Ergonomics (CD-ROM), 5 pages, 2009.08.
58. Tomoaki Mori, Satoshi Muraki, Kazunobu Oyama, Syohei Sakadume, The effects of barrier-free housing on the physical fitness and incidence of falls among healthy middle-aged and elderly people, Proceeding of 17th World Congress on Ergonomics (CD-ROM), 4 pages, 2009.08.
59. Muraki S,Tsunawake, Relationship between pedaling rate and physiological responses during passive leg cycling.  , Isokinetics and Exercise Science, 2008.06.
60. Abe D, Muraki S, Yasukochi, Ergonomic effects of load carriage on the upper and lower back on metabolic energy cost of walking. , Applied Ergonomics , 39(3): 392-398 , 2008.05.
61. Abe D, Muraki S, Yasukochi, Ergonomic effects of load carriage on energy cost of gradient walking. , Applied Ergonomics , 39(2): 144-149 , 2008.03.
62. Abe D, Muraki S, Yanagawa K, Fukuoka Y, Niihata S, Changes in EMG characteristics and metabolic energy cost during 90-min prolonged running. , Gait and Posture, 26(4) 607-610 , 2007.10.
63. Saito S, Muraki S, Tochihara Y, Effects of worn-out soles on lower limb stability, shock absorption and energy cost during prolonged walking. , Journal of Physiological Anthropology, 26(5):521-526 , 2007.09.
64. Muraki S, Fornusek C, Raymond J, Davis GM, Muscle oxygenation during prolonged electrical stimulation-evoked cycling in paraplegics. , Applied Physiology, Nutrition, and Metabolism, 32(3):463-472 , 2007.06.
65. Abe D, Muraki S, Yanagawa K, Fukuoka Y, Niihata S., Changes in EMG characteristics and metabolic energy cost during 90-min prolonged running, Gait and Posture , 25 (5):, 2007.05.
66. Muraki S, Saito S, Mihoshi A, Physiological Approach to a Desirable Gradient of Longitudinal Slope for All Users., The Proceeding of the 2nd International Conference for Universal Design in Kyoto 2006,, 2006.10.
67. Abe D, Tokumaru H, Niihata S, Muraki S, Fukuoka Y, Usui S, Yoshida T, Assessment of short-distance breaststroke swimming performance with critical velocity., Journal of Sports Science & Medicine , 5 (2): 340-348, 2006.06.
68. Muraki S, Tsunawake N, Yamasaki M, Difference in cardiac autonomic control between steady-state arm cranking and leg cycling in women., Advances in Exercise and Sports Physiology, 10: 93-100, 2004.12.
69. Muraki S, Tsunawake N, Yamasaki M, Limitation of muscle deoxygenation in the triceps during incremental arm cranking in women, European Journal of Applied Physiology, 10.1007/s00421-003-0962-8, 91, 2-3, 246-252, 91:246-252, 2004.04.
70. Muraki S , Tsunawake N, Yamasaki M, Limitation of muscle deoxygenation in the triceps during
   incremental arm cranking in women., European Journal of Applied Physiology, 10.1007/s00421-003-0962-8, 91, 2-3, 246-252, 2003.01.
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