Hirofumi Ida

Hirofumi Ida
Jobu University · Department of Sports and Health Management

Ph.D.

About

59
Publications
6,204
Reads
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488
Citations
Citations since 2016
13 Research Items
257 Citations
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
Additional affiliations
April 2014 - present
Jobu University
Position
  • Associate Professor, Jobu
Description
  • Regular
April 2013 - present
Shibaura Institute of Technology
Position
  • Part-Time Lecturer, SIT
October 2012 - March 2014
Jobu University
Position
  • Lecturer, Jobu

Publications

Publications (59)
Article
Full-text available
There remains a question about whether and to what extent perception–action coupled response in virtual reality are equal/unequal to those in the real world or physical reality. The purpose of this study was to identify the differences in the environmental effect of virtual presentation on the motor responses of a one-handed ball catching. Thirteen...
Article
Background Voluntary movement such as lifting a foot in preparation to stepping acts as a self-initiated perturbation that disturbs postural equilibrium. To maintain and restore equilibrium, humans utilize early, anticipatory, and compensatory postural adjustments. Despite technological progress in accessible virtual reality (VR) devices, little is...
Article
Full-text available
Slow-motion footage of sports actions is widely used as a visual learning tool in observing the dynamic motor behaviors of athletes. Recent studies on action observation have reported that extending the observation time in slow-motion footage provides benefits of understanding the intention of an opponent’s action, at least when observing rapid mov...
Article
This study was aimed at determining how the visual information of an end-effector (racket) and the intermediate extremity (arm) of a tennis server contribute to the receiver's anticipatory judgement of ball direction. In all, 15 experienced tennis players and 15 novice counterparts viewed a spatially occluded computer graphics animation of a tennis...
Article
Full-text available
Objective: Recent studies have reported that skilled tennis players are likely to use proximal body information for anticipating the direction of their opponent's forehand shot. However, in these studies, the visual stimuli did not include visual information about the ball. Skilled players may have used proximal information owing to the lack of di...
Data
An example of four types of CG images. (WMV)
Data
The mean and standard deviation of accuracy scores (skilled and novice players) for each of four temporal occlusion conditions. (TIF)
Data
All data used in statistical analysis in Fig 3. (CSV)
Data
The mean and standard deviation of accuracy scores for each of four temporal occlusion conditions. (TIF)
Data
The mean and standard deviation of accuracy scores (skilled and novice players) for each of four CG models. (TIF)
Article
Full-text available
The purpose of this study is to investigate the control of vertical posture during obstacle avoidance in a real versus a virtual reality (VR) environment. Ten healthy participants stood upright and lifted one leg to avoid colliding with a real obstacle sliding on the floor toward a participant and with its virtual image. Virtual obstacles were deli...
Article
Background Anterior cruciate ligament and hamstring strain injuries occur during unanticipated cutting and stopping movements. Previous prospective studies showed that athletes with decreased trunk neuromuscular control are at increased risk of knee injury. Therefore, deficits in trunk neuromuscular control during unanticipated movements may result...
Article
The purpose of this paper is to clarify gender specific differences in strategies adopted by athletes during a cutting maneuver, based on results of recent research. The experimental task selected for detection of the risk of an injury to the anterior cruciate ligament (ACL) during a cutting maneuver should also involve trunk control. An example of...
Chapter
Our world never seems to stop computerization. Thus, we must work effectively with computer displays in our daily lives. This is often the case for experimental participants who are instructed to respond to computer-generated visual stimuli. This chapter reviews the literature on human visuomotor behaviors, for which computer-simulated displays, su...
Article
Full-text available
The aim of this study was to clarify the quantitative relationship between tennis server's motion and receiver's anticipation with a multiple regression analysis by using the racket's kinematic parameters as explanatory variables and anticipatory judgment of ball direction as a dependent variable. Twelve expert tennis players and 12 novice players...
Article
Full-text available
The anterior cruciate ligament (ACL) plays an important role in controlling knee joint stability, not only by limiting tibial anterior translation but also by controlling knee axial rotation. The aim of ACL reconstruction is to reduce excessive anterior joint laxity, hoping to restore normal tibiofemoral kinematics including knee axial rotation. Th...
Article
In one-handed catching behavior, binocular visual information such as retinal disparity and vergence, as well as monocular depth cues, can be used to control the motor effector’s motion. Typical virtual devices that are equipped with a stereoscopic display provide binocular depth cues by presenting two offset images to each eye, and are increasingl...
Article
The purpose of this study was to determine whether and how the perceptual response of athletes differed depending on their sporting expertise. This was achieved by comparing the responses of tennis and soft tennis players. Twelve experienced tennis players and 12 experienced soft tennis players viewed computer graphic serve motions simulated by a m...
Article
Objective: The objective is to assess the in vivo knee secondary motions intrinsic to flexion in isolation from actual displacements during a landing activity. For this purpose a "static zero position", which denotes the normal tibiofemoral position to the static flexion angle, was introduced to describe the intrinsic secondary motion. Methods:...
Article
Full-text available
Objective. There are no reports comparing the protocols provided by rigid marker set (RMS) and point cluster technique (PCT), which are similar in terms of estimating anatomical landmarks based on markers attached to a segment. The purpose of this study was to clarify the correlation of the two different protocols, which are protocols for knee moti...
Article
Full-text available
The objective of this study was to assess the cognitive effect of human character models on the observer's ability to extract relevant information from computer graphics animation of tennis serve motions. Three digital human models (polygon, shadow, and stick-figure) were used to display the computationally simulated serve motions, which were pertu...
Data
Test CG animation of stick-figure model. (MOV)
Data
Test CG animation of polygon model. (MOV)
Data
Test CG animation of shadow model. (MOV)
Article
Purpose: To review past attempts, current innovations, and future goals of robotic eye surgery. Methods: A Medline literature search using the words “robot” and “ophthalmology” was performed to identify all relevant literature. Pertinent articles were reviewed and content summarized based on context. Results: Purported potential benefits of robotic...
Article
Full-text available
Female athletes are considered to exhibit knee and trunk motion that is characteristic of anterior cruciate ligament (ACL) injury. The aim of this study was to examine the in vivo motion of the trunk and knee during a cutting manoeuvre and determine the relationship between them. All participants (10 male and 10 female college athletes) performed a...
Article
Full-text available
The purpose of this study was to determine the quantitative relationships between the server's motion and the receiver's anticipation using a computer graphic animation of tennis serves. The test motions were determined by capturing the motion of a model player and estimating the computational perturbations caused by modulating the rotation of the...
Article
Full-text available
Some research studies have investigated the effects of anterior cruciate ligament (ACL) injury prevention programs on knee kinematics during landing tasks; however the results were different among the studies. Even though tibial rotation is usually observed at the time of ACL injury, the effects of training programs for knee kinematics in the horiz...
Article
The differences between the assessments performed with and without the point cluster technique (PCT) for knee joint motions during the high-risk movements associated with non-contact anterior cruciate ligament (ACL) injuries have not been reported. This study aims to examine the differences between PCT and non-PCT assessments for knee joint angles...
Article
Full-text available
Computer graphics of digital human models can be used to display human motions as visual stimuli. This study presents our technique for manipulating human motion with a forward kinematics calculation without violating anatomical constraints. A motion modulation of the upper extremity was conducted by proportionally modulating the anatomical joint a...
Article
The purpose of this study was to compare the tibial rotational stability of anatomical double-bundle anterior cruciate ligament reconstructed knees with single-bundle anterior cruciate ligament reconstructed knees during a high-demand activity. Total of 66 subjects, (22 with double-bundle anterior cruciate ligament reconstruction, 22 with single-bu...
Article
本研究は,バトントワリング日本代表選手6名(男3,女3)を被験者として,キャッチング課題遂行中に計測した眼球運動データに基づき,バトンのキャッチングにおける視線行動を明らかにすることを目的とした.被験者は前方から矢状面内で回転をともなって投げられたバトンをキャッチする課題と,統制条件としてボールのキャッチング課題(5 m,7 m)を行った.眼球運動は,頭部に装着したアイマークカメラ(右眼)を用いて計測した.視線解析の結果から,バトンのキャッチング課題では,視線をリリースからおよそ100 ms後にバトンに移動させ,バトンの下側と中心エリアを走査した後,中心エリアを追視する追跡眼球運動がみられた.これはバトンのキャッチングにおける,ボールとは異なる特徴的な視線行動である.これによって必要な視覚情...
Article
The Cave Automatic Virtual Environment (CAVE), which is a computer-simulated 3D virtual reality (VR) system, is expected to provide sport learners with interactive and immersive learning materials. The purpose of this study was to reveal perceptual characteristics of tennis players when they viewed the tennis ball flight reconstructed in CAVE. The...
Article
The purpose of this study was to reveal the relationship between stooped angles of upper body segments and lower joint moments during sit-to-stand movement. We evaluated joint moments by using the support moment which was advocated by Winter. There was the relationship between the stooped angle of trunk and lower joint moments. When support moment...
Article
Tibial rotation during foot pronation has been proposed as a key factor in running related injuries. Precise analysis of knee motion during running, including the analysis of motion in the coronal plane, is difficult, and the effect of the wearing shoes on tibial rotation during running is unknown. Therefore, we aimed to determine the effect of wea...
Article
This study was designed to compare biomechanical characteristics of the knee joint for several athletic tasks to elucidate their effects and to examine what tasks pose a risk for ACL injury. Three athletic tasks were performed by 24 female athletes: single-limb landing, plant and cutting, and both-limb jump landing. Angular displacements of flexion...
Article
Full-text available
This study aimed to explore the feasibility of using computer graphics (CG) animations to evaluate perceptual skills in tennis. In Experiment 1, we used video images or CG animations to examine the visual search behaviors and the accuracy of anticipating serve direction of 18 skilled tennis players. Participants viewed the racket area for a longer...
Article
This study examined the perceptual effect of color and /or figuration information in human models created using computer graphics (CG) on anticipatory judgments of tennis serves. Fourteen skilled and fourteen novice tennis players attempted to anticipate serve direction by observing one live-action image and four CG animations (polygon, shadow, sti...
Article
Landing with the knee in a valgus position is recognized as a risk factor for anterior cruciate ligament (ACL) injury. Using linear and non-linear regression analyses, the purpose of this study was to examine the correlation between two-dimensional (2D) knee valgus and three-dimensional (3D) knee kinematics measured during a jump landing task. Twen...
Article
The likelihood of sustaining an ACL injury in a noncontact situation is two to eight times greater for females than for males. However, the mechanism and risk factors of ACL injury are still unknown. We compared knee kinematics as well as electromyographic activity during landing between male and female athletes. Eighteen male athletes and nineteen...
Article
The purposes of this study were to investigate the relationship between the relative tibiofemoral movement estimated with the point cluster technique and kinetics of the knee joint during normal walking, and to investigate relationships between the walking speed and the relative tibiofemoral movement or kinetics of the knee joint during prescript w...
Article
The purposes of this study were to (a) describe the racket-arm kinematics and kinetics of the soft-tennis smash during match rallies, and (b) assess the characteristics of this smash vs. the laboratory-simulated smash of our previous study. In the current study we recorded soft-tennis smash motions during match play of the 3rd East Asian Games. Rac...
Article
It is expected to make use of computer graphics (CG) technology for the studies on anticipation skills in sports. The purpose of this study was to clarify the differences in the characteristics of the anticipation skills when presenting the tennis serve motion with CG animations by comparing with VTR movie. On the bases of the coordinate data of th...
Article
Tennis players need to learn perceptual skills in watching the hitting motion executed by opponent. In skilled perception, visual information of skinning (i.e. body shape and color shading) should have strong effect. This study was aimed to investigate the perceptual effect of the visual information with skinning in tennis serve. Fourteen collegiat...
Article
*Image techniques such as motion capture or computer graphics (CG) animation are rapidly progressing and, even in sports science and engineering, these techniques will be helpful as presentation source of perceptual training. This study was aimed to find out kinematic variable (s) as perceptual cue in tennis serve by presenting the CG animation of...
Article
This study tried to construct a exhibiting system of tennis motions of the computer graphics (CG) animation based on the actual three dimensional coordinate data. For the making of the system, we computed three-dimensional locations of body points of tennis serve by using the direct liner transformation (DLT) procedure. In the assessment of this sy...
Article
RESULTS & DISCUSSION: The results of biomechanical parameters showed that the frequency of the baton's spin was 2.0 Hz and the maximum height of baton's flight trajectory was 1.35 m. The results of the questionnaire showed that, in the sense of stereoscopic effect, dynamics and the reality of the stimulus, the all mean scores (79.3 ± 14.4, 74.3 ± 3...
Article
The purpose of this study was to clarify the mechanics involved in making two different shots, namely, cross (C) and down-the-line (D), under a two-choice reaction condition in soft-tennis. Using the images from two high-speed cameras, forehand drive motions under these conditions were analyzed with the direct linear transformation procedure. The a...

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