David Michael O'Sullivan

David Michael O'Sullivan
Pusan National University | PNU · Division of Sports Science

PhD

About

42
Publications
15,395
Reads
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482
Citations
Introduction
The majority of my research can is to quantify and evaluate the quality of human movement for the treatments of any movement/. behavioral disorders,. An additional aim is to help create a safer environment for Taekwondo and ParaTaekwondo athletes alike by using both epidemiology and biomechanical studies to understand injury risks and suggest prevention measures.
Additional affiliations
September 2014 - present
Pusan National University
Position
  • Professor (Associate)
January 2009 - December 2009
Seoul National University
Position
  • Laboratory Manager

Publications

Publications (42)
Article
Full-text available
Para taekwondo is a combat sport martial art that requires fast reaction times for successful defense during fighting. The current classification system is based on the function and the effective length of the upper limbs, which affects the athlete’s ability to block. Therefore, this study aimed to investigate the differences between the different...
Preprint
BACKGROUND Depression is a severe illness that has accelerated with the spread of COVID-19 and associated lockdowns. As a result, reported physical activity has substantially decreased, further increasing depressive symptoms. OBJECTIVE We aimed to explain the use of gamification principles to develop content for an interactive physical activity ga...
Article
The objectives of this study were to investigate the feasibility of applying computer vision techniques and to analyse changes in behaviour and movement of high school students during class. The study is performed over two phases. Phase one focuses on developing a feasible method to use computer vision-based techniques in high school classes and ph...
Article
BACKGROUND Current research on genu varum shows the favorable influence of exercise on the biomechanics of the knee joint by reducing the static malalignment and mechanical imbalances, however the transference to a more optimum gait has not been investigated.OBJECTIVES To investigate the effects of Pilates exercise on the changes of gait and lower...
Article
Background: Para Taekwondo has only recently been added to the Paralympic games scheduled to be held in 2021; however, there is limited research on the classification of the Para Taekwondo athletes. This study aimed to provide details on the impairments and disabilities of the Para Taekwondo players. The secondary objective was to investigate the...
Article
Full-text available
Context: There is a shortage of Taekwondo epidemiology studies since the rule changes introduced by World Taekwondo in 2017. Objective: To describe injury and illness patterns at the Muju 2017 World Taekwondo Championships (WTC) following the implementation of the web-based surveillance system by World Taekwondo. Design: Prospective cohort stu...
Article
Full-text available
Taekwondo has been reported to be one of the most injurious sports in the summer Olympics, however, there is a dearth of data about injury profiles for junior athletes. Therefore, we aimed to identify the incidence and profiles of the injuries and illnesses that occurred during the 2018 World Taekwondo Junior Championships and recorded using an onl...
Article
Objective: This study aims to compare and analyze the difference of impact force attenuation according to size and impact location on a Taekwondo body protector. Methods: Body protectors sized 1 to 5, were impact tested by equipment based on the specifications in the European standard manual (EN 13277-1, 3). The impactor release heights were set...
Article
Concern about the consequences of head impacts in US football has motivated researchers to investigate and develop instrumentation to measure the severity of these impacts. However, the severity of head impacts in unhelmeted sports is largely unknown as miniaturised sensor technology has only recently made it possible to measure these impacts in vi...
Chapter
The purpose of this study is to develop serious game content that can test cognitive ability by using digital media such as smartphones and a beam projection. The main idea of the serious game is that the physical movements of the elderly control the game. The different scenarios of the game promote the physical activity of the elderly while at the...
Chapter
We present non-intrusive visual observation and estimation of movement parameters using RGB data for detecting the effect of olfactory stimulation (essential oils) on movement patterns of high school students during the lessons. In particular, we examine the effect of exposure to aromatherapy has on students’ movement kinetics of upper-body: veloci...
Article
Full-text available
The objective of the study was to evaluate and compare different brands of forearm, shin, hand and foot protective equipment used in Taekwondo. The most popular brands of large forearm, shin, hand and foot protectors (D®, A®, K ®), approved by the World Taekwondo and Korean Taekwondo Association, were examined. A drop test was used to test the prot...
Article
Full-text available
The requirement to measure the number and severity of head impacts in sports has led to the development of many wearable sensors. The objective of this study was to determine the reliability and accuracy of a wearable head impact sensor: xPatch, X2Biosystems, Inc. The skin-mounted sensor, xPatch, was fixed onto a Hybrid III headform and dropped usi...
Chapter
In this paper we present a pilot study on non-intrusive visual observation and estimation of affective parameter using recorded videos (RGB). We aim at estimating student engagement analyzing upper-body movement comparing two different classroom settings: with the introduction of aromatherapy during the class vs standard lesson. Following previous...
Article
Background: Geriatric depression is common due to the high rate of chronic diseases suffered by the older population. There is a well-established effect of exercise on one's wellbeing, however, for the elderly females there is dearth in research addressing exercise and its effect on their neurotransmitters and depression score. Therefore, this stu...
Article
Full-text available
OBJECTIVES The objective of this study to examine the reliability and repeatability of the headband sensor in comparison with the gold standard 3 linear and 3 angular rate sensors placed at the center of gravity of the Hybrid III dummy head during drop tests. METHODS A SIM-G headband sensor was attached to a Hybrid III dummy head and neck which was...
Article
The purpose was to compare rotational and linear head accelerations as a result of taekwondo kicks and punches. Taekwondo athletes executed five repetitions of the turning kick, spinning hook kick, hook punch, straight punch, and jab punch to a Hybrid III Crash Test Dummy head-neck complex. A tri-axial accelerometer and an angular rate sensor were...
Article
The reported incidence of head and neck injuries in hurling is 0.12 per 1000 hours, but no previous research has quantified head impact characteristics in this sport. Here, a wireless accelerometer and gyroscope captured head impacts, in 20 senior club level hurling players. Peak linear and rotational acceleration and impact location were recorded...
Conference Paper
The purpose of this study is to recognize the limitations of the self-report text based Emotional and Behavioral Disorder (EBD) questionnaire and to develop the interactive behavioral screening program through ICT. For this purpose, seven representative items of the Adolescent Mental Health and Problem Behavior Screening Questionnaire-II (AMPQ-II)...
Conference Paper
The aims of this study is to extract a standard movement code according to specific emotional behavior patterns in the human behavior information database and to develop educational applications composed of corresponding opposite behavior codes. Among the various behaviors of the human being, we focused on the behavior of the emotional behavioral d...
Article
OBJECTIVE The purpose of this study was to monitor head impact magnitude and characteristics, such as impact location and frequency, at high school taekwondo sparring sessions. METHODS Eight male high school taekwondo athletes participated in this study. The head impact characteristics were recorded by X-Patch, a wireless accelerometer and gyrosco...
Article
Full-text available
[Purpose] This study compared the effects of pilates and an exercise program on the craniovertebral angle, cervical range of motion, pain, and muscle fatigue in subjects with a forward head posture (FHP). [Subjects and Methods] A total of 28 sedentary females (age 20 to 39 years) with FHP were randomly assigned to pilates (n=14) and combined (n=14)...
Article
Full-text available
The purpose of this study was to identify the effect of systematic mental skills training (MST) for a taekwondo gold medallist. Based on MST of other sports, this programme was designed for a single subject who competed in the Olympics. The Korean test of performance strategies, Sport Attributional Style in Korean Athletes, and a few sessions of in...
Article
This study aimed to compare the impact attenuation performance of boxing and taekwondo headgear in terms of peak linear and rotational acceleration. To measure the impact attenuation of headgear, a standardized (American Society for Testing and Materials (ASTM) F-2397) martial arts headgear striker was used to impart impacts to a 50th Percentile Ma...
Article
Full-text available
[Purpose] The purpose of this study was to investigate the gait pattern of children with autism by using a gait analysis system. [Subjects] Thirty children were selected for this study: 15 with autism (age, 11.2 ± 2.8 years; weight, 48.1 ± 14.1 kg; height, 1.51 ± 0.11 m) and 15 healthy age-matched controls (age, 11.0 ± 2.9 years; weight, 43.6 ± 10...
Article
Full-text available
A Abstract. Objective: To assess taekwondo sparring performance variables, such as joint ranges of motion, reaction times, and kicking foot speeds, to serve as a framework for developing sport-specific classification in Para-taekwondo competition. Methods: After a standard taekwondo warm up, athletes executed five popular scoring techniques, back k...
Article
Full-text available
Objective: The purpose of this study was to compare the effects of various taekwondo kicks and age (school level) in absolute terms and relative body mass on the resultant linear acceleration (RLA) of an instrumented head form. Methods: Forty-eight male (middle school: 16; high school: 16; university: 16) taekwondo athletes were recruited for this...
Article
To date, only one study reported the impact attenuation of protective taekwondo headgear. Although Olympic boxing has discontinued the use of headgear, similarities in designs are thought to provide a framework for improvements of taekwondo headgear. To determine differences in impact attenuation of taekwondo and boxing headgear. Between groups. Im...
Article
Only one study reported the impact attenuation of taekwondo headgear. Although Olympic boxing has discontinued the use of head protectors, similarities in designs are suggested to provide a framework for improving taekwondo helmets as a previous report determined poor testing results. To assess attenuation of taekwondo and boxing headgear. Between-...
Article
A recent regulation in boxing, of removing headgear, proposes the question as to whether a similar rule should be adopted in taekwondo. To assess the effect of protective taekwondo footpads on attenuating impacts of an instrumented head-form. It is hypothesised that footpads with greater thickness would mitigate impacts better than thinner ones. Be...
Article
Full-text available
The purpose was to examine differences between taekwondo kicks and boxing punches in resultant linear head acceleration (RLA), head injury criterion (HIC15), peak head velocity, and peak foot and fist velocities. Data from two existing publications on boxing punches and taekwondo kicks were compared. For taekwondo head impacts a Hybrid II Crash Dum...
Article
Full-text available
The purpose of this study was to investigate the differences in muscle activation patterns of the biceps brachii (BB) and flexor carpi radialis (FCR) muscles, while measuring the resultant force (RF) at different shoulder flexion angles. [Subjects] Thirteen healthy males (age 24.85±3.4 years, weight; 77.8±7.9 kg; height, 1.7±0.05 m) were enrolled i...
Article
Full-text available
[Purpose] The purpose of the present study was to examine the effects of an aqua aerobic therapy exercise for older adults on biomechanical and physiological factors affecting gait. [Subjects] A total of 15 subjects participated in this study and they were randomly divided into the experimental and the control group. [Methods] Physiological variabl...
Article
Full-text available
The axe kick, in Olympic style taekwondo, has been identified as the most popular scoring technique aimed to the head during full contact competition. The first purpose of this study was to identify and investigate design issues with the current World Taekwondo Federation approved chest protector. A secondary purpose was to develop a novel chest pr...
Article
Background With over 20 years of taekwondo concussion research highlighting the high incidence of injury, previous studies recommend an investigation of headgear impact attenuation performance. Objective To examine impact attenuation differences between the anterior, posterior and sides of selected taekwondo headgear brands. Design Between-groups....
Article
Background: In taekwondo (TKD), the incidence of concussion is four times greater than in American gridiron football. Biomechanical studies of concussion in taekwondo are scarce. Research question: To assess the effect of head impact biomechanics as a result of taekwondo kicks. Type of study: Between-groups design. Methods: Two male (22.0±0.0 years...
Article
Objective: The objective of this study was to assess the effect of taekwondo kicks and peak foot velocity (FVEL) on resultant head linear acceleration (RLA), head injury criterion (HIC15) and head velocity (HVEL). Methods: Each subject (n=12) randomly performed five repetitions of the turning kick (TK), clench axe kick (CA), front leg axe kick,...
Article
Full-text available
To review competition injuries in taekwondo and use this information to develop recommendations to reduce the number and severity of injuries in taekwondo competition. The available literature was searched for prospective studies on taekwondo injuries in adult athletes. An injury was defined as any circumstance for which the athlete sought the assi...
Article
Full-text available
The primary purpose of this research was to compare the impact characteristics of Taekwondo (TKD) and Yongmudo (YMD) player's turning kick according to the target height. 5 highly skilled YMD and 5 TKD players participated in this study. To measure the impact force, two accelerometers were fixed to a PVC pipe in a sandbag. Each participant performe...

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Project (1)
Project
1) Discuss the development of an analysis system focusing on behavior through human movements, such as gestures and other non-verbal communication actions 2) Discuss the development of a Laban Movement Analysis (LMA) based code for recognizing and recording human movement for basic movement research 3) Explore the possible applications of using a human movement recognition platform with ICT for controlling and interacting with digital systems and advanced cutting edge technologies.