Philipp Kornfeind

• Ing. DI(FH)
• University of Vienna

The use of small, interconnected and intelligent tools within the broad framework of pervasive computing for analysis and assessments in sport and physical activity is not a trend in itself but defines a way for information to be handled, processed and utilised: everywhere, at any time. The demand for objective data to support decision making promp...

A systematic literature search was conducted to review the force-enhancing mechanisms caused by a stretch-shortening cycle (SSC). The review aims to yield an overview of the contraction modalities influencing the SSC performance in animals and single joint movements in humans. The search was executed in common with the PRISMA statement. CINAHL, MED...

In human motion analysis, inverse dynamic solutions are used for the determination of joint reaction forces and net joint torques. This approach requires a full kinematic description, external forces and, most important, accurate anthropometric measures. For the estimation of human body segment parameter values, several methods have been proposed i...

Parameter values characterizing the motion of the cue during impact in pool billiards have been determined for selected shots. 20 elite players performed 18 predefined tasks comprising follow, draw, stop shots and breaks. 3D-kinematics were obtained using a motion analysis system comprising 8 cameras operating at 250 Hz and a high speed camera capt...

A method for quantifying unbalance characteristics of table tennis balls has been developed. The method has been validated and tested threefold: 1. Subjective ranking of balls by professional players, 2. high speed video recordings of spinning balls, motion reconstruction, and ranking according to the oscillation amplitudes observed and 3. investig...

This study investigates the accuracy of the tracking system LPM (Local Position Measurement). The goal was to determine detailed error values of the system in the context of sports performance analyses. Six moderately trained male soccer players (amateur level) performed 276 runs on three different courses at six different speeds. Additionally, ten...

Ubiquitous methods and technologies are well-established in modern society. Pervasive computing techniques are also widely used in the field of sport. This article gives an overview of some typical implementations and fields of application regarding the use of pervasive computing in sports competition and training. Moreover, it presents our current...

The continuous advances of wireless (sensor) and mobile technologies enable new opportunities in the development of sports applications. Sensor devices are getting smaller, increasingly cable-free and smarter, enabling efficient methods for the acquisition of performance data. The diversity, powerfulness, networking ability and handy design of toda...

A prototype system for monitoring, transmitting and processing performance data in sports for the purpose of providing feedback has been developed. During training, athletes are equipped with a mobile device and wireless sensors using the ANT protocol in order to acquire biomechanical, physiological and other sports specific parameters. The measure...

The aim of this study was to analyze the stability of the aiming process of elite biathlon athletes. Nine elite athletes performed four series of five shots onto the same target and onto targets next to each other in a shooting hall. A video-based system reconstructed the horizontal and vertical motion of the muzzle. The time period starting after...

The Mobile Motion Advisor (MMA) is a mobile feedback system designed to support high school students by giving them instructions during their physical exercises based on the integration of up-to-date sensor, data transmission and processing technologies to provide optimal training assistance. The aim is to give individually customized exercise inst...

The emergence and the continuous improvement of mobile devices and sensor technologies have awakened interest in the application of such hardware for various professional and amateur sports. Mobile coaching, for instance, is an upcoming approach focusing on the use of present-day handheld PCs, innovative sensors and intelligent feedback methods for...

Ubiquitous (pervasive) computing is a term for a synergetic use of sensing, communication and computing. Pervasive use of computing has seen a rapid increase in the current decade. This development has propagated in applied sport science and everyday life. The work presents a survey of recent developments in sport and leisure with emphasis on techn...

A measuring station for assessing the coordination in double rowing on land has been developed. Two rowing ergometers are put on slides allowing to imitate the on-water team situation. Pulling forces are measured for both ergometers simultaneously. One ergometer is equipped with a device for measuring reaction forces at the foot stretcher. A set of...

In rifle shooting disciplines coaches and athletes are interested in the motion of the rifle just before and immediately after shooting. Normally, commercial laser systems (e.g. Noptel, Finland) are used to measure and store the hit point of the shot and the on-target trajectory of the alignment of the weapon. A major drawback of this method lies i...

Advances in information technology have let computer scientists and engineers develop sports-specific feedback systems in cooperation with biomechanists, physiologists, sport psychologists, and strength and conditioning specialists. These feedback systems incorporate embedded sensors and devices into the sport equipment or use sensors attached to t...

On-land feedback devices using rowing ergometers provide an alternative for on-water systems. In order not to draw incorrect conclusions it is essential to compare the rowers’ technique in the boat to that on the ergometer. Units for measuring reaction forces in the boat and at the ergometer have been constructed. Similarities in the reaction force...