Mario Heller

• Fachhochschule Sankt Pölten

Background: Due to growing pressure on the health care system, a shift in rehabilitation to home settings is essential. However, efficient support for home-based rehabilitation is lacking. The COVID-19 pandemic has further exacerbated these challenges and has affected individuals and health care professionals during rehabilitation. Digital rehabili...

In this paper, we describe a proof-of-concept for the implementation of a wearable auditory biofeedback system based on a sensor-instrumented insole. Such a system aims to assist everyday users with static and dynamic exercises for gait rehabilitation interventions by providing auditory feedback based on plantar pressure distribution and automated...

BACKGROUND Due to population growth, aging, and the increasing number of people with chronic diseases and disabilities, the need for rehabilitation is steadily increasing worldwide and though the pressure on the health care system is rising. Therefore, a shift in rehabilitation to the home setting is essential. For effective home-based rehabilitati...

Background: Due to growing pressure on the healthcare system, a shift in rehabilitation to the home setting is essential. However, efficient support in home-based rehabilitation is still lacking. The COVID-19 pandemic has further exacerbated these challenges, and affected individuals and healthcare professionals during rehabilitation. Digital reha...

Aktive Mobilität bezeichnet das Zurücklegen von Strecken durch eigene Muskelkraft, beispielsweise durch Rad-Pendeln zur Arbeitsstätte. Die positiven Gesundheitseffekte regelmäßiger Bewegung sind vielfach belegt, deren Förderung national verankert. Schon 600 MET-Minuten körperlicher Aktivität pro Woche reduzieren das Erkrankungsrisiko für ausgewählt...

Aktive Mobilität bezeichnet das Zurücklegen von Strecken durch eigene Muskelkraft, beispielsweise durch Rad-Pendeln zur Arbeitsstätte. Die positiven Gesundheitseffekte regelmäßiger Bewegung sind vielfach belegt, deren Förderung national verankert. Schon 600 MET-Minuten körperlicher Aktivität pro Woche reduzieren das Erkrankungsrisiko für verschiede...

Reliability and validity of a low-cost insole device to measure plantar pressure and force were evaluated. Reliability in terms of the intraclass correlation between a test and retest showed excellent agreement (≥ 0.9). In terms of validity, results indicated an overall high correlation (R²: 0.84) between the insole and force plate data. Despite, s...

INTRODUCTION: Physical activity in older adults is an important protective factor for preventing morbidity and mortality and increases well-being and independent living. Therefore, the overall aim of the so-called “Train and Win”project* is to develop a training module at the user’s home using their own TV with a motivating avatar. Recently, two us...

The purpose of this study was to investigate the temporal phases of the archery shot cycle that distinguish the arrows distance from centre, in an attempt to understand critical factors that affect performance. Fifteen archers of varying ability each performed 30 shots at 18 m. Fourteen potential predictor variables were measured for statistical mo...

The purpose of the study was to measure the demands of off-road cycling via portable spirometry, leg-power output (PO), heart rate (HR) and blood lactate (BLa) concentration. Twenty-four male competitive cyclists (age: 29±7.2 yrs, height: 1.79 ± 0.05 m, body mass: 70.0 ± 4.9 kg, VO2peak: 64.9 ± 7.5 ml·kg-1·min-1) performed simulated mountain bike c...

Objective: To investigate perception of muscular effort in individuals with multiple sclerosis (MS) and healthy controls during dynamic contractions. Design: Case-control study. Setting: MS day care center. Participants: Individuals with MS (n=28) and controls (n=28) INTERVENTIONS: Not applicable. Main outcome measures: Perceived muscular...

Walking with unstable shoes has been discussed to decrease joint loading. Typical estimates of joint loading using an inverse dynamic approach only account for net joint moments, not considering the potential role of muscular co-contraction. Therefore, the purpose of this study was to compare muscular co-contraction levels when walking with two dif...

AIM: The purpose of this study was to compare co-contraction levels around the knee when walking with an unstable shoe construction compared to walking with a regular shoe. METHODS: In this study data of one previously conducted study focusing on gait biomechanics during walking with a regular and with an unstable shoe constructions, Masai Barefoot...

Background: Resistance exercise is effective in improving muscle strength and preventing muscle weakness in multiple sclerosis (MS) patients. Control of resistance training intensity based on perceived muscular effort is applicable to healthy individuals, yet there is no evidence of its utility for MS patients. Objective: To compare perception o...

During aiming, an archer holds the stretched bow while a small piece of metal - the clicker - presses the arrow lateral against the bow. At the end of the aiming phase, the archer pulls the arrow back until the clicker slips over the arrowhead and causes a click, and then the archer shoots. To investigate the precision of the timing of this motor p...

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...

The development of a simulation based design methodology for coupled systems,consisting of at least a mechatronical and a biomechanical subsystem, should be done by therealization of a self-sustaining adaptive mountain bike shock absorber system. Within thisscope a Simpack-Simulink-Matlab simulation environment was implemented which allowssimula-ti...

The aim of this paper was to examine finger and bow string movements during archery by investigating a top Austrian athlete (FITA score = 1233) under laboratory conditions. Maximum lateral bow string deflection and angular displacements for index, third, and ring fingers between the full draw position and the end of the release were quantified usin...

Motor unit double discharges, or doublet firings, have been described as two consecutive motor unit discharges that occur with short interspike intervals. By the use of electrical stimulation protocols, short interspike intervals inserted at the beginning of a stimulation train have been shown to increase both the peak force and the rate of rise of...

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...

Spectral parameters of surface electromyography (EMG) are used to assess intramuscular coordination in terms of fatigue and motor unit recruitment. The aim of the present study was to examine changes in performance and EMG spectral parameters of the propulsive muscles during a swim bench exercise in swimmers to determine the intra-individual effect...

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...

At the end of the aiming phase, an archer pulls the arrow back a little bit before he releases the shot. This pulling back of the arrow is called the “final pull”. Simultaneous with the final pull, the archer has to hold the bow calm. The aim of this paper was to examine the motion of the bow and the final pull in highly skilled archers. From a tec...

The satellite navigation system GPS has gradually gained a usability that was never expected during ist design 30 years ago. Similar statements can also be made for other central elements of modern navigation technology like gyroscopes and accelerometers as well as microprocessors for synchronizing and processing sensor signals. GPS receivers and o...

We succeeded in obtaining PSP (Pressure-Sensitive Paint) measurements for a rugby ball. It was found that the seam of the ball is the trigger for initiating low pressure. Therefore, a slower spinning ball fluctuates during flight because of the asymmetrical pressure distribution on the sides of the ball. Based on the results from PSP measurements,...

A dynamic approach for modelling and simulation of motor unit discharge behaviour using recurrent fuzzy-techniques is presented. The model is able to generate a nominal force-time curve by means of the discharge behav-iour of a single motor unit pool using the knowledge of various seemingly isolated findings that have been reported. In several simu...

In aiming it is important that an archer’s draw-length is quite constant and that the clicker position is only a few millimeters behind the tip of the arrow. At the end of the aiming phase the archer pulls back the arrow a little bit before he releases the shot. This is called the final pull. (1993) measured the alteration of the draw-length indire...

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...

In the Olympic competitions the so-called recurve bows are used in archery. Typical characteristics of a good bow riser are little weight and high stiffness. Hence a trend in the design of risers is to reduce weight without loosing other properties. The aim of this study was to design a riser with a considerably reduced weight at a quite similar st...

Recurve bows that are used in competitions like the Olympic Games are high-technology products. Good risers are lightweight but retain a high stiffness. The aim of this study was to design a riser with a stiffness comparable to that of the lightest riser currently used by the archers of the German National Archery Team, but with a considerably redu...

Identification, structuring, prioritisation and estimation of influencing factors on athletic performance capacity are most important problems of performance diagnosis in exercise and training. Characteristics like strength, speed, endurance and coordination especially depend on muscle activity and activation respectively. Surface electromyography...