Jiri Dvorak

Jiri Dvorak
Schulthess Klinik, Zürich | KWS · Spine Unit, dept of Neurology

Prof. Dr.

About

592
Publications
299,468
Reads
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44,709
Citations
Additional affiliations
January 2008 - December 2014
University of the Witwatersrand
Position
  • adviser, research collaborator
January 1987 - present
Schulthess Klinik, Zürich
Position
  • Consultant

Publications

Publications (592)
Article
Objectives Our large-scale cluster randomised controlled trial aimed to investigate the effects on health knowledge and enjoyment of an 11 week ‘health education through football’ programme for children aged 10–12 years old. Methods 3127 Danish school children (49% girls) aged 10–12 years from a total of 154 schools located in 63% of the Danish mun...
Article
Objective To investigate the underlying causes and regional patterns of sudden death in football (soccer) players worldwide to inform and improve existing screening and prevention measures. Methods From 2014 to 2018 cases of sudden cardiac death (SCD), survived sudden cardiac arrest (SCA) and traumatic sudden death were recorded by media monitorin...
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Epidemiological studies of injury in elite and recreational golfers have lacked consistency in methods and definitions employed and this limits comparison of results across studies. In their sports-generic statement, the Consensus Group recruited by the IOC (2020) called for sport-specific consensus statements. On invitation by International Golf F...
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Injury and illness surveillance, and epidemiological studies, are fundamental elements of concerted efforts to protect the health of the athlete. To encourage consistency in the definitions and methodology used, and to enable data across studies to be compared, research groups have published 11 sport-specific or setting-specific consensus statement...
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Background Injury and illness surveillance, and epidemiological studies, are fundamental elements of concerted efforts to protect the health of the athlete. To encourage consistency in the definitions and methodology used, and to enable data across studies to be compared, research groups have published 11 sport- or setting-specific consensus statem...
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Purpose We compared the value of different uni- and multimodal intraoperative neurophysiological monitoring (IONM) methods on the detection of neurological complications during spine surgery. Methods IONM data derived from sensory spinal and cortical evoked potentials combined with continuous electromyography monitoring, motor evoked potentials an...
Article
There has been an increased focus and awareness of head injury and sport-related concussion (SRC) across all sports from the medical and scientific communities, sports organisations, legislators, the media and the general population. Soccer, in particular, has been a focus of attention due to the popularity of the game, the frequency of SRC and the...
Article
Background To assess the effects of the injury prevention programme ‘11+ Kids’ on reducing severe injuries in 7 to 13 year old football (soccer) players. Methods Football clubs (under-9, under-11 and under-13 age groups) from the Czech Republic, Germany, the Netherlands and Switzerland were cluster-randomised (clubs) into an intervention (INT) and...
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Objective To evaluate a potential reduction in injury related healthcare costs when using the ‘11+ Kids’ injury prevention programme compared with a usual warmup in children’s football. Methods This cost effectiveness analysis was based on data collected in a cluster randomised controlled trial over one season from football teams (under-9 to under...
Article
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Objective: The objective of this study was to assess the efficacy of a newly developed warm-up programme ('11+ Kids') regarding its potential to reduce injuries in children's football. Methods: Children's football teams (under 9 years, under 11 years, and under 13 years age groups) from Switzerland, Germany, the Czech Republic and the Netherland...
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We evaluated effects of the school‐based intervention “FIFA 11 for Health” for Europe on health and fitness profile in 10‐ to 12‐year‐old Faroese schoolchildren. 392 fifth‐grade children were randomized into a control group (CG: n = 100, 11.1 ± 0.3 years, 149.0 ± 6.7 cm, 42.4 ± 10.2 kg) and an intervention group (IG: n = 292, 11.1 ± 0.3 years, 150....
Article
Objective: To identify the prevalence, frequency of use, and effects of analgesic pain management strategies used in elite athletes. Design: Systematic literature review. Data sources: Six databases: Ovid/Medline, SPORTDiscus, CINAHL, Embase, Cochrane Library, and Scopus. Eligibility criteria for selecting studies: Empirical studies involvin...
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Nutrition usually makes a small but potentially valuable contribution to successful performance in elite athletes, and dietary supplements can make a minor contribution to this nutrition program. Nonetheless, supplement use is widespread at all levels of sport. Products described as supplements target different issues, including the management of m...
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Nutrition usually makes a small but potentially valuable contribution to successful performance in elite athletes, and dietary supplements can make a minor contribution to this nutrition programme. Nonetheless, supplement use is widespread at all levels of sport. Products described as supplements target different issues, including (1) the managemen...
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Full-text available
Objective: Recent studies have shown promising effects of physical activity on cognitive function, but there is a need to investigate this link in real-life settings such as schools. Hence, the objective of the present pilot study was to investigate whether the school-based physical activity programme "FIFA 11 for Health" for Europe could improve...
Article
Objectives: Football (soccer) is very popular amongst children. Little is known about risk factors for football injuries in children. The aim was to analyse potential injury risk factors in 7 to 12 year old players. Design: Prospective epidemiological study. Methods: We collected prospective data in Switzerland and the Czech Republic over two...
Article
Pain is a common problem among elite athletes and is frequently associated with sport injury. Both pain and injury interfere with the performance of elite athletes. There are currently no evidence-based or consensus-based guidelines for the management of pain in elite athletes. Typically, pain management consists of the provision of analgesics, res...
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Objective To describe the pattern of injuries and illnesses sustained during the Games of the XXXI Olympiad, hosted by Rio de Janeiro from 5 to 21 August 2016. Methods We recorded the daily incidence of athlete injuries and illnesses (1) through the reporting of all National Olympic Committee (NOC) medical teams and (2) in the polyclinic and medic...
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Objective To identify areas of priority and activity for international sportsfederations (IFs) with respect to athlete health and safety, and global health. Results serve to direct the work of the Association of Summer Olympic IF Medical and Scientific Consultative Group, the International Olympic Committee and to influence IFs’ planning and priori...
Article
The Concussion Recognition Tool 5 (CRT5) is the most recent revision of the Pocket Sport Concussion Assessment Tool 2 that was initially introduced by the Concussion in Sport Group in 2005. The CRT5 is designed to assist non-medically trained individuals to recognise the signs and symptoms of possible sport-related concussion and provides guidance...
Article
Objective Recently the potential long-term effect of sports-related head injuries has been discussed. To develop effective injury prevention strategies, epidemiological information is required. The aim of this study was to analyse the incidence and characteristics of head and neck match injuries. Design Prospective cohort study. Setting FIFA tour...
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Background: Sport-related concussion (SRC) is a clinical diagnosis made after a sport-related head trauma. Inconsistency exists regarding appropriate methods for assessing SRC, which focus largely on symptom-scores, neurocognitive functioning and postural stability. Design: Systematic literature review. Data sources: MEDLINE, EMBASE, PsycINFO,...
Article
Objectives: Various definitions for concussion have been proposed, each having its strengths and weaknesses. We reviewed and compared current definitions and identified criteria necessary for an operational definition of sports-related concussion (SRC) in preparation of the 5th Concussion Consensus Conference (Berlin, Germany). We also assessed th...
Article
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This paper presents the Sport Concussion Assessment Tool 5th Edition (SCAT5), which is the most recent revision of a sport concussion evaluation tool for use by healthcare professionals in the acute evaluation of suspected concussion. The revision of the SCAT3 (first published in 2013) culminated in the SCAT5. The revision was based on a systematic...
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Objective: Systematic review of possible long-term effects of sports-related concussion in retired athletes. Data sources: Ten electronic databases. Study selection: Original research; incidence, risk factors or causation related to long-term mental health or neurological problems; individuals who have suffered a concussion; retired athletes a...
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The 2017 Concussion in Sport Group (CISG) consensus statement is designed to build on the principles outlined in the previous statements1–4 and to develop further conceptual understanding of sport-related concussion (SRC) using an expert consensus-based approach. This document is developed for physicians and healthcare providers who are involved in...
Article
This paper presents the Sport Concussion Assessment Tool 5th Edition (SCAT5), which is the most recent revision of a sport concussion evaluation tool for use by healthcare professionals in the acute evaluation of suspected concussion. The revision of the SCAT3 (first published in 2013) culminated in the SCAT5. The revision was based on a systematic...
Article
The Concussion Recognition Tool 5 (CRT5) is the most recent revision of the Pocket Sport Concussion Assessment Tool 2 that was initially introduced by the Concussion in Sport Group in 2005. The CRT5 is designed to assist non-medically trained individuals to recognise the signs and symptoms of possible sport-related concussion and provides guidance...
Article
Full-text available
This article presents the Child Sport Concussion Assessment Tool 5th Edition (Child SCAT5). The Sport Concussion Assessment Tool was introduced in 2004, following the 2nd International Conference on Concussion in Sport in Prague, Czech Republic. Following the 4th International Consensus Conference, held in Zurich, Switzerland, in 2012, the SCAT 3rd...
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The purpose of this paper is to summarise the methodology for the 5th International Consensus Conference on Concussion in Sport. The 18 months of preparation included engagement of a scientific committee, an expert panel of 33 individuals in the field of concussion and a modified Delphi technique to determine the primary questions to be answered. T...
Article
Aim or objective To examine the effectiveness of concussion prevention strategies in reducing concussion risk in sport. Design Systematic review according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) guidelines. Data sources Eleven electronic databases searched and hand-search of references from selected stud...
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Objectives Amyotrophic lateral sclerosis (ALS) has been reported to occur with increased incidence amongst physically active people. The role of extrinsic risk factors as physical activity, head trauma and drug/pesticide‐exposure in the pathophysiology of ALS and especially in the context of practising sports remains controversial. Materials and M...
Article
Head injuries are considered harmful in children. We analysed head and neck injuries in organised football in 7 to 12 year old children. Data for this analysis were obtained from a prospective cohort study over two consecutive football seasons in two European countries, and a randomised intervention trial over one season in four European countries....
Article
A decade ago, Blair1 pondered the future of physical activity research, much of which has since come to pass. More recently, a BJSM Blog2 invited readers to consider how their future research would look. Given the increased international focus on reducing injury/illness in athletes, it is timely to consider what research needs to be undertaken and...
Article
The aim of this study was to assess the prevalence of health problems and associated risk factors in former elite female football players. A cross-sectional research design was employed, using an online questionnaire on personal characteristics and health complaints during/after the career. One hundred fifty-two (response rate: 62.0%) former first...
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Benno Ejnisman,1 Gisele Barbosa,1 Carlos V Andreoli,1 A de Castro Pochini,1 Thiago Lobo,2 Rodrigo Zogaib,2 Moises Cohen,1 Mario Bizzini,3 Jiri Dvorak3 1Department of Orthopaedics, Federal University of São Paulo, 2Sports Medicine Department, Santos FC, São Paulo, Brazil; 3FIFA-Medical Assessment and Research Centre, Schulthess Clinic, Zurich, Switz...
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Small-sided football training is an intense, versatile, enjoyable and social training type of exercise that combines high-intensity cardiovascular, endurance and strength training for participants across the lifespan. A mere 2×60 min weekly training is effective for broad-spectrum prevention and treatment of lifestyle diseases. Our conclusion is ba...
Article
Football is currently the most popular sporting activity in the world. Multiple reports have shown that a high incidence of osteoarthritis is found in football players. Evidence clearly shows that traumatic injury significantly predisposes players for such pathophysiology. Injuries are frequent in amateur as well as professional football players, w...
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Background The mental health of elite athletes has received increasing attention in recent years, but no study has evaluated the career–time prevalence of depression, and very few have analysed risk factors of mental health problems during or after the career. Methods 157 (response rate 64.1%) female players who played in the German First League an...
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Objectives To evaluate whether a modified ‘FIFA 11 for Health’ programme for non-communicable diseases had effects on body composition, blood pressure and physical fitness of Danish schoolchildren aged 10–12 years. Design A cluster-randomised controlled study with 7 intervention and 2 control schools. Participants 546 Danish 5th grade municipal sch...
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Aim: To modify the 'FIFA 11 for Health' programme to the European situation, and to assess its effects on health knowledge and well-being in Danish school children. Method: A two-cohort study with seven intervention and two control schools. Of the 546 Danish children (boys 269; girls 277) of mean age 11.1 (±0.4) years from five city and four cou...
Technical Report
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This report provides a systematic review of empirical studies examining economic inputs and outputs/outcomes of participation in physical education, physical activity, and sport (summarised under ‘physical activity’). The reviewed studies have been evaluated based on different levels of evidence-based research. Only a few studies have related econ...
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CPR 11. Health. IOS (iPhone 4 and above), Android (versions 2.3.3 and above), Windows Phone. Free. In just 11 steps, the CPR 11 mobile application presents a simple plan, with clear and precise instructions, on how to recognise a sudden cardiac arrest (SCA), provide immediate and adequate response with efficient compressions and ventilations, h...
Article
Background: As part of a risk-management approach, sound epidemiological data are needed to develop prevention programs. A recent review on soccer injuries of players younger than 19 years concluded that prospective data concerning children are lacking. Purpose: To analyze the incidence and characteristics of soccer injuries in children aged 7 t...
Article
The European Resuscitation Council (ERC) 2015 Guidelines for Resuscitation were published recently. For the first time, these guidelines included a subsection on 'cardiac arrest during sports activities' in the section dealing with cardiac arrest in special circumstances, endorsing both the importance and unique nature of this form of cardiac arres...
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Objective. To examine the use ofmedications and nutritional supplements among top-levelmale futsal players during international tournaments.Materials and Methods.This retrospective survey of the four consecutive 2000 to 2012 FIFA(F´ed´eration Internationale de Football Association) Futsal World Cup tournaments analyzes data about the use of medicat...
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BACKGROUND: The Fédération Internationale de Football Association (FIFA) 11+ program has been shown to be an effective injury prevention program in the female soccer cohort, but there is a paucity of research to demonstrate its efficacy in the male population. HYPOTHESIS: To examine the efficacy of the FIFA 11+ program in men's collegiate United St...
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Objective To examine the use of medication of top-level male players during the 2014 FIFA World Cup Brazil. Design Retrospective survey. Participants/information 736 top level players. Setting The teams’ physicians disclosed a list of the medications used by each player within 72 h before each match of the 2014 FIFA World Cup Brazil. Outcome measur...
Chapter
Playing football has many health benefits but it is also associated with a certain risk of injury. There is extensive literature on the frequency and characteristics of football injuries, and several scientific studies on injury prevention programmes in amateur football players have been published. Research has shown that noncontact injuries in foo...
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Background: Nowadays, doping is an intricate dilemma. Football is the nationally popular sport in Iran. On the other hand, doping is a serious health hazard sport faces today. Studies dealing with athletes' knowledge, attitudes and behavior concerning doping in football are scarce. Objectives: Therefore, we aimed to investigate the knowledge and...
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Sudden cardiac death is the most common cause of unnatural death in football. To prevent and urgently manage sudden cardiac arrest on the football field-of-play, F-MARC (FIFA Medical and Research Centre) has been fully committed to a programme of research, education, standardisation and practical implementation. This strategy has detected football...
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