Concentric and eccentric muscle work is characterized through different biochemical activating cascades. Concentric contraction is characterized by an ATP O2 coupling dependent interaction of the myofibril proteins Aktin and Myosin. In eccentric contraction, according to the Wind­ing-filament hypothesis, a rotation movement around the thin filament is caused which is ATP independent. In addition, the processes of motor anticipation vary greatly between the two. This leads to the aim of the study: What are the differences in concentric versus eccentric muscle work concerning anticipation, perception and execution.
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This observational study used field tests to investigate the association between physiological parameters and rowing performance in athletes during ergometer and on-water Swiss national competitions. 25 Participants between 15 and 35 years who compete at national level were recruited among different clubs. We assessed anthropometric parameters such as weight, height, aerobic capacity during an incremental test on a rowing ergometer, anaerobic capacity during an on rowing ergometer Wingate test and lower limb strength and power during countermovement- and squat jumps.
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Background: Diffusion of information regarding ‘protecting athletes’ health’ and the ‘promotion of sport for health of the general population’ is a mission of National Sports Federations. Internet is a commonly used source of health-related information. The Olympic Games (OG) are an opportunity for a nation to promote the health benefits of sport.
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The fight against doping is not primarily a fight against fallible athletes and coaches but rather a fight for clean athletes and coaches. Therefore, the present study aimed to investigate how Swiss athletes and coaches perceive the doping problem and the current anti-doping policy. Two online surveys of 1040 Swiss squad coaches and 588 Swiss athletes of various sports were conducted in 2016 and 2017. 41.5% of athletes and 31.5% of coaches identified a serious doping problem in their sport. This perception varied significantly by sport (p≤0.001). 94.2% of athletes and 91.7% of coaches argued in support of a strict prohibition of doping.
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The Lausanne Youth Olympic Games in January 2020 rep­resent a unique opportunity for the canton of Vaud to ­strengthen its policy of health promotion through physical activity and sport among young people. Several factors influence physical activity and physical fitness of a population. Ecological models describe correlates of physical activity in general population and youth. However, no model describes correlates of physical fitness. To close this gap, the model of physical fitness and its correlates among children and adolescents of the canton of Vaud (PACE model) was developed.
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Background: The development of Mountain Ultra Marathon (MUM) raises several questions to health professionals, regarding the short or long-term consequences on the health of participants. Objective: to present the main acute and long-term effects of MUM on the main health issues usually studied among runners. Methods: Pragmatic review of the literature, including grey literature from the medical staff of the races, notably the Ultra-trail du Mont Blanc. Results:
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The elbow is a frequently underestimated and commonly misunderstood joint, leading to a considerable amount of clinical problems. A large part of this due to the largely overlapping and often unspecific symptoms of various diseases and injuries. A better understanding of elbow symptoms and the clinical exam of the elbow is the key to unlocking elbow pathology. This paper reviews a comprehensive and concise exam of the elbow that can easily be employed in a primary care sports medicine setting.
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The shoulder is the second most commonly injured joint in Sports Traumatology. A thorough clinical examination is mandatory for a strategic therapy regime. A standardized and, importantly, gentle and pain sparing, physical examination not only builts the basis for above mentioned, yet also provides a base in the doctor-patient relationship. The following guideline is meant to aid in these regards. Nonetheless, clinical experience is of utmost importance in combination with a correct physical examination. Hence, if hesitation is present about the diagnosis or treatment, there should be no hesitation in consulting an expert.
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Back pain has become one of the most frequent sports-related health problems. Up to 80% of the Swiss population experience at least one episode per year up to several times per week. It affects athletes of all age groups and all levels of activity equally. The causes of acute and chronic back pain are plentiful, but can be easily appreciated with a thorough and comprehensive history, concise clinical examination, and adequate imaging.
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Young competitive athletes are particularly at risk during puberty. Growth plates and apophyses are reduced in their stability by hormone influence. Epiphyses can slip, apophyses can tear out. Therefore, a regular examination of those athletes is important. The examination should focus on muscular asymmetries, or reduced range of motion of a joint. Shortened muscles have to be recon as a risk factor for apophysitis. Dysbalances of the musculature are mainly found in the trunk area. Training plans should be adapted to the increased vulnerability.
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There seems to be a lack of consensus among medical associations, professional sports bodies and medical professionals about when pre-participation evaluations (PPE) are indicated and how they should be designed. Although it is generally accepted that the primary purpose of the PPE is the identification of cardiovascular disease and risk factors for sudden cardiac death in competitive athletes, there is an ongoing debate on which methods are most apt in the screening process. Furthermore, the need of PPE has been questioned all together in leisure or hobby athletes.
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Until now, there have been no studies in Switzerland that investigate differences in the motor performance disposition of children in urban and rural as well as in traditional and physical education kindergartens. A newly developed test instrument (MOBAK-KG) was therefore used in a supra-­cantonal research project in school year 2017/18 to test the motor skills of 4- to 6-year-old children (n = 403, Ø 5,7 years, SD = .56) in the areas of “self-movement” and «object-movement».
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The actual significance and definition of hypertensive response to exercise (HRE) is still debated. Up to now, there is consensus in defining it as a systolic blood pressure value of either ≥ 210 mmHg in men and ≥ 190 mmHg in women or a diastolic blood pressure ≥ 110 mmHg during maximal exercise stress test. The mechanisms underlying an exaggerated blood pressure response to exercise are poorly understood; however, there are studies suggesting that HRE may represent a preclinical stadium of essential hypertension, which shares several common pathological mechanisms mostly related to an endothelial dysfunction and vascular stiffness.
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Moderate endurance training is known to improve cardiovascular risk factors, and prolongs life expectancy. On the other hand, there has been some discussion whether “too much” exercise might have a contrarious effect by accelerating coronary atherosclerosis. The goal of this review was to evaluate the current literature on the effects of long-term vigorous endurance training on the coronary vasculature. In summary, data point to an increased calcium score, and a higher burden of atherosclerotic plaque in male athletes compared to sedentary controls. However, the plaques found in athletes were more prone to be calcified.
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