Scandinavian journal of medicine & science in sports
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Scand J Med Sci Sports · Dec 2018
ReviewAccidental hypothermia in recreational activities in the mountains: A narrative review.
The popularity of recreational activities in the mountains worldwide has led to an increase in the total number of persons exposed to cold and extreme environments through recreation. There is little conclusive evidence about the risk of hypothermia for specific activities or populations, nor is it clear which activities are represented in the literature. This is a non-systematic review of accidental hypothermia in different recreational activities in the mountains, with a specific focus on outdoor or winter activities that potentially involve cold exposure. ⋯ Hypothermia in skiers, snowboarders, and glacier-based activities is most often associated with accidents occurring off-piste or in the backcountry (crevasse, avalanche). Organizers of outdoor events also have a role in reducing the incidence of hypothermia through medical screening and other preparedness measures. More complete collection and reporting of data on mild hypothermia and temperature measurement would improve our understanding of the incidence of hypothermia in outdoor recreation in future.
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Scand J Med Sci Sports · Dec 2018
An experiment on the impact of coaches' and athlete leaders' competence support on athletes' motivation and performance.
Grounded in the Cognitive Evaluation Theory, the present experiment aimed to compare the relative impact of competence support provided by coaches versus athlete leaders on players' competence satisfaction, intrinsic motivation, and performance. ⋯ Our findings highlight the importance of providing competence support to enhance team performance. Given athlete leaders' unique impact on teammates' competence satisfaction and motivation, instructing athlete leaders how to provide competence support constitutes an important motivational pathway for coaches to optimize team functioning.
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Scand J Med Sci Sports · Oct 2018
No association between rate of torque development and onset of muscle activity with increased risk of hamstring injury in elite football.
Hamstring injuries remain a significant burden in sports that involve high-speed running. In elite male football, hamstring injury has repeatedly been identified as the most common non-contact injury, representing 12% of all injuries. As the incidence remains high, investigations are aimed at better understanding how to improve prevention efforts. ⋯ For both onset of muscle activity and rate of torque development, there were no significant differences between any of the variables (P > .05), with small effect sizes detected across all the different variables (d < 0.3). Rate of torque development and onset of muscle activity were not associated with a risk of future hamstring injury. The use of these measures as part of a periodic health evaluation to identify risk of hamstring injury is unsupported.
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Scand J Med Sci Sports · Oct 2018
Return to play, performance, and career duration after anterior cruciate ligament rupture: A case-control study in the five biggest football nations in Europe.
A media-based collection and further analysis of relative return to play (RTP) rates and the corresponding quality of play after anterior cruciate ligament (ACL) rupture in top-level football was the aim of our study. In the 5-year case-control study, male players from the first two leagues of the five top leagues in Europe, who sustained a total ACL rupture during the season 2010/11 and/or 2011/12, were included. For them and a matched control sample (ratio 1:2), data were retrieved from the publicly available and validated media-based platforms (transfermarkt.de & whoscored.com) until the end of season 2016/17. ⋯ Survival analysis revealed a systematic group difference in career duration compared to controls (Cox-Mantel's χ2 = 5.8; P = 0.016). Game performance (scoring points, P < 0.001; rates/number of completed passes, P = 0.048; and minutes played, P < 0.001) was lower in the ACL athletes than in the matching group in the RTP and post-RTP seasons. Although absolute and relative RTP rates after ACL reconstruction are high in professional football, career duration and game performance are lower than in the reference group.