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Sports Medicine

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https://www.readbyqxmd.com/read/28332118/nutrition-and-training-influences-on-the-regulation-of-mitochondrial-adenosine-diphosphate-sensitivity-and-bioenergetics
#1
REVIEW
Graham P Holloway
Since the seminal finding almost 50 years ago that exercise training increases mitochondrial content in skeletal muscle, a considerable amount of research has been dedicated to elucidate the mechanisms inducing mitochondrial biogenesis. The discovery of peroxisome proliferator-activated receptor γ co-activator 1α as a major regulator of exercise-induced gene transcription was instrumental in beginning to understand the signals regulating this process. However, almost two decades after its discovery, our understanding of the signals inducing mitochondrial biogenesis remain poorly defined, limiting our insights into possible novel training modalities in elite athletes that can increase the oxidative potential of muscle...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332117/fructose-metabolism-from-a-functional-perspective-implications-for-athletes
#2
REVIEW
Luc Tappy, Robin Rosset
Substantial amounts of fructose are present in our diet. Unlike glucose, this hexose cannot be metabolized by most cells and has first to be converted into glucose, lactate or fatty acids by enterocytes, hepatocytes and kidney proximal tubule cells, which all express specific fructose-metabolizing enzymes. This particular metabolism may then be detrimental in resting, sedentary subjects; however, this may also present some advantages for athletes. First, since fructose and glucose are absorbed through distinct, saturable gut transporters, co-ingestion of glucose and fructose may increase total carbohydrate absorption and oxidation...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332116/sweating-rate-and-sweat-sodium-concentration-in-athletes-a-review-of-methodology-and-intra-interindividual-variability
#3
REVIEW
Lindsay B Baker
Athletes lose water and electrolytes as a consequence of thermoregulatory sweating during exercise and it is well known that the rate and composition of sweat loss can vary considerably within and among individuals. Many scientists and practitioners conduct sweat tests to determine sweat water and electrolyte losses of athletes during practice and competition. The information gleaned from sweat testing is often used to guide personalized fluid and electrolyte replacement recommendations for athletes; however, unstandardized methodological practices and challenging field conditions can produce inconsistent/inaccurate results...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332115/periodized-nutrition-for-athletes
#4
REVIEW
Asker E Jeukendrup
It is becoming increasingly clear that adaptations, initiated by exercise, can be amplified or reduced by nutrition. Various methods have been discussed to optimize training adaptations and some of these methods have been subject to extensive study. To date, most methods have focused on skeletal muscle, but it is important to note that training effects also include adaptations in other tissues (e.g., brain, vasculature), improvements in the absorptive capacity of the intestine, increases in tolerance to dehydration, and other effects that have received less attention in the literature...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332114/training-the-gut-for-athletes
#5
REVIEW
Asker E Jeukendrup
The gastrointestinal (GI) tract plays a critical role in delivering carbohydrate and fluid during prolonged exercise and can therefore be a major determinant of performance. The incidence of GI problems in athletes participating in endurance events is high, indicating that GI function is not always optimal in those conditions. A substantial body of evidence suggests that the GI system is highly adaptable. Gastric emptying as well as stomach comfort can be "trained" and perceptions of fullness decreased; some studies have suggested that nutrient-specific increases in gastric emptying may occur...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332113/the-critical-power-concept-applications-to-sports-performance-with-a-focus-on-intermittent-high-intensity-exercise
#6
REVIEW
Andrew M Jones, Anni Vanhatalo
The curvilinear relationship between power output and the time for which it can be sustained is a fundamental and well-known feature of high-intensity exercise performance. This relationship 'levels off' at a 'critical power' (CP) that separates power outputs that can be sustained with stable values of, for example, muscle phosphocreatine, blood lactate, and pulmonary oxygen uptake ([Formula: see text]), from power outputs where these variables change continuously with time until their respective minimum and maximum values are reached and exercise intolerance occurs...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332112/perspectives-on-exertional-rhabdomyolysis
#7
REVIEW
Eric S Rawson, Priscilla M Clarkson, Mark A Tarnopolsky
Exertional (exercise-induced) rhabdomyolysis is a potentially life threatening condition that has been the subject of research, intense discussion, and media attention. The causes of rhabdomyolysis are numerous and can include direct muscle injury, unaccustomed exercise, ischemia, extreme temperatures, electrolyte abnormalities, endocrinologic conditions, genetic disorders, autoimmune disorders, infections, drugs, toxins, and venoms. The objective of this article is to review the literature on exertional rhabdomyolysis, identify precipitating factors, and examine the role of the dietary supplement creatine monohydrate...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332111/practical-issues-in-evidence-based-use-of-performance-supplements-supplement-interactions-repeated-use-and-individual-responses
#8
REVIEW
Louise M Burke
Current sports nutrition guidelines recommend that athletes only take supplements following an evidence-based analysis of their value in supporting training outcomes or competition performance in their specific event. While there is sound evidence to support the use of a few performance supplements under specific scenarios (creatine, beta-alanine, bicarbonate, caffeine, nitrate/beetroot juice and, perhaps, phosphate), there is a lack of information around several issues needed to guide the practical use of these products in competitive sport...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332110/minimizing-injury-and-maximizing-return-to-play-lessons-from-engineered-ligaments
#9
REVIEW
Keith Baar
Musculoskeletal injuries account for more than 70% of time away from sports. One of the reasons for the high number of injuries and long return to play is that we have only a very basic understanding of how our training alters tendon and ligament (sinew) structure and function. Sinews are highly dense tissues that are difficult to characterize both in vivo and in vitro. Recently, engineered ligaments have been developed in vitro using cells from human anterior cruciate ligaments or hamstring tendons. These three-dimensional tissues can be grown in a laboratory, treated with agents thought to affect sinew physiology, and then mechanically tested to determine their function...
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332109/maximizing-athletic-performance-through-innovation-education-and-practical-applications
#10
(no author information available yet)
No abstract text is available yet for this article.
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28332108/maximizing-athletic-performance-through-innovation-education-and-practical-applications
#11
EDITORIAL
Lawrence L Spriet
No abstract text is available yet for this article.
March 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28303544/intervention-strategies-used-in-sport-injury-prevention-studies-a-systematic-review-identifying-studies-applying-the-haddon-matrix
#12
REVIEW
Ingrid Vriend, Vincent Gouttebarge, Caroline F Finch, Willem van Mechelen, Evert A L M Verhagen
BACKGROUND: Prevention of sport injuries is crucial to maximise the health and societal benefits of a physically active lifestyle. To strengthen the translation and implementation of the available evidence base on effective preventive measures, a range of potentially relevant strategies should be considered. OBJECTIVE: Our aim was to identify and categorise intervention strategies for the prevention of acute sport injuries evaluated in the scientific literature, applying the Haddon matrix, and identify potential knowledge gaps...
March 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28303543/accelerometer-data-collection-and-processing-criteria-to-assess-physical-activity-and-other-outcomes-a-systematic-review-and-practical-considerations
#13
REVIEW
Jairo H Migueles, Cristina Cadenas-Sanchez, Ulf Ekelund, Christine Delisle Nyström, Jose Mora-Gonzalez, Marie Löf, Idoia Labayen, Jonatan R Ruiz, Francisco B Ortega
BACKGROUND: Accelerometers are widely used to measure sedentary time, physical activity, physical activity energy expenditure (PAEE), and sleep-related behaviors, with the ActiGraph being the most frequently used brand by researchers. However, data collection and processing criteria have evolved in a myriad of ways out of the need to answer unique research questions; as a result there is no consensus. OBJECTIVES: The purpose of this review was to: (1) compile and classify existing studies assessing sedentary time, physical activity, energy expenditure, or sleep using the ActiGraph GT3X/+ through data collection and processing criteria to improve data comparability and (2) review data collection and processing criteria when using GT3X/+ and provide age-specific practical considerations based on the validation/calibration studies identified...
March 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28290159/the-unexplored-crossroads-of-the-female-athlete-triad-and-iron-deficiency-a-narrative-review
#14
REVIEW
Dylan L Petkus, Laura E Murray-Kolb, Mary Jane De Souza
Despite the severity and prevalence of iron deficiency in exercising women, few published reports have explored how iron deficiency interacts with another prevalent and severe condition in exercising women: the 'female athlete triad.' This review aims to describe how iron deficiency may interact with each component of the female athlete triad, that is, energy status, reproductive function, and bone health. The effects of iron deficiency on energy status are discussed in regards to thyroid function, metabolic fuel availability, eating behaviors, and energy expenditure...
March 13, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28290158/authors-reply-to-davis-it-is-time-to-ban-rapid-weight-loss-from-combat-sports
#15
LETTER
Guilherme Giannini Artioli, Bryan Saunders, Rodrigo T Iglesias, Emerson Franchini
No abstract text is available yet for this article.
March 13, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28290157/comment-on-it-is-time-to-ban-rapid-weight-loss-from-combat-sports
#16
LETTER
Philip Davis
No abstract text is available yet for this article.
March 13, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28283995/comment-on-does-elite-sport-degrade-sleep-quality-a-systematic-review
#17
LETTER
Amy M Bender, Charles H Samuels
No abstract text is available yet for this article.
March 10, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28283994/author-s-reply-to-bender-and-samuels-does-elite-sport-degrade-sleep-quality-a-systematic-review
#18
LETTER
Luke Gupta, Kevin Morgan, Sarah Gilchrist
No abstract text is available yet for this article.
March 10, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28283993/development-and-validity-of-the-rating-of-fatigue-scale
#19
D Micklewright, A St Clair Gibson, V Gladwell, A Al Salman
OBJECTIVE: The purpose of these experiments was to develop a rating-of-fatigue (ROF) scale capable of tracking the intensity of perceived fatigue in a variety of contexts. METHODS: Four experiments were carried out. The first provided the evidential basis for the construction of the ROF scale. The second tested the face validity of the ROF, and the third tested the convergent and divergent validity of the ROF scale during ramped cycling to exhaustion and 30 min of resting recovery...
March 10, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28283992/training-load-monitoring-in-team-sports-a-novel-framework-separating-physiological-and-biomechanical-load-adaptation-pathways
#20
Jos Vanrenterghem, Niels Jensby Nedergaard, Mark A Robinson, Barry Drust
There have been considerable advances in monitoring training load in running-based team sports in recent years. Novel technologies nowadays offer ample opportunities to continuously monitor the activities of a player. These activities lead to internal biochemical stresses on the various physiological subsystems; however, they also cause internal mechanical stresses on the various musculoskeletal tissues. Based on the amount and periodization of these stresses, the subsystems and tissues adapt. Therefore, by monitoring external loads, one hopes to estimate internal loads to predict adaptation, through understanding the load-adaptation pathways...
March 10, 2017: Sports Medicine
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