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https://www.readbyqxmd.com/read/29922380/skeletal-muscle-cell-damage-indicators-in-volleyball-players-after-the-competitive-phase-of-the-annual-training-cycle
#1
Mateusz Radojewski, Tomasz Podgórski, Barbara Pospieszna, Jakub Kryściak, Ewa Śliwicka, Joanna Karolkiewicz
The aim of the study was to evaluate the impact of the competitive phase on physiological and metabolic indices and selected markers of skeletal muscle damage in male volleyball players. The study group consisted of 24 young male volleyball players. During the study, participants underwent two series of measurements, before and after the competitive phase of the annual training cycle. In both study terms, players performed an incremental treadmill running test to determine their ventilatory threshold and maximal oxygen uptake...
June 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29922184/standardized-assessment-of-resistance-training-induced-subjective-symptoms-and-objective-signs-of-immunological-stress-responses-in-young-athletes
#2
Christian Puta, Thomas Steidten, Philipp Baumbach, Toni Wöhrl, Rico May, Michael Kellmann, Marco Herbsleb, Brunhild Gabriel, Stephanie Weber, Urs Granacher, Holger H W Gabriel
From a health and performance-related perspective, it is crucial to evaluate subjective symptoms and objective signs of acute training-induced immunological responses in young athletes. The limited number of available studies focused on immunological adaptations following aerobic training. Hardly any studies have been conducted on resistance-training induced stress responses. Therefore, the aim of this observational study was to investigate subjective symptoms and objective signs of immunological stress responses following resistance training in young athletes...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29921524/impact-loading-history-modulates-hip-fracture-load-and-location-a-finite-element-simulation-study-of-the-proximal-femur-in-female-athletes
#3
Shinya Abe, Nathaniel Narra, Riku Nikander, Jari Hyttinen, Reijo Kouhia, Harri Sievänen
Sideways falls impose high stress on the thin superolateral cortical bone of the femoral neck, the region regarded as a fracture-prone region of the hip. Exercise training is a natural mode of mechanical loading to make bone more robust. Exercise-induced adaptation of cortical bone along the femoral neck has been previously demonstrated. However, it is unknown whether this adaption modulates hip fracture behavior. The purpose of this study was to investigate the influence of specific exercise loading history on fall-induced hip fracture behavior by estimating fracture load and location with proximal femur finite element (FE) models created from magnetic resonance images (MRI) of 111 women with distinct exercise histories: 91 athletes (aged 24...
June 8, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29910424/the-effects-of-a-4-week-intensified-training-and-competition-period-on-salivary-hormones-immunoglobulin-a-illness-symptoms-and-mood-state-in-elite-synchronised-swimmers
#4
Amy Tanner, Shannon Day
Given the limited research into the physiological and psychological demands of elite synchronised swimming, the aim of this study was to examine 10 elite female synchronised swimmers and analyse the relationship between training load, stress, illness episodes, and salivary biomarkers during a period of training and competition. Saliva samples were collected before (BASE), during an intensified training camp (CAMP), during an international competition period (COMP), and post competition recovery (REC) for analysis of cortisol, testosterone, and secretory immunoglobulin A (SIgA)...
September 1, 2017: Sports
https://www.readbyqxmd.com/read/29910349/differences-among-three-measures-of-reaction-time-based-on-hand-laterality-in-individual-sports
#5
Dana Badau, Bilgehan Baydil, Adela Badau
(1) Aim: The study aimed at assessing simple-reaction, recognition and cognitive-reaction times to visual stimuli among student athletes: boxing, gymnastics, taekwondo, judo, karate and wrestling, using computer games tests. (2) Methods: Our study involved 332 students and athletes. We applied three types of computer tests to measure the dominant and non-dominant hands: the simple motor reaction time through the Human Benchmark test, the recognition time by the Hit-the-dots and the cognitive reaction time by the Trail making test part B...
May 19, 2018: Sports
https://www.readbyqxmd.com/read/29910346/the-effects-of-sleep-extension-on-sleep-performance-immunity-and-physical-stress-in-rugby-players
#6
Richard Swinbourne, Joanna Miller, Daniel Smart, Deborah K Dulson, Nicholas Gill
(1) Background: The purpose of the present study was to examine the efficacy of sleep extension in professional rugby players. The aims were to: (i) characterise sleep quantity in elite rugby players and determine changes in immune function and stress hormone secretion during a pre-season training programme; (ii) evaluate the efficacy of a sleep extension intervention in improving sleep, markers of physical stress, immune function and performance. (2) Methods: Twenty five highly trained athletes from a professional rugby team (age (mean ± SD) 25 ± 2...
May 10, 2018: Sports
https://www.readbyqxmd.com/read/29909988/pelvic-floor-laxity-a-not-so-rare-but-unrecognized-form-of-daytime-urinary-incontinence-in-peripubertal-and-adolescent-girls
#7
Stuart B Bauer, Evalynn Vasquez, Marc Cendron, May M Wakamatsu, Jeanne S Chow
INTRODUCTION: Stress urinary incontinence (SUI) is common among older multiparous females but rarely reported in active, young girls. OBJECTIVES: Our hypothesis is: physically active adolescent females develop pelvic floor laxity demonstrable on upright VCUG. Our objectives are to (1) increase awareness of SUI in young females, (2) test our hypothesis with an upright VCUG, and (3) report effectiveness of step-wise management. STUDY DESIGN: A retrospective review was performed of nulliparous girls with only SUI seen from 2000 to 2015, who were evaluated with upright voiding cystourethrography (VCUG) (bladder descent defined as ≥2 cm drop of bladder neck below pubic ramus at capacity)...
June 7, 2018: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/29909738/relationships-between-hoffman-reflex-parameters-trait-stress-and-athletic-performance
#8
Rasool Bagheri, Mohammad Reza Pourahmadi, Rozita Hedayati, Ziaeddin Safavi-Farokhi, Atefeh Aminian-Far, Sadegh Tavakoli, Jafar Bagheri
This study evaluated the relationships between trait stress, Hoffman reflex, and performance among 36 healthy amateur male athletes. We first obtained a trait stress questionnaire from participants and then assigned them to high- and low-stress groups. We next recorded Hoffman reflex data from the soleus and lateral gastrocnemius muscles and then examined their athletic performance on testing protocols separated by a 72-hour washout period. Performance testing utilized vertical jump height, 20 -m sprint time, and standing stork tests...
January 1, 2018: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29893180/potential-adverse-cardiac-remodelling-in-highly-trained-athletes-still-unknown-clinical-significance
#9
Luigi Gabrielli, Marta Sitges, Mario Chiong, Jorge Jalil, María Ocaranza, Silvana Llevaneras, Sebastian Herrera, Rodrigo Fernandez, Rodrigo Saavedra, Fernando Yañez, Luis Vergara, Alexis Diaz, Sergio Lavandero, Pablo Castro
Moderate endurance exercise has long been considered an essential element to maintain cardiovascular health, and sedentary behaviour in the general population has been related to a significant increase in all-causes of mortality, cardiovascular disease mortality and cardiovascular disease incidence. However, a growing group of people performs an intense exercise that leads to multiple heart adaptive changes that are collectively called "athlete's heart". In this review, we discussed the evidence of cardiac remodelling process secondary to repetitive and strenuous exercise in some predisposed athletes that produces intense and probably deleterious changes in cardiac morphology and function with no clear clinical significance in long-term follow-up...
June 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29889150/core-and-back-rehabilitation-for-high-speed-rotation-sports-highlight-on-lacrosse
#10
Heather K Vincent, Kevin R Vincent
Lacrosse is a fast-paced game that incorporates elements from multiple sports, such as soccer, basketball, baseball, tennis, and hockey. The sport involves rapid changes of direction, endurance, sprinting, physical contact, rotational movement, passing, and shooting. Passing and shooting are further complicated by having a weighted object (ball) at the end of a long moment arm (crosse) which places increased stress on the body segments. Thus, it is important to properly prepare for sport participation by improving strength, endurance, and dynamic stability of the postural and core stability muscles...
June 2018: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29881693/ulnar-collateral-ligament-repair-with-suture-bridge-augmentation
#11
Ekaterina Urch, Anthony DeGiacomo, Christos D Photopoulos, Orr Limpisvasti, Neal S ElAttrache
The gold standard for management of elbow ulnar collateral ligament (UCL) injuries in elite athletes is reconstruction of the UCL with a tendon graft. Over the past several years, UCL repair for acute tears, as well as partial tears, in young athletes has gained increasing popularity, with studies reporting good outcomes and high rates of return to sports. Additionally, there is increased interest in ligament augmentation using the InternalBrace concept. A recent technique paper describes a direct repair of the UCL augmented with a spanning suture bridge...
March 2018: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29878984/physiological-responses-to-swimming-repetitive-ice-miles
#12
Beat Knechtle, Mirko Stjepanovic, Celina Knechtle, Thomas Rosemann, Caio V Sousa, Pantelis T Nikolaidis
Knechtle, B, Stjepanovic, M, Knechtle, C, Rosemann, T, Sousa, CV, and Nikolaidis, PT. Physiological responses to swimming repetitive "Ice Miles." J Strength Cond Res XX(X): 000-000, 2018-"Ice Mile" swimming (i.e., 1,608 m in water of below 5° C) is becoming increasingly popular. Since the foundation of the International Ice Swimming Association (IISA) in 2009, official races are held as World Cup Races and World Championships. Ice swimming was a demonstration sport at the 2014 Winter Olympics in Sochi, Russia...
June 6, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29877674/risk-factors-for-precompetitive-sleep-behavior-in-elite-female-athletes
#13
Maria-Raquel Silva, Teresa Paiva
BACKGROUND: Sleep is of major importance for the athletes' short and long-term health, performance and recovery; however, published studies on athletes' sleep and even fewer before competition are scarce. This study evaluated the risk factors of sleep in young female gymnasts before an international competition. METHOD: Sixty-seven rhythmic gymnasts (M=18.7,SD=2.9yrs.) of high performance (M=36.6,SD=7.6h/week) were evaluated regarding training and sport practice, body composition, sleep duration, daytime sleepiness by the Epworth Sleepiness Scale, sleep quality by the Pittsburgh Sleep Quality Index, precompetitive anxiety by the Sport Competition Anxiety Test form A, and detailed dietary intake just prior to a world competition...
June 7, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29877673/post-activation-potentiation-improves-athletic-performance-without-affecting-plasma-oxidative-level
#14
Tania Gamberi, Francesca Magherini, Tania Fiaschi, Pietro A Modesti, Massimo Gulisano, Mario Marella, Paolo Bosi, Paolo Spicuglia, Marta Radini, Alessandra Modesti
BACKGROUND: Several authors reported evidences for Post Activation Potentiation but so far, few studies suggested suitable methods for use it to improve performance. On the other hand, it is well known that a fatiguing exercise can leads to a temporary imbalance between the production of reactive oxygen species (ROS) and their disposal. The purpose of our research was to evaluate the effects on performance and plasma oxidative stress of a specific program of conditioning in replacement of traditional sequences of warm-up...
June 7, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29868431/arthroscopic-management-for-acetabular-rim-stress-fracture-and-osteochondritis-dissecans-in-the-athlete-with-hip-dysplasia
#15
Soshi Uchida, Yuki Shimizu, Yohei Yukizawa, Hitoshi Suzuki, Cecilia Pascual-Garrido, Akinori Sakai
Intra-articular lesions are common in patients with acetabular hip dysplasia. Rim stress fractures (RSFs) have also been described in patients with acetabular hip dysplasia. This lesion is believed to be a result of an unfused secondary ossification center or a stress fracture that could be caused by repetitive impingement of an abnormal-shaped femoral head-neck junction. In addition, osteochondritis dissecans of the acetabulum is a rare condition that can also result from impingement and has been described in patients with hip dysplasia...
May 2018: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29867682/effect-of-mindfulness-based-stress-reduction-mbsr-in-increasing-pain-tolerance-and-improving-the-mental-health-of-injured-athletes
#16
Warhel Asim Mohammed, Athanasios Pappous, Dinkar Sharma
Literature indicates that injured athletes face both physical and psychological distress after they have been injured. In this study, a Mindfulness Based Stress Reduction (MBSR) was utilised as an intervention for use during the period of recovery with injured athletes and, to the best of our knowledge, this is the first study using MBSR as an intervention for this purpose. Objective: The aim of this research was to investigate the role of MBSR practise in reducing the perception of pain and decreasing anxiety/stress, as well as increasing pain tolerance and mindfulness...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29860439/aviator-s-heart-a-case-of-athlete-s-heart-in-an-active-duty-male-naval-aviator
#17
Ilya V Ryaboy, James A Watts, Megan L Barnwell
Athlete's heart is the condition of cardiac remodeling as a result of physiologic stress induced by regular strenuous physical activity by professional or elite amateur individuals. The literature describes several characteristics of the athletic heart, including left ventricular hypertrophy, increased left ventricular mass, right ventricular dilatation, atrial enlargement, electrocardiographic changes, and abnormalities on cardiac magnetic resonance imaging. We present a case of athletic heart in an exceptionally physically fit active duty naval aviator who experienced syncope and underwent extensive cardiac testing...
May 31, 2018: Military Medicine
https://www.readbyqxmd.com/read/29859672/effects-of-stress-and-mental-toughness-on-burnout-and-depressive-symptoms-a-prospective-study-with-young-elite-athletes
#18
Markus Gerber, Simon Best, Fabienne Meerstetter, Marco Walter, Sebastian Ludyga, Serge Brand, Renzo Bianchi, Daniel J Madigan, Sandrine Isoard-Gautheur, Henrik Gustafsson
OBJECTIVES: To examine in a sample of young elite athletes (a) the presence of clinically relevant symptoms of burnout and depression, and (b) a possible interaction of perceived stress and mental toughness in the prediction of burnout and depressive symptoms. DESIGN: 6-month prospective study. METHODS: A representative sample of 257 young elite athletes (M=16.82years, SD=1.44, 36% females) was recruited in North-Western Switzerland. 197 athletes were followed-up across a 6-month period...
May 18, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29847420/sex-based-differences-in-common-sports-injuries
#19
Cordelia W Carter, Mary Lloyd Ireland, Anthony E Johnson, William N Levine, Scott Martin, Asheesh Bedi, Elizabeth G Matzkin
The patient's sex plays an important role in mediating the risk for, and experience of, disease. Injuries of the musculoskeletal system are no exception to this phenomenon. Increasing evidence shows that the incidence, clinical presentation, and treatment outcomes for male and female patients with common sports injuries may vary widely. Stress fracture, which is associated with the female athlete triad, is a sports injury with known sex-based differences. Other common sports-related injuries may also have distinct sex-based differences...
May 28, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29845840/effects-of-acute-psychological-stress-on-athletic-performance-in-elite-male-swimmers
#20
Jacqueline Rano, Cecilia Fridén, Frida Eek
BACKGROUND: While physical activity has been shown to affect psychological as well as physiological stress responses, less research has explored the effects of acute stress on athletic performance. The current study hence aimed to investigate the effect of an Acute Psychological Stress (APS) provocation on performance and plasma lactate concentration during a following 200m swim race among male elite swimmers. Furthermore, associations between physiological stress responses (salivary cortisol and testosterone), and outcome measures (speed and lactate) were explored...
May 29, 2018: Journal of Sports Medicine and Physical Fitness
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