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https://www.readbyqxmd.com/read/29679247/neuromuscular-and-electromechanical-properties-of-ultra-power-athletes-the-traceurs
#1
Sidney Grosprêtre, Philippe Gimenez, Alain Martin
PURPOSE: Practising a power-type activity over years can shape the neuromuscular profile of athletes. This study aimed at comparing the neuromuscular profile of a non-trained group (NT, n = 10) to power athletes practising Parkour (= traceurs, group PK, n = 11), an activity consisting of jumping obstacles mostly in an urban landscape. METHODS: Maximal isometric plantar flexion force (MVC) and rate of torque development (RTD) were evaluated, and neuromuscular function of triceps surae muscles was assessed and compared between groups through the analysis of evoked potentials from posterior tibial nerve stimulation...
April 20, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29672225/probiotic-supplementation-in-trained-trotter-horses-effect-on-blood-clinical-pathology-data-and-urine-metabolomic-assessed-in-field
#2
Luca Laghi, Chenglin Zhu, Giuseppe Campagna, Giacomo Rossi, Marilena Bazzano, Fulvio Laus
The attention of sports community towards probiotic supplementation as a way to promote exercise and training performance, together with good health, has increased in recent years. This has applied also to horses, with promising results. Here, for the first time, we tested a probiotic mix of several strains of alive bacteria typically employed for humans to improve the training performance of Standardbred horses in athletic activity. To evaluate its effects on the horse performance, we measured lactate concentration in blood, a translational outcome largely employed for the purpose, combined with the study of hematological and biochemical parameters, together with urine from a metabolomics perspective...
April 19, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29672132/remplissage-versus-modified-latarjet-for-off-track-hill-sachs-lesions-with-subcritical-glenoid-bone-loss
#3
Justin Shu Yang, Nima Mehran, Augustus D Mazzocca, Michael L Pearl, Vincent W Chen, Robert A Arciero
BACKGROUND: Off-track Hill-Sachs lesions have been associated with high rates of recurrent shoulder instability. Both arthroscopic Bankart with remplissage and modified Latarjet have been described to treat off-track Hill-Sachs lesions. However, few comparative studies exist between the 2 techniques in heterogeneous populations. HYPOTHESIS: Remplissage would have similar recurrence rates and clinical outcomes to modified Latarjet for off-track Hill-Sachs lesions with subcritical glenoid bone loss...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29666559/assessing-performance-in-pre-season-wrestling-athletes-using-biomarkers
#4
Ionas Papassotiriou, Artemissia-Phoebe Nifli
Introduction: Although regular training introduces the desired changes in athletes' metabolism towards optimal final performance, literature is rarely focusing on the metabolic responses off-competition. Therefore, the aim of this study was to evaluate biochemical indices during typical preseason training in wrestling athletes. Materials and methods: Twenty male freestyle and Greco-roman wrestlers (14 to 31 years) followed a typical session of the preparatory phase...
June 15, 2018: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/29658533/accelerometer-profile-of-motion-of-the-pelvic-girdle-in-butterfly-swimming
#5
Zbigniew Staniak, Krzysztof Buśko, Michał Górski, Anna Pastuszak
PURPOSE: The aim of the study was to develop a method to measure and analyse kinematics of movement of the pelvic girdle in butterfly swimming in order to support training of technical skills. METHODS: A device for recording triaxial accelerations and triaxial rotational angular velocities was mounted on the dorsal part of the pelvic girdle of athlete. The measurements were performed in ten elite butterfly swimmers (age: 23.1 ± 3.7 years, body height: 187.6 ± 4...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29657436/upper-extremity-weightlifting-injuries-diagnosis-and-management
#6
REVIEW
Kayvon Golshani, Mark E Cinque, Peter O'Halloran, Kenneth Softness, Laura Keeling, J Ryan Macdonell
Common upper extremity injuries in resistance training athletes include muscle strains, ligament sprains, pectoralis major tendon ruptures, distal biceps tendon ruptures, and chronic shoulder pain and capsulolabral injuries. While each injury is unique in its specific anatomic location and mechanism, each is preventable with proper exercise technique, safety and maintenance of muscle balance. Conservative treatment is the therapeutic modality of choice and these injuries generally resolve with workout modification, appropriate recovery, anti-inflammatory medication, and physical therapy...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29651858/sleep-related-issues-for-recovery-and-performance-in-athletes
#7
Sarah Kölling, Rob Duffield, Daniel Erlacher, Ranel Venter, Shona L Halson
The body of research that reports the relevance of sleep in high-performance sports is growing steadily. While the identification of sleep cycles and diagnosis of sleep disorders is limited to lab-based assessment via polysomnography, the development of activity-based devices estimating sleep patterns provides greater insight into the sleep behaviour of athletes in ecological settings. Overall, small sleep quantity and/or poor quality appears to exist in many athletic populations, though this may be related to training and competition context...
April 13, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29643999/sympatho-adrenergic-activation-by-endurance-exercise-effect-on-metanephrines-spillover-and-its-role-in-predicting-athlete-s-performance
#8
Elisa Danese, Cantor Tarperi, Gian Luca Salvagno, Alessandra Guzzo, Fabian Sanchis-Gomar, Luca Festa, Luciano Bertinato, Martina Montagnana, Federico Schena, Giuseppe Lippi
Background: The sympatho-adrenergic activation during exercise is implicated in many cardiovascular respiratory and metabolic adaptations which have been thought to partially explain the different levels of performance observed between trained and untrained subjects. To date, no evidence exists about the association between competition performance and markers of "acute stress response". We designed this study to investigate; (i) the acute sympatho-adrenergic activation during endurance exercise in recreational runners by measuring plasma levels of free metanephrine (MN) and normethanephrine (NMN) before and after a half-marathon run; (ii) the association between the metanephrines levels and the running time...
March 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29643814/impact-of-short-term-training-camp-on-aortic-blood-pressure-in-collegiate-endurance-runners
#9
Tsubasa Tomoto, Jun Sugawara, Ai Hirasawa, Tomoko Imai, Seiji Maeda, Shigehiko Ogoh
To investigate the influence of short-term vigorous endurance training on aortic blood pressure (BP), pulse wave analysis was performed in 36 highly trained elite collegiate endurance runners before and after a 7-day intense training camp. Subjects participated three training sessions per day, which mainly consisted of long distance running and sprint training to reach the daily target distance of 26 km. After the camp, they were divided into two groups based on whether the target training was achieved. Aortic systolic BP, pulse pressure, and tension-time index (TTI, a surrogate index of the myocardial oxygen demand) were significantly elevated after the camp in the accomplished group but not in the unaccomplished group, whereas the brachial BP remained unchanged in both groups...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29629620/differential-training-loads-and-individual-fitness-responses-to-pre-season-in-professional-rugby-union-players
#10
Shaun J McLaren, Andrew Smith, Jonathan D Bartlett, Iain R Spears, Matthew Weston
We aimed to compare differentiated training loads (TL) between fitness responders and non-responders to an eight-week pre-season training period in a squad of thirty-five professional rugby union players. Differential TL were calculated by multiplying player's perceptions of breathlessness (sRPE-B) and leg muscle exertion (sRPE-L) with training duration for each completed session. Performance-based fitness measures included the Yo-Yo Intermittent Recovery Test Level 1 (YYIRTL1), 10-, 20-, and 30-m linear sprint times, countermovement jump height (CMJ) and predicted one-repetition maximum back squat (P1RM Squat)...
April 9, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29629563/changes-in-collegiate-ice-hockey-player-anthropometrics-and-aerobic-fitness-over-three-decades
#11
Ashley N Triplett, Amy C Ebbing, Matthew R Green, Christopher P Connolly, David P Carrier, James M Pivarnik
Over the past several decades, an increased emphasis on fitness training has emerged among collegiate ice hockey teams, with the objective to improve on-ice performance. However, it is unknown if this increase in training has translated over time to changes in anthropometric and fitness profiles of collegiate ice hockey players. The purposes of this study were to describe anthropometric (height, weight, BMI, %fat) and aerobic fitness (VO<sub>2peak</sub>) characteristics of collegiate ice hockey players over 36 years, and to evaluate whether these characteristics differ between player positions...
April 9, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29628898/postactivation-potentiation-of-the-plantar-flexors-does-not-directly-translate-to-jump-performance-in-female-elite-young-soccer-players
#12
Olaf Prieske, Nicola A Maffiuletti, Urs Granacher
High-intensity muscle actions have the potential to temporarily improve muscle contractile properties (i.e., postactivation potentiation, PAP) thereby inducing acute performance enhancements. There is evidence that balance training can improve performance during strength exercises. Taking these findings together, the purpose of this study was to examine the acute effects of a combined balance and strength (B+S) exercise vs. a strength only (S) exercise on twitch contractile properties, maximum voluntary strength, and jump performance in young athletes...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29628891/training-load-immune-status-and-clinical-outcomes-in-young-athletes-a-controlled-prospective-longitudinal-study
#13
Katharina Blume, Nina Körber, Dieter Hoffmann, Bernd Wolfarth
Introduction: Beside positive effects on athlete's health, competitive sport can be linked with an increased risk of illness and injury. Because of high relative increases in training, additional physical and psychological strains, and an earlier specialization and professionalization, adolescent athletes needs an increased attention. Training can alter the immune system by inducing a temporary immunosuppression, finally developing infection symptoms. Previous studies identified Epstein Barr Virus (EBV) as potential indicator for the immune status...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29627088/athletes-with-brain-injury-pathophysiologic-and-medical-challenges
#14
REVIEW
Phoebe Runciman, Wayne Derman
Participation in elite sporting activities is becoming increasingly popular for individuals with brain injury. This article outlines the types of brain injury and the associated movement dysfunctions. In addition, specific pathophysiologic and medical challenges facing athletes with brain injury are discussed. Further research conducted using athletes with brain injury will add to the existing literature indicating the benefits of athletic training in this population. Increased scientific study within this area stands to further improve understanding of the complex interaction between neuromuscular impairment and athletic performance...
May 2018: Physical Medicine and Rehabilitation Clinics of North America
https://www.readbyqxmd.com/read/29626614/effects-of-whole-body-vibration-on-tibia-strength-and-structure-of-competitive-adolescent-swimmers-a-randomized-controlled-trial
#15
Alejandro Gómez-Bruton, Alejandro González-Agüero, Angel Matute-Llorente, Cristina Julián, Gabriel Lozano-Berges, Alba Gómez-Cabello, Nuria Garatachea, Jose A Casajús, German Vicente-Rodríguez
BACKGROUND: Swimming has no effect on bone mass or structure. Therefore, adolescent swimmers present similar bone strength values when compared to normo-active controls, and lower values when compared to weight-bearing athletes. It thus seems necessary to try to improve bone structure and strength of adolescent swimmers through a weight-bearing intervention in order to reduce the risk of suffering osteoporosis later in life. OBJECTIVE: To evaluate the effects of a 6-month WBV intervention on bone strength and structure of adolescent swimmers...
April 4, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29623052/the-relationship-between-range-of-motion-and-injuries-in-adolescent-dancers-and-sportspersons-a-systematic-review
#16
Joyce M Storm, Roger Wolman, Eric W P Bakker, Matthew A Wyon
Background: The frequent and intensive training and performance of pre-professional ballet dancers and sportspersons is offered at a time when young ballet dancers and young athletes may be vulnerable to injury due to the progress through adolescence and growth spurts. Hypothesis: There are changes in range of motion during the progress through adolescence and growth periods in dancers and sportspersons. These changes in ROM can be linked to the increase of injury. Objectives: The primary aim of this systematic review is to determine whether there are changes in ROM during the progress through adolescence and growth spurts in dancers and sportspersons...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29623049/specific-changes-in-young-soccer-player-s-fitness-after-traditional-bilateral-vs-unilateral-combined-strength-and-plyometric-training
#17
Rodrigo Ramirez-Campillo, Javier Sanchez-Sanchez, Oliver Gonzalo-Skok, Alejandro Rodríguez-Fernandez, Manuel Carretero, Fabio Y Nakamura
The aim of this study was to compare changes in young soccer player's fitness after traditional bilateral vs. unilateral combined plyometric and strength training. Male athletes were randomly divided in two groups; both received the same training, including strength training for knee extensors and flexors, in addition to horizontal plyometric training drills. The only difference between groups was the mode of drills technique: unilateral (UG; n = 9; age, 17.3 ± 1.1 years) vs. bilateral (TG; n = 9; age, 17...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29621810/-secondary-full-title-effects-of-high-intensity-interval-training-in-plain-and-uphill-regarding-physical-performance
#18
Natalie Marterer, Verena Menz, Martin Burtscher
BACKGROUND:  As the number of HIITs is increasing in competitive and non-competitive sports, the risk of injuries and overload is increasing. There are no scientific data to support specific recommendations in regard to intensity, duration, number of intervals and gradient for HIIT that result in improved muscular parameters in athletes. Therefore the aim of this study was to compare HIIT in plain and uphill exercise, with respect to exercise tolerance and improvements in performance (VO2max and 800 m running time in the plain and uphill)...
April 5, 2018: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/29619799/low-carbohydrate-ketogenic-diet-impairs-anaerobic-exercise-performance-in-exercise-trained-women-and-men-a-randomized-sequence-crossover-trial
#19
Kymberly A Wroble, Morgan N Trott, George G Schweitzer, Rabia S Rahman, Patrick V Kelly, Edward P Weiss
BACKGROUND: Low-carbohydrate, ketogenic diets cause mild, sub-clinical systemic acidosis. Anaerobic exercise performance is limited by acidosis. Therefore, we evaluated the hypothesis that a low-carbohydrate, ketogenic diet impairs anaerobic exercise performance, as compared to a high-carbohydrate diet. METHODS: Sixteen men and women (BMI, 23±1 kg/m2, age 23±1 yr) participated in a randomized-sequence, counterbalanced crossover study in which they underwent exercise testing after four days of either a low-carbohydrate, ketogenic diet (LC; <50 g/day and <10% of energy from carbohydrates) or a high-carbohydrate diet (HC; 6-10 g/kg/day carbohydrate)...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29618981/influence-of-endurance-training-during-childhood-on-total-hemoglobin-mass
#20
Nicole Prommer, Nadine Wachsmuth, Ina Thieme, Christian Wachsmuth, Erica M Mancera-Soto, Andreas Hohmann, Walter F J Schmidt
Elite endurance athletes are characterized by markedly increased hemoglobin mass (Hbmass). It has been hypothesized that this adaptation may occur as a response to training at a very young age. Therefore, the aim of this study was to monitor changes in Hbmass in children aged 8-14 years following systematic endurance training. In the first study, Hbmass, VO2max, and lean body mass (LBM) were measured in 17 endurance-trained children (13 boys and 4 girls; aged 9.7 ± 1.3 years; training history 1.5±1.8 years; training volume 3...
2018: Frontiers in Physiology
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