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https://www.readbyqxmd.com/read/29351161/effects-of-contrast-strength-vs-plyometric-training-on-lower-limb-explosive-performance-ability-to-change-direction-and-neuromuscular-adaptation-in-soccer-players
#1
Mehrez Hammami, Nawel Gaamouri, Roy J Shephard, Mohamed Souhaiel Chelly
The aim was to compare the effects of two differing 8-week in-season strength training programs (contrast strength training [CST] vs. plyometric training [PT]) on selected performance tests (5 and 40m sprints, S 4 X 5 m change of direction test, squat (SJ) and countermovement (CMJ) jumps , leg peak power on a cycle ergometer force-velocity test, 1-repetition maximal (1-RM) half squat, and electromyographic [EMG] activity of the vastus lateralis, vastus medialis and rectus femoris muscles during vertical jump tests)...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29343237/subtypes-in-clinical-burnout-patients-enrolled-in-an-employee-rehabilitation-program-differences-in-burnout-profiles-depression-and-recovery-resources-stress-balance
#2
Kathrin Bauernhofer, Daniela Bassa, Markus Canazei, Paulino Jiménez, Manuela Paechter, Ilona Papousek, Andreas Fink, Elisabeth M Weiss
BACKGROUND: Burnout is generally perceived a unified disorder with homogeneous symptomatology across people (exhaustion, cynicism, and reduced professional efficacy). However, increasing evidence points to intra-individual patterns of burnout symptoms in non-clinical samples such as students, athletes, healthy, and burned-out employees. Different burnout subtypes might therefore exist. Yet, burnout subtypes based on burnout profiles have hardly been explored in clinical patients, and the samples investigated in previous studies were rather heterogeneous including patients with various physical, psychological, and social limitations, symptoms, and disabilities...
January 17, 2018: BMC Psychiatry
https://www.readbyqxmd.com/read/29342097/time-domain-near-infrared-spectroscopy-device-for-monitoring-muscle-oxidative-metabolism-custom-probe-and-in-vivo-applications
#3
Rebecca Re, Ileana Pirovano, Davide Contini, Lorenzo Spinelli, Alessandro Torricelli
Measurement of muscle oxidative metabolism is of interest for monitoring the training status in athletes and the rehabilitation process in patients. Time domain near infrared spectroscopy (TD NIRS) is an optical technique that allows the non-invasive measurement of the hemodynamic parameters in muscular tissue: concentrations of oxy- and deoxy-hemoglobin, total hemoglobin content, and tissue oxygen saturation. In this paper, we present a novel TD NIRS medical device for muscle oxidative metabolism. A custom-printed 3D probe, able to host optical elements for signal acquisition from muscle, was develop for TD NIRS in vivo measurements...
January 17, 2018: Sensors
https://www.readbyqxmd.com/read/29340002/performance-changes-of-elite-paralympic-judo-athletes-during-a-paralympic-games-cycle-a-case-study-with-the-brazilian-national-team
#4
Irineu Loturco, Lucas A Pereira, Ciro Winckler, Jaime R Bragança, Roger A da Fonseca, Ronaldo Kobal, Cesar C Cal Abad, Katia Kitamura, Fabio Y Nakamura, Emerson Franchini
The aim of this study was to describe the variations in power performance of elite Paralympic judo athletes across three consecutive training cycles of preparation for the ParaPan American Games, the World Championship and the Paralympic Games. Eleven Paralympic judokas from the Brazilian National team participated in this study. They were repeatedly assessed using squat and countermovement jumps, mean propulsive power (MPP) in the jump-squat (JS), the bench press and prone bench pull at several moments of the preparation...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339998/planning-training-loads-for-the-400-m-hurdles-in-three-month-mesocycles-using-artificial-neural-networks
#5
Krzysztof Przednowek, Janusz Iskra, Krzysztof Wiktorowicz, Tomasz Krzeszowski, Adam Maszczyk
This paper presents a novel approach to planning training loads in hurdling using artificial neural networks. The neural models performed the task of generating loads for athletes' training for the 400 meters hurdles. All the models were calculated based on the training data of 21 Polish National Team hurdlers, aged 22.25 ± 1.96, competing between 1989 and 2012. The analysis included 144 training plans that represented different stages in the annual training cycle. The main contribution of this paper is to develop neural models for planning training loads for the entire career of a typical hurdler...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29324186/impact-of-sodium-citrate-ingestion-during-recovery-after-dehydrating-exercise-on-rehydration-and-subsequent-40-km-cycling-time-trial-performance-in-the-heat
#6
Silva Suvi, Martin Mooses, Saima Timpmann, Luule Medijainen, Daria Narõškina, Eve Unt, Vahur Ööpik
The purpose of this study was to assess the impact of sodium citrate (CIT) ingestion (600 mg·kg<sup>‒1</sup>) during recovery from dehydrating cycling exercise (DE) on subsequent 40-km cycling performance in a warm environment (32 °C). Twenty male non-heat-acclimated endurance athletes exercised in the heat until 4% body mass (BM) loss occurred. After 16 h recovery with consumption of water ad libitum and prescribed diet (evening meal 20 kcal·kg<sup>‒1</sup>, breakfast 12 kcal·kg<sup>‒1</sup>) supplemented in a double-blind, randomized, crossover manner with CIT or placebo (PLC), they performed 40-km time-trial (TT) on a cycle ergometer in a warm environment...
January 11, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29313111/long-term-swimming-training-modifies-acute-immune-cell-response-to-a-high-intensity-session
#7
José P Morgado, Cristina P Monteiro, Catarina N Matias, Joana F Reis, Júlia Teles, Maria José Laires, Francisco Alves
PURPOSE: Long-term training influence on athletes' immune cell response to acute exercise has been poorly studied, despite the complexity of both chronic and acute adaptations induced by training. The purpose of the study is to study the influence of a 4-month swimming training cycle on the immune cell response to a high-intensity training session, during 24 h of recovery, considering sex, maturity, and age group. METHODS: Forty-three swimmers (16 females, 14.4 ± 1...
January 8, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29310699/planning-a-sports-training-program-using-adaptive-particle-swarm-optimization-with-emphasis-on-physiological-constraints
#8
Nattapon Kumyaito, Preecha Yupapin, Kreangsak Tamee
OBJECTIVE: An effective training plan is an important factor in sports training to enhance athletic performance. A poorly considered training plan may result in injury to the athlete, and overtraining. Good training plans normally require expert input, which may have a cost too great for many athletes, particularly amateur athletes. The objectives of this research were to create a practical cycling training plan that substantially improves athletic performance while satisfying essential physiological constraints...
January 8, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29308847/comprehensive-overview-of-haemoglobin-mass-and-blood-volume-in-elite-athletes-across-a-wide-range-of-different-sporting-disciplines
#9
Irina Zelenkova, Sergey Zotkin, Pavel Korneev, Sergey Koprov, Alexandr Grushin
BACKGROUND: Comparison of total haemoglobin mass (tHb-mass) and blood volume (BV) across elite athletes different sporting specialisations. METHODS: 222 members of Russian national teams from 12 different disciplines and non Olympic competitive season for tHb-mass, BV, plasma volume (PV), haemoglobin concentration (Hb), and hematocrit level (Hct) determination. tHb-mass measurements were performed using CO-rebreathing technique, alongside Hb and Hct (capillary blood)...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29305667/a-pilot-study-comparing-the-metabolic-profiles-of-elite-level-athletes-from-different-sporting-disciplines
#10
Fatima Al-Khelaifi, Ilhame Diboun, Francesco Donati, Francesco Botrè, Mohammed Alsayrafi, Costas Georgakopoulos, Karsten Suhre, Noha A Yousri, Mohamed A Elrayess
BACKGROUND: The outstanding performance of an elite athlete might be associated with changes in their blood metabolic profile. The aims of this study were to compare the blood metabolic profiles between moderate- and high-power and endurance elite athletes and to identify the potential metabolic pathways underlying these differences. METHODS: Metabolic profiling of serum samples from 191 elite athletes from different sports disciplines (121 high- and 70 moderate-endurance athletes, including 44 high- and 144 moderate-power athletes), who participated in national or international sports events and tested negative for doping abuse at anti-doping laboratories, was performed using non-targeted metabolomics-based mass spectroscopy combined with ultrahigh-performance liquid chromatography...
January 5, 2018: Sports Medicine—Open
https://www.readbyqxmd.com/read/29284243/lower-extremity-and-spine-pain-in-cyclists
#11
Sylwia Ewa Piotrowska, Marian Majchrzycki, Piotr Rogala, Martyna Mazurek-Sitarz
INTRODUCTION: The number of cyclists increases each year. Some people treat cycling as a passion and practice it at every possible occasion, while for others it is a mean of transport or a form of relaxation at the weekend. However, very few people realize that cycling can also have a negative impact on their health. OBJECTIVE: To assess the prevalence of lower extremity and spine pain in cyclists, and evaluate the influence of various factors causing it. MATERIAL AND METHODS: The study was performed on 167 subjects during amateur cycling competitions in the Greater Poland and Kuyavian-Pomeranian Provinces...
December 23, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/29282696/cardiac-biomarkers-release-in-preadolescent-athletes-after-an-high-intensity-exercise
#12
A Peretti, L Mauri, A Masarin, G Annoni, A Corato, A Maloberti, Cristina Giannattasio, G Vignati
INTRODUCTION: An elevation of cardiac troponins has been described in healthy athletes after endurance exercises. The clinical significance of this increase is unclear and the lack of awareness of this phenomenon may lead to inappropriate management of these subjects. AIM: We sought to determine wether an intensive cycling training could determine a biomarkers elevation. METHODS: We evaluated serum high sensitivity cardiac troponin T, NH(2)-terminal pro-brain natriuretic peptide, CK-MB and CK in 21 healthy male preadolescent athletes (age 9...
December 27, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/29280410/iron-balance-and-iron-supplementation-for-the-female-athlete-a-practical-approach
#13
Charles R Pedlar, Carlo Brugnara, Georgie Bruinvels, Richard Burden
Maintaining a positive iron balance is essential for female athletes to avoid the effects of iron deficiency and anaemia and to maintain or improve performance. A major function of iron is in the production of the oxygen and carbon dioxide carrying molecule, haemoglobin, via erythropoiesis. Iron balance is under the control of a number of factors including the peptide hormone hepcidin, dietary iron intake and absorption, environmental stressors (e.g. altitude), exercise, menstrual blood loss and genetics. Menstruating females, particularly those with heavy menstrual bleeding are at an elevated risk of iron deficiency...
December 27, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29248656/myocardial-fibrosis-in-competitive-triathletes-detected-by-contrast-enhanced-cmr-correlates-with%C3%A2-exercise-induced-hypertension-and%C3%A2-competition-history
#14
Enver Tahir, Jitka Starekova, Kai Muellerleile, Alexandra von Stritzky, Julia Münch, Maxim Avanesov, Julius M Weinrich, Christian Stehning, Sebastian Bohnen, Ulf K Radunski, Eric Freiwald, Stefan Blankenberg, Gerhard Adam, Axel Pressler, Monica Patten, Gunnar K Lund
OBJECTIVES: This study analyzed the presence of myocardial fibrosis detected by late gadolinium-enhancement (LGE) cardiac magnetic resonance (CMR) in correlation with the performance of competitive triathletes objectified by an exercise test and individual competition history. BACKGROUND: Myocardial fibrosis detected by LGE CMR has been reported to occur in 0% to 50% of asymptomatic athletes. However, the cause and mechanisms of myocardial fibrosis are unclear. METHODS: Eighty-three asymptomatic triathletes undergoing >10 training h per week (43 ± 10 years of age; 65% male) and 36 sedentary controls were studied by using LGE and extracellular volume (ECV) CMR...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248350/effectiveness-of-kinesiology-tape-on-sports-performance-abilities-in-athletes-a-systematic-review
#15
REVIEW
Jennifer C Reneker, Lisa Latham, Ryan McGlawn, Matthew R Reneker
OBJECTIVE: Establish the effectiveness of kinesiology tape (KT) on sports performance abilities compared to that of other tapes or no tape with consideration to the application methodology, timeframe, and outcome measurement. METHODS: PubMed, Embase, and PEDro databases were systematically searched. The following inclusion criteria were applied: 1) participants were healthy athletes, 2) compared any brand of dynamic KT to other types of tape (sham or therapeutic) and/or no tape, 3) measured some construct of functional sports performance, 4) involved randomization...
October 9, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29239986/practical-model-of-low-volume-paddling-based-sprint-interval-training-improves-aerobic-and-anaerobic-performances-in-professional-female-canoe-polo-athletes
#16
Mohsen Sheykhlouvand, Erfan Khalili, Mohammadali Gharaat, Hamid Arazi, Mousa Khalafi, Bahman Tarverdizadeh
Brief, intense exercise training employing running and cycling as exercise interventions may induce aerobic and anaerobic adaptations in athletes from wide range of sports. However, this has not been studied extensively for those sports in which the upper-body is predominantly involved. Our purpose was to examine the effects of kayak paddling-based sprint interval training (SIT) on cardiorespiratory fitness and anaerobic performance. 16 professional female canoe polo athletes (age = 27.6 ± 1.9 years; height = 165...
December 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29222948/force-coordination-strategies-in-on-water-single-sculling-are-asymmetries-related-to-better-rowing-performance
#17
John Warmenhoven, Richard Smith, Conny Draper, Andrew Harrison, Norma Bargary, Stephen Cobley
Asymmetries of the rowing stroke cycle have been assessed with reference to kinematics and foot-force measures in laboratory testing environments. It remains unclear how asymmetries in propulsive kinetic measures are related to on-water rowing performance. A new approach for the evaluation of both global and local asymmetries across the entire movement was used to assess the continuous role of asymmetries and whether these change according to level of competitive representation. Twenty seven highly skilled female rowers (national and international competition level), rowing at 32 strokes per minute in a single scull boat were evaluated...
December 9, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29189587/the-effect-of-cold-14-%C3%A2-c-versus-ice-5%C3%A2-c-water-immersion-on-recovery-from-intermittent-running-exercise
#18
Daniel Anderson, James Nunn, Christopher J Tyler
The purpose was to compare 14°C (CWI14°C) and 5°C (CWI5°C) cold water immersion following intermittent running. On three occasions, nine male team-sport players undertook 12 min of CWI14°C, CWI5°C or non-immersed seated recovery (CON) following 45 min of intermittent running exercise. Maximal cycling performance and markers of recovery were measured before and in the 0 - 72 h after exercise. Peak power output (PPO) was immediately reduced following all interventions (d = 1.8). CWI5°C was more effective at restoring PPO than CWI14°C (d = 0...
November 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29182403/long-distance-triathletes-intentions-to-manipulate-energy-and-macronutrient-intake-over-a-training-macrocycle
#19
Hani Kopetschny, David Rowlands, David Popovich, Jasmine Thomson
This study explored the information sources long-distance triathletes used to inform their training and nutrition plans, and evaluated these plans over a training macrocycle. Seventy-four long-distance triathletes completed the online survey. Coaches were the most popular training information source (69%), whereas non-professional sources (internet 65%, other athletes 53%) were more popular than nutritionists (29%) for nutrition information. Attributes valued most in an information source were: source prior personal experience, individualised advice, breadth of knowledge, and credibility...
November 28, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29163232/considerations-on-the-assessment-and-use-of-cycling-performance-metrics-and-their-integration-in-the-athlete-s-biological-passport
#20
Paolo Menaspà, Chris R Abbiss
Over the past few decades the possibility to capture real-time data from road cyclists has drastically improved. Given the increasing pressure for improved transparency and openness, there has been an increase in publication of cyclists' physiological and performance data. Recently, it has been suggested that the use of such performance biometrics may be used to strengthen the sensitivity and applicability of the Athlete Biological Passport (ABP) and aid in the fight against doping. This is an interesting concept which has merit, although there are several important factors that need to be considered...
2017: Frontiers in Physiology
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