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Athlete, monitoring performance

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https://www.readbyqxmd.com/read/29783763/integrated-framework-of-load-monitoring-by-a-combination-of-smartphone-applications-wearables-and-point-of-care-testing-provides-feedback-that-allows-individual-responsive-adjustments-to-activities-of-daily-living
#1
Peter Düking, Silvia Achtzehn, Hans-Christer Holmberg, Billy Sperlich
Athletes schedule their training and recovery in periods, often utilizing a pre-defined strategy. To avoid underperformance and/or compromised health, the external load during training should take into account the individual's physiological and perceptual responses. No single variable provides an adequate basis for planning, but continuous monitoring of a combination of several indicators of internal and external load during training, recovery and off-training as well may allow individual responsive adjustments of a training program in an effective manner...
May 19, 2018: Sensors
https://www.readbyqxmd.com/read/29760574/seasonal-variations-in-body-composition-maximal-oxygen-uptake-and-gas-exchange-threshold-in-cross-country-skiers
#2
Metin Polat, Selcen Korkmaz Eryılmaz, Sami Aydoğan
Introduction: In order to ensure that athletes achieve their highest performance levels during competitive seasons, monitoring their long-term performance data is crucial for understanding the impact of ongoing training programs and evaluating training strategies. The present study was thus designed to investigate the variations in body composition, maximal oxygen uptake (VO2max ), and gas exchange threshold values of cross-country skiers across training phases throughout a season. Materials and methods: In total, 15 athletes who participate in international cross-country ski competitions voluntarily took part in this study...
2018: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29745773/muscle-oxygenation-rather-than-vo-2-max-is-a-strong-predictor-of-performance-in-sprint-canoe-kayak
#3
Myriam Paquette, François Bieuzen, François Billaut
PURPOSE: This study aimed to characterize the relationships between muscle oxygenation and performance during on- and off-water tests in highly trained sprint canoe-kayak athletes. METHODS: Thirty athletes (19 kayakers and 11 canoeists) performed a maximal incremental test on a canoe or kayak ergometer for determination of VO2max and examination of the relation between peak power output (PPO) and physiological parameters. A subset of 21 athletes also performed a 200-m and a 500-m (for women) or 1000-m (for men) on-water time trials...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745735/time-trial-performance-in-elite-speed-skaters-after-remote-ischemic-preconditioning
#4
Philippe Richard, François Billaut
PURPOSE: Speed skating leads to blood-flow restriction and deoxygenation in the lower limbs (especially the right leg) that may affect performance. Although the acute influence of such deoxygenation is not clearly understood, we tested whether remote ischemic preconditioning (RIPC) could modify muscular oxygenation and improve time-trial performance in that sport. METHODS: Using a randomized, single-blind, placebo-controlled, crossover design, 9 elite speed skaters performed 1000-m on-ice time-trials preceded by either RIPC of the upper limbs (3x5-min compression/5-min reperfusion cycles at 30 mmHg > arterial systolic pressure) or SHAM (10 mmHg)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29740559/comparison-of-special-judo-fitness-test-and-dynamic-and-isometric-judo-chin-up-tests-performance-and-classificatory-tables-development-for-cadet-and-junior-athletes
#5
Marcus Fábio Agostinho, José Alfredo Olivio Junior, Nemanja Stankovic, Raquel Escobar-Molina, Emerson Franchini
The aims of this work were to compare the performances of male and female cadet and junior judo athletes and to develop classificatory tables to these judo-specific tests for international-level from these ages. Data collected during training camps of male and female cadet and junior judo teams from three nations (Brazil, Serbia, and Spain) were analyzed, totalizing 252 individual results of special judo fitness test (SJFT), and 222 and 208 of dynamic and isometric judogi chin-up tests, respectively. Juniors performed better than cadets in the SJFT, with higher number of throws in A, B, C, and total ( P <0...
April 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29738680/autologous-osteochondral-mosaicplasty-for-centrally-and-laterally-located-advanced-capitellar-osteochondritis-dissecans-in-teenage-athletes-clinical-outcomes-radiography-and-magnetic-resonance-imaging-findings
#6
Tadanao Funakoshi, Daisuke Momma, Yuki Matsui, Tamotsu Kamishima, Yuichiro Matsui, Daisuke Kawamura, Yusuke Nagano, Norimasa Iwasaki
BACKGROUND: Autologous osteochondral mosaicplasty (ie, mosaicplasty) results in satisfactory clinical outcomes and reliable return to play for patients with large or unstable lesions due to osteochondritis dissecans (OCD) of the humeral capitellum. However, the association between the healing of the reconstructed cartilage and clinical outcomes remains unclear. PURPOSE: To evaluate the efficacy of mosaicplasty in teenage athletes through use of clinical scores and imaging...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29733264/head-impacts-and-cognitive-performance-in-men-s-lacrosse
#7
Erin Renee Marchesseault, Daniel Nguyen, Lee Spahr, Caroline Beals, Brian Razak, John M Rosene
OBJECTIVES: The purpose of this investigation was to record head impacts and assess cognitive function throughout a NCAA Division III men's lacrosse season. METHODS: Fifteen NCAA Div III men's lacrosse players (age = 21.1 ± 1.5 years; height = 179 ± 7.00cm; weight = 80.74 ± 8.00kg) wore Smart Impact Monitors (SIM) (Triax Technologies, Inc., Norwalk, CT) within headbands, in 28 practices and 9 home games of one season. The SIM devices communicated with the Triax Technologies SKYi, which confirmed activated SIMs and obtained data of linear acceleration, rotational acceleration, rotational velocity, direction, and location of each head impact...
May 7, 2018: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/29726698/on-the-use-of-wearable-physiological-monitors-to-assess-heat-strain-during-occupational-heat-stress
#8
Sean R Notley, Andreas D Flouris, Glen P Kenny
Workers in many industries are required to perform arduous work in high heat stress conditions, which can lead to rapid increases in body temperature that elevate the risk of heat-related illness or even death. Traditionally, effort to mitigate work-related heat injury has been directed to the assessment of environmental heat stress (e.g., wet-bulb globe temperature), rather than the associated physiological strain responses (e.g., heart rate, skin and core temperatures). However, since a workers physiological response to a given heat stress is modified independently by inter-individual factors (e...
May 4, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29707541/personalized-hydration-strategy-attenuates-the-rise-in-heart-rate-and-in-skin-temperature-without-altering-cycling-capacity-in-the-heat
#9
Denise de Melo-Marins, Ana Angélica Souza-Silva, Gabriel Lucas Leite da Silva-Santos, Francisco de Assis Freire-Júnior, Jason Kai Wei Lee, Orlando Laitano
The optimal hydration plan [i.e., drink to thirst, ad libitum (ADL), or personalized plan] to be adopted during exercise in recreational athletes has recently been a matter of debate and, due to conflicting results, consensus does not exist. In the present investigation, we tested whether a personalized hydration strategy based on sweat rate would affect cardiovascular and thermoregulatory responses and exercise capacity in the heat. Eleven recreational male cyclists underwent two familiarization cycling sessions in the heat (34°C, 40% RH) where sweat rate was also determined...
2018: Frontiers in Nutrition
https://www.readbyqxmd.com/read/29701123/cardiodynamicsgram-a-novel-tool-for-monitoring-cardiac-function-in-exercise-training
#10
Xu Wen, Bokai Guo, Yinglan Gong, Ling Xia, Jie Yu
This study evaluated the feasibility of cardiodynamicsgram (CDG) for monitoring the cardiac functions of athletes and exercisers. CDG could provide an effective, simple, and economical tool for exercise training. Seventeen middle-distance race athletes aged 14-28 years old were recruited. CDG tests and blood test including creatine kinase (CK), CK-MB isoenzyme, and high-sensitivity troponin I (hsTnI) were performed before a high-intensity prolonged training, as well as 2 and 14 h after training, respectively...
April 27, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29686813/resting-sympatho-vagal-balance-is-related-to-10-km-running-performance-in-master-endurance-athletes
#11
Angelo Cataldo, Antonino Bianco, Antonio Paoli, Dario Cerasola, Saverio Alagna, Giuseppe Messina, Daniele Zangla, Marcello Traina
Relationships between heart rate recovery after exercise (HRR, baseline heart rate variability measures (HRV), and time to perform a 10Km running trial (t10Km) were evaluated in "master" athletes of endurance to assess whether the measured indexes may be useful for monitoring the training status of the athletes. Ten "master" athletes of endurance, aged 40-60 years, were recruited. After baseline measures of HRV, the athletes performed a graded maximal test on treadmill and HRR was measured at 1 and 2 minutes from recovery...
January 12, 2018: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29685827/test-design-and-individual-analysis-in-wheelchair-rugby
#12
David S Haydon, Ross A Pinder, Paul N Grimshaw, William S P Robertson
OBJECTIVES: Use a task vehicle of sprint testing in wheelchair rugby (WCR) to explore the impact of small changes to test design using both group and individual analysis. DESIGN: Exploratory, repeated measures, on-court study METHOD: 25 national or international level wheelchair rugby players completed 5×5m sprints under two conditions: (i) an acceleration from standstill in their own time, and (ii) an 'active' start, simulating a key aspect of performance. Video analysis and accelerometer data were used to measure key kinematic and performance variables with a focus on the first three strokes...
April 7, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29666559/assessing-performance-in-pre-season-wrestling-athletes-using-biomarkers
#13
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/29651858/sleep-related-issues-for-recovery-and-performance-in-athletes
#14
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/29651247/application-of-the-athlete-s-performance-passport-for-doping-control-a-case-report
#15
Sergei Iljukov, Stephane Bermon, Yorck O Schumacher
The efficient use of testing resources is a key issue in the fight against doping. The longitudinal tracking of sporting performances to identify unusual improvements possibly caused by doping, so-called "athlete's performance passport" (APP) is a new concept to improve targeted anti-doping testing. In fact, unusual performances by an athlete would trigger a more thorough testing program. In the present case report, performance data is modeled using the critical power concept for a group of athletes based on their past performances...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29648933/influence-of-body-position-on-shoulder-and-trunk-muscle-activation-during-resisted-isometric-shoulder-external-rotation
#16
David A Krause, Lucas G Dueffert, Jaclyn L Postma, Eric T Vogler, Amy J Walsh, John H Hollman
BACKGROUND: External rotation (ER) strengthening of the shoulder is an integral component of rehabilitative and preventative programs for overhead athletes. A variety of shoulder ER strengthening exercises are reported, including those intended to integrate the core musculature. The purpose of this study was to examine ER torque and electromyographic (EMG) activation of shoulder and trunk muscles while performing resisted isometric shoulder ER in 3 positions (standing, side lying, and side plank)...
April 1, 2018: Sports Health
https://www.readbyqxmd.com/read/29618981/influence-of-endurance-training-during-childhood-on-total-hemoglobin-mass
#17
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
https://www.readbyqxmd.com/read/29611324/validation-of-a-novel-wearable-wireless-technology-to-estimate-oxygen-levels-and-lactate-threshold-power-in-the-exercising-muscle
#18
Parisa Farzam, Zack Starkweather, Maria A Franceschini
There is a growing interest in monitoring muscle oxygen saturation (SmO2 ), which is a localized measure of muscle oxidative metabolism and can be acquired continuously and noninvasively using near-infrared spectroscopy (NIRS) methods. Most NIRS systems are cumbersome, expensive, fiber coupled devices, with use limited to lab settings. A novel, low cost, wireless, wearable has been developed for use in athletic training. In this study, we evaluate the advantages and limitations of this new simple continuous-wave (CW) NIRS device with respect to a benchtop, frequency-domain near-infrared spectroscopy (FDNIRS) system...
April 2018: Physiological Reports
https://www.readbyqxmd.com/read/29599870/effect-of-two-different-types-of-olympic-rotation-order-on-cardiovascular-and-metabolic-variables-in-men-s-artistic-gymnastics
#19
Bessem Mkaouer, Monèm Jemni, Helmi Chaabene, Samiha Amara, Ahmad Njah, Mokhtar Chtara
The rotation sequence-order differs from a gymnast to another according to the draw at the time of the qualifying competitions in men's artistic gymnastics. Only the six best gymnasts start on the floor exercises, the others could start on any of the other five apparatuses. It has been demonstrated that some gymnastics events are physiologically less taxing than others; hence some gymnasts could experience lower and/or higher levels of cardiovascular and metabolic stress compared to others, depending on the apparatus they start with...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599725/validity-and-reliability-of-10-hz-global-positioning-system-to-assess-in-line-movement-and-change-of-direction
#20
Pantelis T Nikolaidis, Filipe M Clemente, Cornelis M I van der Linden, Thomas Rosemann, Beat Knechtle
The objectives of the present study were to examine the validity and reliability of the 10 Hz Johan GPS unit in assessing in-line movement and change of direction. The validity was tested against the criterion measure of 200 m track-and-field (track-and-field athletes, n = 8) and 20 m shuttle run endurance test (female soccer players, n = 20). Intra-unit and inter-unit reliability was tested by intra-class correlation coefficient (ICC) and coefficient of variation (CV), respectively. An analysis of variance examined differences between the GPS measurement and five laps of 200 m at 15 km/h, and t -test examined differences between the GPS measurement and 20 m shuttle run endurance test...
2018: Frontiers in Physiology
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