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https://www.readbyqxmd.com/read/27918673/predictive-indicators-of-overuse-injuries-in-adolescent-endurance-athletes
#1
Daniel Martínez-Silván, Jaime Díaz-Ocejo, Andrew Murray
PURPOSE: To analyse the influence of training exposure and the utility of self-report questionnaires on predicting overuse injuries in adolescent endurance athletes. METHODS: 5 adolescent male endurance athletes (15.7 ± 1.4 yr) from a full-time sports academy answered 2 questionnaires (Recovery Cue; RC-q & Oslo Sports Trauma Research questionnaire; OSTRC-q) on a weekly basis for one season (37 wks) in order to detect (1) signs of overtraining and under-recovery (RC-q) and (2) early symptoms of lower limb injuries (OSTRC-q)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918666/quantification-of-training-and-competition-loads-in-endurance-sports-methods-and-applications
#2
Iñigo Mujika
Training quantification is basic to evaluate an endurance athlete's responses to the training loads, ensure adequate stress/recovery balance and determine the relationship between training and performance. Quantifying both external and internal workload is important, because the external workload does not measure the biological stress imposed by the exercise sessions. Generally used quantification methods include retrospective questionnaires, diaries, direct observation and physiological monitoring, often based on the measurement of oxygen uptake, heart rate and blood lactate concentration...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918664/modern-techniques-and-technologies-applied-to-training-and-performance-monitoring
#3
William A Sands, Ashley A Kavanaugh, Steven R Murray, Jeni R McNeal, Monèm Jemni
Athlete preparation and performance continues to increase in complexity and costs. Modern coaches are shifting from reliance on personal memory, experience, and opinion to evidence from collected training load data. Training load monitoring may hold vital information for developing systems of monitoring that follow the training process with such precision that both performance prediction and day-to-day management of training become an adjunct to preparation and performance. Time series data collection and analyses in sport are still in their infancy with considerable efforts being applied in "big-data" analytics and models of the appropriate variables to monitor and methods for doing so...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918659/importance-of-various-training-load-measures-on-injury-incidence-of-professional-rugby-league-athletes
#4
Heidi R Thornton, Jace A Delaney, Grant M Duthie, Ben J Dascombe
PURPOSE: To investigate the ability of various internal and external training load (TL) monitoring measures to predict injury incidence amongst positional groups within professional rugby league athletes. METHODS: TL and injury data were collected across 3 seasons (2013-2015) from twenty-five players competing in the National Rugby League competition. Daily TL data were included in the analysis, including session rating of perceived exertion (sRPE-TL), total distance (TD), high-speed running distance (HSD; >5m·s(-1)) and high-metabolic power distance (HPD; >20 W·kg(-1))...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27909408/reliability-validity-and-usefulness-of-30-15-intermittent-fitness-test-in-female-soccer-players
#5
Nedim Čović, Eldin Jelešković, Haris Alić, Izet Rađo, Erduan Kafedžić, Goran Sporiš, Daniel T McMaster, Zoran Milanović
PURPOSE: The aim of this study was to examine the reliability, validity and usefulness of the 30-15IFT in competitive female soccer players. METHODS: Seventeen elite female soccer players participated in the study. A within subject test-retest study design was utilized to assess the reliability of the 30-15 intermittent fitness test (IFT). Seven days prior to 30-15IFT, subjects performed a continuous aerobic running test (CT) under laboratory conditions to assess the criterion validity of the 30-15IFT. End running velocity (VCT and VIFT), peak heart rate (HRpeak) and maximal oxygen consumption (VO2max) were collected and/or estimated for both tests...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27900186/injury-incidence-in-a-premier-league-youth-soccer-academy-using-the-consensus-statement-a-prospective-cohort-study
#6
Andrew Renshaw, Peter C Goodwin
BACKGROUND: There is an established risk of injury to young athletes exposed to high training loads. Identifying and monitoring injury risk is essential to aid prevention. The aim of this study was to use the consensus statement to determine the incidence and pattern of injury in 1 English Premier League soccer academy during 1 season. METHODS: A prospective cohort study included 181 elite academy soccer players during the 2012-2013 season. Players were divided into 5 age groups between 9 and 18 years...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27895662/muscle-enriched-micrornas-isolated-from-whole-blood-are-regulated-by-exercise-and-are-potential-biomarkers-of-cardiorespiratory-fitness
#7
Joshua Denham, Priscilla R Prestes
MicroRNAs (miRNAs) are small non-coding RNA molecules that regulate gene expression post-transcriptionally. Evidence indicating miRNAs influence exercise-induced health and performance adaptations is mounting. Circulating miRNAs are responsible for intercellular communication and could serve as biomarkers for disease and exercise-related traits. Such biomarkers would contribute to exercise screening, monitoring, and the development of personalized exercise prescription. Accordingly, we investigated the impact of long-term strenuous aerobic exercise training and a single bout of maximal aerobic exercise on five muscle-enriched miRNAs implicated in exercise adaptations (miR-1, miR-133a, miR-181a, miR-486, and miR-494)...
2016: Frontiers in Genetics
https://www.readbyqxmd.com/read/27857951/validation-of-an-ingestible-temperature-data-logging-and-telemetry-system-during-exercise-in-the-heat
#8
Gavin J S Travers, David S Nichols, Abdulaziz Farooq, Sébastien Racinais, Julien D Périard
Aim: Intestinal temperature telemetry systems are promising monitoring and research tools in athletes. However, the additional equipment that must be carried to continuously record temperature data limits their use to training. The purpose of this study was to assess the validity and reliability of a new gastrointestinal temperature data logging and telemetry system (e-Celsius™) during water bath experimentation and exercise trials. Materials and Methods: Temperature readings of 23 pairs of e-Celsius (TeC) and VitalSense (TVS) ingestible capsules were compared to rectal thermistor responses (Trec) at 35, 38...
April 2016: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/27834570/evolution-of-game-s-demands-from-young-to-elite-players-in-men-s-volleyball
#9
Antonio García-de-Alcaraz Serrano, David Valadés, José M Palao
PURPOSE: The purpose of this study was to assess the evolution of the game's demands throughout players' development in men's volleyball. METHODS: A total of 150 sets and 6.671 rallies were analysed. The sample was composed of 30 sets each by under-14, under-16, under-19, national senior, and international senior teams (1.291, 1.318, 1.310, 1.372 and 1.380 rallies for each category, respectively). Sets included in the sample were stratified and then randomly selected...
November 11, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27834559/wearable-training-monitoring-technology-applications-challenges-and-opportunities
#10
Marco Cardinale, Matthew C Varley
The need to quantify aspects of training in order to improve training prescription has been the holy grail of sport scientists and coaches for many years. Recently, there has been an increase in scientific interest, possibly due to technological advancements and better equipment to quantify training activities. Over the last few years there has been an increase in the number of studies assessing training load in various athletic cohorts with a bias towards subjective reports and/or quantifications of external load...
November 11, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27834554/subjective-fatigue-and-readiness-to-train-may-predict-functional-overreaching-after-only-3-days-of-cycling
#11
Twan Ten Haaf, Selma van Staveren, Erik Oudenhoven, Maria F Piacentini, Romain Meeusen, Bart Roelands, Leo Koenderman, Hein A M Daanen, Carl Foster, Jos J de Koning
PURPOSE: The aim of this study was to investigate whether monitoring of easily measurable stressors and symptoms can be used to early distinguish between acute fatigue (AF) and functional overreaching (FOR). METHODS: The study included 30 subjects (11 female/ 19 male, age: 40.8±10.8 y, VO2max: 51.8±6.3 ml/kg/min) who participated in an 8-day cycling event over 1,300 km with 18,500 climbing meters. Performance was measured before and after the event using a maximal incremental test...
November 11, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27834553/monitoring-what-matters-a-systematic-process-for-selecting-training-load-measures
#12
Sean Williams, Grant Trewartha, Matthew J Cross, Simon P T Kemp, Keith A Stokes
PURPOSE: Numerous derivative measures can be calculated from the simple session-Rating of Perceived Exertion (sRPE) tool for monitoring training loads (e.g., acute:chronic workload and cumulative loads). The challenge from a practitioner's perspective is to decide which measures they should calculate and monitor in their athletes for injury prevention purposes. The aim of the current study was to outline a systematic process of data reduction and variable selection for such training load measures...
November 11, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27803627/muscle-contraction-velocity-a-suitable-approach-to-analyze-the-functional-adaptations-in-elite-soccer-players
#13
Irineu Loturco, Lucas A Pereira, Ronaldo Kobal, Katia Kitamura, Rodrigo Ramírez-Campillo, Vinicius Zanetti, Cesar C Cal Abad, Fabio Y Nakamura
Tensiomyography (TMG) has been used as a simple and non-invasive tool to assess the mechanical properties of skeletal muscles. The TMG-derived velocity of contraction (Vc), which can be calculated from the ratio between maximal radial displacement and the sum of contraction time and delay time, has been proposed for evaluating athletes. However, its sensitivity to training effects and possible relation with changes in soccer players' neuromuscular performance have not yet been addressed. To test this possibility, twenty-two male Brazilian elite soccer players were assessed using TMG-derived Vc, unloaded squat jump, countermovement jump and drop jump at 45 cm, loaded jump squat and linear (20 m) and change of direction (COD) sprint tests, prior to and after an 8-week period, between two consecutive official tournaments, during which the concurrency between endurance and strength-power training commonly impairs neuromuscular capacities...
September 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27797733/german-translation-and-content-validation-of-the-ostrc-questionnaire-on-overuse-injuries-and-health-problems
#14
A Hirschmüller, K Steffen, K Fassbender, B Clarsen, R Leonhard, L Konstantinidis, N P Südkamp, E J Kubosch
OBJECTIVE: The aim of this study was to translate, culturally adapt and validate the Oslo Sports Trauma Research Centre (OSTRC) Questionnaire on Health Problems into the German context. METHODS: A slightly modified back-translation method was used to translate the questionnaire. Validation was done in 24 high-level Paralympic athletes followed over 20 consecutive weeks. RESULTS: The translated version of the questionnaire showed a very high internal consistency and good test-retest reliability (Cronbach's α 0...
October 20, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27785479/severe-progressive-scoliosis-in-an-adult-female-possibly-secondary-thoracic-surgery-in-childhood-treated-with-scoliosis-specific-schroth-physiotherapy-case-presentation
#15
Andrea Lebel, Victoria Ashley Lebel
BACKGROUND: Scoliosis is a complex three-dimensional (3D) spinal deformity. Acquired scoliosis in early childhood may progress into adulthood and pose an increased risk of health problems and reduction in quality of life. In Canada, patients with scoliosis are not referred for physiotherapeutic scoliosis-specific exercises (PSSE) despite the fact that Schroth physiotherapy, a scoliosis-specific 3D posture training and exercise program, can be effective in reducing pain and improving scoliosis curves, vital capacity, and overall quality of life in scoliosis patients...
2016: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/27782053/circulating-micrornas-as-potential-biomarkers-of-exercise-response
#16
REVIEW
Mája Polakovičová, Peter Musil, Eugen Laczo, Dušan Hamar, Ján Kyselovič
Systematic physical activity increases physical fitness and exercise capacity that lead to the improvement of health status and athletic performance. Considerable effort is devoted to identifying new biomarkers capable of evaluating exercise performance capacity and progress in training, early detection of overtraining, and monitoring health-related adaptation changes. Recent advances in OMICS technologies have opened new opportunities in the detection of genetic, epigenetic and transcriptomic biomarkers. Very promising are mainly small non-coding microRNAs (miRNAs)...
October 5, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27779439/comparison-of-ergometer-and-track-based-testing-in-junior-track-sprint-cyclists-implications-for-talent-identification-and-development
#17
Paul J Tofari, Stuart J Cormack, Tammie R Ebert, A Scott Gardner, Justin G Kemp
Talent identification (TID) and talent development (TDE) programmes in track sprint cycling use ergometer- and track-based tests to select junior athletes and assess their development. The purpose of this study was to assess which tests are best at monitoring TID and TDE. Ten male participants (16.2 ± 1.1 year; 178.5 ± 6.0 cm and 73.6 ± 7.6 kg) were selected into the national TID squad based on initial testing. These tests consisted of two 6-s maximal sprints on a custom-built ergometer and 4 maximal track-based tests (2 rolling and 2 standing starts) using 2 gear ratios...
October 25, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27768512/heart-rate-variability-during-deep-sleep-offers-a-time-efficient-alternative-to-morning-supine-measurements-a-study-in-world-class-alpine-skiers
#18
David Herzig, Moreno Testorelli, Daniela Schäfer Olstad, Daniel Erlacher, Peter Achermann, Prisca Eser, Matthias Wilhelm
BACKGROUND/AIM: There is increasing popularity for athletes to use heart rate variability (HRV) to tailor training. A time-efficient method is HRV assessment during deep sleep. The aim was to validate the selection of deep sleep segments identified by RR-intervals with simultaneous electroencephalography (EEG) recordings and to compare HRV parameters of these segments with those of standard morning supine measurements. METHODS: In 11 world class alpine- skiers, RR-intervals were monitored during ten nights and simultaneous EEGs were recorded in 2-4 nights...
September 26, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27736257/day-to-day-heart-rate-variability-hrv-recordings-in-world-champion-rowers-appreciating-unique-athlete-characteristics
#19
Daniel J Plews, Paul B Laursen, Martin Buchheit
PURPOSE: Heart rate variability (HRV) is a popular tool for monitoring autonomic nervous system status and training adaptation in athletes. It is believed that increases in HRV indicate effective training adaptation, but these are not always apparent in elite athletes. METHODS: Resting HRV was recorded in 4 elite rowers (Rower A, B, C and D) over the 7-week period prior to 2015 World Rowing Championship success. The natural logarithm of the square root of the mean sum of the squared differences between R-R intervals (Ln rMSSD), Ln rMSSD:R-R ratio trends, and the Ln rMSSD to R-R interval relationship were assessed for each champion-winning rower...
October 13, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27714955/restricting-dietary-sodium-reduces-plasma-sodium-response-to-exercise-in-the-heat
#20
E E Koenders, C P G Franken, J D Cotter, S N Thornton, N J Rehrer
Exercise-associated hyponatremia can be life-threatening. Excessive hypotonic fluid ingestion is the primary etiological factor but does not explain all variability. Possible effects of chronic sodium intake are unknown. The aim of this study was to determine whether dietary sodium affects plasma sodium concentration [Na(+) ] during exercise in the heat, when water intake nearly matches mass loss. Endurance-trained men (n = 9) participated in this crossover experiment. Each followed a low-sodium (lowNa) or high-sodium (highNa) diet for 9 days with 24-h fluid intakes and urine outputs measured before experimental trials (day 10)...
October 7, 2016: Scandinavian Journal of Medicine & Science in Sports
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