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Athlete Monitoring

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https://www.readbyqxmd.com/read/28214618/deep-neck-flexor-endurance-in-the-adolescent-and-young-adult-normative-data-and-associated-attributes
#1
Nathan F Jarman, Toby Brooks, C Roger James, Troy Hooper, Mark Wilhelm, Jean-Michel Brismée, Manuel A Domenech, Stanley J Kotara, Phillip S Sizer
BACKGROUND: Deep neck flexor (DNF) muscles stabilize the neck and contribute to head acceleration control. The function of DNF in cervical spine dynamic stabilization has not been examined in athletes of any age group, including adolescents. This investigation was necessary prior to studying the DNF muscles' role in cervical spine injury patterns. OBJECTIVES: (1) To determine average Deep Neck Flexor Endurance Test (DNFET) time scores in high school and university-aged subjects (ages 14-22); and (2) To establish the relationship between gender and age for adolescent DNFET time scores...
February 15, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28212266/individual-patterns-in-blood-borne-indicators-of-fatigue-trait-or-chance
#2
Ross Julian, Tim Meyer, Hugh H K Fullagar, Sabrina Skorski, Mark Pfeiffer, Michael Kellmann, Alexander Ferrauti, Anne Hecksteden
Julian, R, Meyer, T, Fullagar, HHK, Skorski, S, Pfeiffer, M, Kellmann, M, Ferrauti, A, and Hecksteden, A. Individual patterns in blood-borne indicators of fatigue-trait or chance. J Strength Cond Res 31(3): 608-619, 2017-Blood-borne markers of fatigue such as creatine kinase (CK) and urea (U) are widely used to fine-tune training recommendations. However, predictive accuracy is low. A possible explanation for this dissatisfactory characteristic is the propensity of athletes to react to different patterns of fatigue indicators (e...
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28212265/variations-in-oxidative-stress-levels-in-3-days-follow-up-in-ultramarathon-mountain-race-athletes
#3
Ypatios Spanidis, Dimitrios Stagos, Marina Orfanou, Nikolaos Goutzourelas, David Bar-Or, Demetrios Spandidos, Demetrios Kouretas
Spanidis, Y, Stagos, D, Orfanou, M, Goutzourelas, N, Bar-or, D, Spandidos, D, and Kouretas, D. Variations in oxidative stress levels in 3 days follow-up in ultramarathon mountain race athletes. J Strength Cond Res 31(3): 582-594, 2017-The aim of the present study was the monitoring of the redox status of runners participating in a mountain ultramarathon race of 103 km. Blood samples from 12 runners were collected prerace and 24, 48, and 72 hours postrace. The samples were analyzed by using conventional oxidative stress markers, such as protein carbonyls (CARB), thiobarbituric acid reactive substances (TBARS), total antioxidant capacity (TAC) in plasma, as well as glutathione (GSH) levels and catalase (CAT) activity in erythrocytes...
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28212118/role-of-chronic-exercise-on-pelvic-floor-support-and-function
#4
Janet M Shaw, Ingrid E Nygaard
PURPOSE OF REVIEW: To summarize recent literature about the potential role of chronic exercise on pelvic floor support and function. RECENT FINDINGS: Stress urinary incontinence is common during physical activity. Scant evidence suggests a dose-response association between higher volumes of exercise and urinary incontinence. Athletes do not appear to have greater pelvic floor muscle strength or worse pelvic floor support compared to nonathletes. Pelvic floor muscle electromyographic activity increases substantially as running speeds increase...
February 16, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28207969/multiple-factors-explain-injury-risk-in-adolescent-elite-athletes-applying-a-biopsychosocial-perspective
#5
Philip von Rosen, Anna Frohm, Anders Kottorp, Cecilia Fridén, Annette Heijne
Many risk factors for injury are presented in the literature, few of those are however consistent and the majority is associated with adult and not adolescent elite athletes. The aim was to identify risk factors for injury in adolescent elite athletes, by applying a biopsychosocial approach. A total of 496 adolescent elite athletes (age range 15-19), participating in 16 different sports, were monitored repeatedly over 52 weeks using a validated questionnaire about injuries, training exposure, sleep, stress, nutrition and competence-based self-esteem...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28197695/rotational-glenohumeral-adaptations-are-associated-with-shoulder-pathology-in-professional-male-handball-players
#6
Przemyslaw Lubiatowski, Piotr Kaczmarek, Pawel Cisowski, Ewa Breborowicz, Monika Grygorowicz, Marcin Dzianach, Tomasz Krupecki, Lior Laver, Leszek Romanowski
PURPOSE: Glenohumeral range of motion adaptations may affect throwing athletes and contribute to shoulder injury. The purpose of this study was to evaluate shoulder rotation deficits among elite professional handball players and its correlation to the presence of shoulder pain and morphological changes. METHODS: Eighty-seven elite professional handball players and 41 healthy non-athlete volunteers participated in the study. Evaluations included measurement of range of internal and external rotation, total arch of motion, identification of shoulder pain and ultrasound scan for diagnosis of rotator cuff tears and internal impingement...
February 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28195974/validity-of-the-elite-hrv-smart-phone-application-for-examining-heart-rate-variability-in-a-field-based-setting
#7
A S Perrotta, A Jeklin, B A Hives, L E Meanwell, D E R Warburton
The introduction of smart phone applications has allowed athletes and practitioners to record and store R-R intervals on smart phones for immediate heart rate variability (HRV) analysis. This user-friendly option should be validated in the effort to provide practitioners confidence when monitoring their athletes before implementing such equipment.The objective of this investigation was to examine the relationship between a vagal related HRV index, rMSSD when derived from a smart phone application accessible with most smart phone operating systems against Kubios HRV 2...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28182523/monitoring-hitting-load-in-tennis-using-inertial-sensors-and-machine-learning
#8
David Whiteside, Olivia Cant, Molly Connolly, Machar Reid
PURPOSE: Quantifying external workload is fundamental to training prescription in sport. In tennis, global positioning data are imprecise and fail to capture hitting loads. The current gold standard (manual notation) is time intensive and often not possible given players' heavy travel schedules. The aim of this study was to develop an automated stroke classification system to help quantify hitting load in tennis. METHODS: 18 athletes wore an inertial measurement unit (IMU) on their wrist during 66 video-recorded training sessions...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28181710/on-field-prediction-vs-monitoring-of-aerobic-capacity-markers-using-submaximal-lactate-and-heart-rate-measures
#9
Ibai Garcia-Tabar, Mikel Izquierdo, Esteban M Gorostiaga
This study aimed to validate the use of a single blood lactate concentration measurement taken following a 5-min running bout at 10 km·h(-1) (BLC10 ) and the speed associated with 90% of maximal heart rate (S90 ) to predict and monitor fixed blood lactate concentration (FBLC) thresholds in athletes. Three complementary studies were undertaken. Study-I: A cross-sectional study examining the associations of BLC10 and S90 with running speeds at FBLC of 3 (S3mM) and 4 mmol·L(-1) (S4mM) in 100 athletes. Study-II: A cross-validation study assessing the predictive capacity of BLC10 and S90 to estimate FBLC thresholds in real practice...
February 9, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28169152/sleep-patterns-and-match-performance-in-elite-australian-basketball-athletes
#10
Craig Staunton, Brett Gordon, Edhem Custovic, Jonathan Stanger, Michael Kingsley
OBJECTIVES: To assess sleep patterns and associations between sleep and match performance in elite Australian female basketball players. DESIGN: Prospective cohort study. METHODS: Seventeen elite female basketball players were monitored across two consecutive in-season competitions (30 weeks). Total sleep time and sleep efficiency were determined using triaxial accelerometers for Baseline, Pre-match, Match-day and Post-match timings. Match performance was determined using the basketball efficiency statistic (EFF)...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28165873/overuse-physeal-injuries-in-youth-athletes
#11
Amanda Arnold, Charles A Thigpen, Paul F Beattie, Michael J Kissenberth, Ellen Shanley
CONTEXT: Despite rising awareness of the risks associated with sports participation, overuse injuries continue to increase in youth athlete populations. Physeal injuries are one type of overuse injury exclusive to pediatric populations that are often sustained during athletic practice or competition. Overuse physeal injuries are, in theory, preventable; however, little consensus has been reached surrounding the risk factors, prevention, and treatment strategies. OBJECTIVE: This systematic review summarizes the best available evidence concerning overuse physeal injuries in youth and adolescent athletes...
February 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28156209/qualitative-and-semiquantitative-analysis-of-doping-products-seized-at-the-swiss-border
#12
Christina Weber, Oliver Krug, Matthias Kamber, Mario Thevis
BACKGROUND: Substances developed for therapeutic use are also known to be misused by athletes as doping agents and, outside of regulated sport, for image-enhancement. This has generated a market for counterfeit doping substances. Counterfeit doping agents may be of poor pharmaceutical quality and therefore constitute health risks to consumers. OBJECTIVES: This study aims to investigate the pharmaceutical quality of 1,190 doping products seized at the Swiss border...
February 3, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28149376/a-new-physical-performance-classification-system-for-elite-handball-players-cluster-analysis
#13
Iker J Bautista, Ignacio J Chirosa, Joseph E Robinson, Roland van der Tillaar, Luis J Chirosa, Isidoro Martínez Martín
The aim of the present study was to identify different cluster groups of handball players according to their physical performance level assessed in a series of physical assessments, which could then be used to design a training program based on individual strengths and weaknesses, and to determine which of these variables best identified elite performance in a group of under-19 [U19] national level handball players. Players of the U19 National Handball team (n=16) performed a set of tests to determine: 10 m (ST10) and 20 m (ST20) sprint time, ball release velocity (BRv), countermovement jump (CMJ) height and squat jump (SJ) height...
June 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149359/the-activity-profile-of-young-tennis-athletes-playing-on-clay-and-hard-courts-preliminary-data
#14
Lucas Adriano Pereira, Victor Freitas, Felipe Arruda Moura, Marcelo Saldanha Aoki, Irineu Loturco, Fábio Yuzo Nakamura
The aim of this study was to compare the kinematic characteristics of tennis matches between red clay and hard courts in young tennis players. Eight young tennis players performed two tennis matches on different court surfaces. The match activities were monitored using GPS units. The distance covered in different velocity ranges and the number of accelerations were analyzed. The paired t test and inference based on magnitudes were used to compare the match physical performance between groups. The total distance (24% of difference), high-intensity running distance (15 - 18 km/h) (30% of difference), the number of high-intensity activities (44% of difference), the body load (1% of difference), and accelerations >1...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149347/application-of-a-physiological-strain-index-in-evaluating-responses-to-exercise-stress-a-comparison-between-endurance-and-high-intensity-intermittent-trained-athletes
#15
Ilona Pokora, Aleksandra Żebrowska
The study evaluated differences in response to exercise stress between endurance and high-intensity intermittent trained athletes in a thermoneutral environment using a physiological strain index (PSI). Thirty-two subjects participated in a running exercise under normal (23°C, 50% RH) conditions. The group included nine endurance trained athletes (middle-distance runners - MD), twelve high-intensity intermittent trained athletes (soccer players - HIIT) and eleven students who constituted a control group. The exercise started at a speed of 4 km·h(-1) which was increased every 3 min by 2 km·h(-1) to volitional exhaustion...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28145740/adaptive-alterations-in-shoulder-range-of-motion-and-strength-in-young-tennis-players
#16
Benoit Gillet, Mickaël Begon, Violaine Sevrez, Christian Berger-Vachon, Isabelle Rogowski
CONTEXT:  Playing tennis requires unilateral and intensive movement of the upper limb, which may lead to functional adaptations of the shoulder and an increased injury risk. Identifying which athletes will be future elite tennis players starts at 5 to 6 years of age. Therefore, highly skilled players practice intensively in their childhood. However, whether these functional changes occur during the prepubertal years has not been established. OBJECTIVES:  To assess changes in glenohumeral-joint-rotation range of motion and strength of the shoulder-complex muscles in prepubertal elite tennis players...
February 1, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28135220/heart-rate-variability-discriminates-competitive-levels-in-professional-soccer-players
#17
Riccardo Proietti, Selenia di Fronso, A Pereira Lucas, Laura Bortoli, Claudio Robazza, Y Nakamura Fabio, Maurizio Bertollo
Heart rate variability (HRV) has been increasingly used to monitor team sports athletes. Besides the traditional time domain indices (i.e., the standard deviation of successive RR intervals [SDNN] and the root mean square difference of successive normal RR intervals [RMSSD]), recently it has been proposed the use of the stress score (SS), which is an inverse function of the standard deviation 2 index derived from the Poincaré plot, and the sympathetic/parasympathetic ratio (S/PS) to monitor soccer players...
January 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28135218/longer-sleep-durations-are-positively-associated-with-finishing-place-during-a-national-multi-day-netball-competition
#18
Laura E Juliff, Shona L Halson, Jeffrey Hebert, Peta L Forsyth, Jeremiah J Peiffer
Sleep is often regarded as the single best recovery strategy available to an athlete, yet little is known about the quality and quantity of sleep in athletes during multi-day competitions. The present study objectively evaluated sleep characteristics of athletes during a national netball tournament. Using wrist actigraphy monitors and sleep diaries 42 netballers from four state teams were monitored for the duration of a tournament (6 days) and 12 days prior in home environments. Significant differences were found between teams based on final competition standings, suggesting enhanced sleep characteristics in athlete's whose team finished higher in the tournament standings...
January 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28122770/factor-structure-of-impact%C3%A2-in-adolescent-student-athletes
#19
Paul B Gerrard, Grant L Iverson, Joseph E Atkins, Bruce A Maxwell, Ross Zafonte, Philip Schatz, Paul D Berkner
OBJECTIVE: ImPACT(®) (Immediate Post-Concussion Assessment and Cognitive Testing) is a computerized neuropsychological screening battery, which is widely used to measure the acute effects of sport-related concussion and to monitor recovery from injury. This study examined the factor structure of ImPACT(®) in several samples of high school student athletes. We hypothesized that a 2-factor structure would be present in all samples. METHOD: A sample of 4,809 adolescent student athletes was included, and subgroups with a history of treatment for headaches or a self-reported history of learning problems or attention-deficit hyperactivity disorder were analyzed separately...
February 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28121796/sil-6r-is-related-to-weekly-training-mileage-and-psychological-well-being-in-athletes
#20
Tom Cullen, Andrew W Thomas, Richard Webb, Thom Phillips, Michael G Hughes
INTRODUCTION: IL-6 has been ascribed both positive and negative roles in the context of exercise and training. The dichotomous nature of IL-6 signalling appears to be determined by the respective concentration of its receptors (both membrane-bound (IL-6R) and soluble (sIL-6R) forms). The purpose of the present study was to investigate the response of sIL-6R to long-term training, and to investigate the relationship between sIL-6R, self-reported measures of wellbeing, and upper respiratory illness symptoms (URS) in highly-trained endurance athletes...
January 24, 2017: Medicine and Science in Sports and Exercise
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