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https://www.readbyqxmd.com/read/28229568/yo-yo-ir1-vs-incremental-continuous-running-test-for-prediction-of-3000-m-performance
#1
Boris Schmitz, Andreas Klose, Katrin Schelleckes, Charlotte M Jekat, Michael Krüger, Stefan-Martin Brand
BACKGROUND: This study aimed to compare physiological responses during the Yo-Yo intermittent recovery level 1 (Yo-Yo IR1) test and an incremental continuous running field test (ICRT) and to analyze their predictive value on 3000 m running performance. METHODS: Forty moderately trained individuals (18 females) performed the ICRT and Yo-Yo IR1 test to exhaustion. The ICRT was performed as graded running test with an increase of 2.0 km·h-1 after each 3 min interval for lactate diagnostic...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28227055/hrv4training-large-scale-longitudinal-training-load-analysis-in-unconstrained-free-living-settings-using-a-smartphone-application
#2
Marco Altini, Oliver Amft, Marco Altini, Oliver Amft, Oliver Amft, Marco Altini
We describe an approach to support athletes at various fitness levels in their training load analysis using heart rate (HR) and heart rate variability (HRV). A smartphone-based application (HRV4Training) was developed that captures heart activity over one to five minutes using photoplethysmography (PPG) and derives HR and HRV features. HRV4Training integrated a guide for an early morning spot measurement protocol and a questionnaire to capture self-reported training activity. The smartphone application was made publicly available for interested users to quantify training effect...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28212266/individual-patterns-in-blood-borne-indicators-of-fatigue-trait-or-chance
#3
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/28207969/multiple-factors-explain-injury-risk-in-adolescent-elite-athletes-applying-a-biopsychosocial-perspective
#4
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/28182523/monitoring-hitting-load-in-tennis-using-inertial-sensors-and-machine-learning
#5
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
#6
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/28165873/overuse-physeal-injuries-in-youth-athletes
#7
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...
March 2017: Sports Health
https://www.readbyqxmd.com/read/28149376/a-new-physical-performance-classification-system-for-elite-handball-players-cluster-analysis
#8
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/28149347/application-of-a-physiological-strain-index-in-evaluating-responses-to-exercise-stress-a-comparison-between-endurance-and-high-intensity-intermittent-trained-athletes
#9
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
#10
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/28121796/sil-6r-is-related-to-weekly-training-mileage-and-psychological-well-being-in-athletes
#11
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
https://www.readbyqxmd.com/read/28121198/supercompensation-kinetics-of-physical-qualities-during-a-taper-in-team-sport-athletes
#12
Bruno Marrier, Julien Robineau, Julien Piscione, Mathieu Lacome, Alexis Peeters, Christophe Hausswirth, Jean-Benoît Morin, Yann Le Meur
PURPOSE: Peaking for major competition is considered critical for maximizing team sports performance. However, there is little scientific information available to guide coaches in prescribing efficient tapering strategies for team sports players. The aim of this study was to monitor the changes in physical performance in elite team sports players during a 3-week taper following a pre-season training camp. METHODS: Ten male international rugby sevens players were tested before (Pre) and after (Post) a 4-week pre-season training camp focusing on high-intensity training and strength training with moderate loads, and once each week during a subsequent 3-week taper (T1, T2, T3)...
January 25, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28095083/physiological-capacity-and-training-routines-of-elite-cross-country-skiers-approaching-the-upper-limits-of-human-endurance
#13
Øyvind Sandbakk, Hans-Christer Holmberg
Cross-country skiing is one of the most demanding of endurance sports, involving protracted competitions on varying terrain employing a variety of skiing techniques that require upper- and/or lower-body work to different extents. Through more effective training and extensive improvements in equipment and track preparation, the speed of cross-country ski races has increased more than that of any other winter Olympic sport and, in addition, new types of racing events have been introduced. To a certain extent this has altered the optimal physiological capacity required to win and the training routines of successful skiers have evolved accordingly...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28095075/a-pilot-study-using-entropy-as-a-non-invasive-assessment-of-running
#14
Andrew M Murray, Joong Hyun Ryu, John Sproule, Anthony P Turner, Phil Graham-Smith, Marco Cardinale
PURPOSE: Running performance is influenced by the interaction of biomechanical and physiological factors. Miniaturised accelerometers worn by the athlete can be used to quantify mechanical aspects of running and be used as a non-invasive tool to assess training status and progression. The aim of this study was to define and validate a method to assess running regularity and allow the estimation of an individual's V̇O2 and/or blood lactate [La]b based on data collected with accelerometers and heart rate (HR)...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28081034/the-effects-of-the-removal-of-electronic-devices-for-48-hours-on-sleep-in-elite-judo-athletes
#15
Ian C Dunican, David T Martin, Shona L Halson, Reid Reale, Brian Dawson, John Caldwell, Maddison J Jones, Peter R Eastwood
OBJECTIVE: This study examined the effects of the removal of electronic devices (i.e., smartphones, etc.) for 48 hours on sleep quality and next-day athletic and cognitive performance in elite Judo athletes. PARTICIPANTS: Over 6 days and nights, 23 eliteAustralian Judo athletes were monitored while attending a camp at the Australian Institute of Sport (AIS). In 14 athletes all electronic devices were removed on days 3 & 4 (i.e. for 48 hours: the 'device-restricted group') while 9 were permitted to use their devices throughout the camp (the 'control group')...
January 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28051335/managing-the-training-load-in-adolescent-athletes
#16
Andrew Murray
While historically adolescents were removed from their parents to prepare to become warriors, this process repeats itself in modern times but with the outcome being athletic performance. This review considers the process of developing athletes and managing load against the backdrop of differing approaches of conserving and maximizing the talent available. It acknowledges the typical training 'dose' that adolescent athletes receive across a number of sports and the typical 'response' when it is excessive or not managed appropriately...
January 4, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28018192/differences-in-resting-state-functional-connectivity-between-young-adult-endurance-athletes-and-healthy-controls
#17
David A Raichlen, Pradyumna K Bharadwaj, Megan C Fitzhugh, Kari A Haws, Gabrielle-Ann Torre, Theodore P Trouard, Gene E Alexander
Expertise and training in fine motor skills has been associated with changes in brain structure, function, and connectivity. Fewer studies have explored the neural effects of athletic activities that do not seem to rely on precise fine motor control (e.g., distance running). Here, we compared resting-state functional connectivity in a sample of adult male collegiate distance runners (n = 11; age = 21.3 ± 2.5) and a group of healthy age-matched non-athlete male controls (n = 11; age = 20.6 ± 1.1), to test the hypothesis that expertise in sustained aerobic motor behaviors affects resting state functional connectivity in young adults...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28017518/effectiveness-of-a-stress-management-pilot-program-aimed-at-reducing-the-incidence-of-sports-injuries-in-young-football-soccer-players
#18
Aurelio Olmedilla-Zafra, Victor J Rubio, Enrique Ortega, Alexandre García-Mas
OBJECTIVES: Several attempts to reduce the incidence of sport injuries using psychosocial interventions produced fruitful, although inconclusive results. This paper presents the effectiveness and implementation issues of a pilot 3-month stress-management and muscle relaxation program aimed at reducing sport injury incidence. DESIGN: Pre-post treatment-non treatment group comparison. PROGRAM ADMINISTRATION: The program was administered by a trained psychologist on a once-a-week, 1-h session basis...
September 6, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/27997264/decrease-in-ionized-and-total-magnesium-blood-concentrations-in-endurance-athletes-following-an-exercise-bout-restores-within-hours-potential-consequences-for-monitoring-and-supplementation
#19
Rieneke Terink, Michael G J Balvers, Maria T Hopman, Renger F Witkamp, Marco Mensink, Jacqueline M T Klein Gunnewiek
Magnesium is essential for optimal sport performance, generating an interest to monitor its status in athletes. However, before measuring magnesium status in blood could become routine, more insight into its diurnal fluctuations and effects of exercise itself is necessary. Therefore, we measured the effect of an acute bout of exercise on ionized (iMg) and total plasma magnesium (tMg) in blood obtained from 18 healthy well-trained endurance athletes (age, 31.1 ± 8.1 yr.; VO2max, 50.9 ± 7.5 ml/kg/min) at multiple time points, and compared this with a resting situation...
December 20, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27991484/relationship-between-the-handball-specific-complex-test-and-intermittent-field-test-performance-in-elite-professional-handball-players
#20
René Schwesig, Souhail Hermassi, Birgit Hoffmeyer, Lars Irlenbusch, Georg Fieseler, Frank Noack, Karl S Delank, Tim J Gabbett, Mohamed S Chelly
BACKGROUND: We investigated the relationship between the handball complex-test (HBCT) and two selected field tests in elite handball players. METHODS: Twenty one handball players (age: 25.2 ± 5.1 years) from the First Professional German League completed; the HBCT performed twice, total distance (TD) covered in the Yo-Yo Intermittent Recovery Test and repeated shuttle sprint ability (RSA) (6 x (15 + 15 m)) starting every 20 s. RSA results were evaluated in three ways: best time (RSAbest), total time (RSATT) and decrement (RSAdec)...
December 16, 2016: Journal of Sports Medicine and Physical Fitness
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