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https://www.readbyqxmd.com/read/29043512/comparisons-of-perceived-training-doses-in-champion-collegiate-level-male-and-female-cross-country-runners-and-coaches-over-the-course-of-a-competitive-season
#1
Kyle R Barnes
BACKGROUND: Session rating of perceived exertion (sRPE) is a practical tool for coaches to assess internal training load of their athletes. In a sport like cross-country running, that is individual in nature, but has a team training and competition component, information about the association between external and internal load is lacking. Furthermore, there is a need for studies that examine perception of training doses across multiple training cycles including the competitive season as well as between male and female athletes...
October 17, 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/29027973/smart-annotation-of-cyclic-data-using-hierarchical-hidden-markov-models
#2
Christine F Martindale, Florian Hoenig, Christina Strohrmann, Bjoern M Eskofier
Cyclic signals are an intrinsic part of daily life, such as human motion and heart activity. The detailed analysis of them is important for clinical applications such as pathological gait analysis and for sports applications such as performance analysis. Labeled training data for algorithms that analyze these cyclic data come at a high annotation cost due to only limited annotations available under laboratory conditions or requiring manual segmentation of the data under less restricted conditions. This paper presents a smart annotation method that reduces this cost of labeling for sensor-based data, which is applicable to data collected outside of strict laboratory conditions...
October 13, 2017: Sensors
https://www.readbyqxmd.com/read/29023329/living-and-training-at-825m-for-8-weeks-supplemented-with-intermittent-hypoxic-training-at-3000m-improves-blood-parameters-and-running-performance
#3
Preetiwat Wonnabussapawich, Michael J Hamlin, Catherine A Lizamore, Nuttaset Manimmanakorn, Naruemon Leelayuwat, Orathai Tunkamnerdthai, Worrawut Thuwakum, Apiwan Manimmanakorn
We aimed to investigate the effect of an 8-week low-altitude training block supplemented with intermittent hypoxic training, on blood and performance parameters in soccer players. Forty university-level male soccer players were separated into altitude (n = 20, 825m) or sea level (n = 20, 125m) groups. Before (1-2 days prior) and after (1 and 14 days post) training, players were asked to give a resting venous blood sample and complete a series of performance tests. Compared to sea level, the altitude group increased erythropoietin, red cell count and hematocrit 1 day post training (42...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28988514/long-term-effects-of-acoustic-reafference-training-art
#4
Alexandra Pizzera, Tanja Hohmann, Lukas Streese, Anja Habbig, Markus Raab
In sport visual feedback is often used to enhance performance, mostly neglecting the auditory modality. However, athletes produce natural sounds when they move (acoustic reafferences) which they perceive and use to control their movements. We examined the short- and long-term effects of a training intervention on a complex movement by using acoustic reafferences. Natural step sounds produced during hurdling were recorded and played back to the participants immediately before each trial, with an increase (fast group), decrease (slow group), or no manipulation (control group) in the tempo...
October 9, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28983866/running-performance-formula-see-text-and-running-economy-the-widespread-issue-of-endogenous-selection-bias
#5
REVIEW
Nicolai T Borgen
Studies in sport and exercise medicine routinely use samples of highly trained individuals in order to understand what characterizes elite endurance performance, such as running economy and maximal oxygen uptake ([Formula: see text]). However, it is not well understood in the literature that using such samples most certainly leads to biased findings and accordingly potentially erroneous conclusions because of endogenous selection bias. In this paper, I review the current literature on running economy and [Formula: see text], and discuss the literature in light of endogenous selection bias...
October 5, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28983841/evidence-based-concepts-for-prevention-of-knee-and-acl-injuries-2017-guidelines-of-the-ligament-committee-of-the-german-knee-society-dkg
#6
Julian Mehl, Theresa Diermeier, Elmar Herbst, Andreas B Imhoff, Thomas Stoffels, Thore Zantop, Wolf Petersen, Andrea Achtnich
INTRODUCTION: Knee injuries and especially anterior cruciate ligament (ACL) tears are frequent in athletes. Therefore, primary and secondary prevention of sports-related lower limb injuries is an ongoing topic of interest. The aim of present study was to establish guidelines for the prevention of knee and ACL injuries on the basis of evidence-based concepts represented in current literature. METHODS: A comprehensive literature review regarding prevention programs for knee and ACL injuries was conducted...
October 5, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28968523/raman-spectroscopy-applied-to-identify-metabolites-in-urine-of-physically-active-subjects
#7
Letícia Parada Moreira, Landulfo Silveira, Alexandre Galvão da Silva, Adriana Barrinha Fernandes, Marcos Tadeu Tavares Pacheco, Débora Dias Ferraretto Moura Rocco
Raman spectroscopy is a rapid and non-destructive technique suitable for biological fluids analysis. In this work, dispersive Raman spectroscopy has been employed as a rapid and nondestructive technique to detect the metabolites in urine of physically active subjects before and after vigorous 30min pedaling or running compared to sedentary subjects. For so, urine samples from 9 subjects were obtained before and immediately after physical activities and submitted to Raman spectroscopy (830nm excitation, 250mW laser power, 20s integration time) and compared to urine from 5 sedentary subjects...
September 22, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28944643/injury-rates-in-martial-art-athletes-anthropometric-parameters-and-training-volume-but-not-foot-morphology-indexes-are-predictive-risk-factors-for-lower-limb-injuries
#8
Jacopo A Vitale, Tito Bassani, Fabio Galbusera, Alberto Bianchi, Nicolò Martinelli
BACKGROUND: Previous studies attempted to identify possible risk factors for acute and overuse injuries in several sports disciplines such as running, gymnastics or team sports. Given the lack of scientific works focused on risk factors for lower limb injuries in martial arts, the present study was aimed to investigate foot anatomy, anthropometric measures, and other background information as possible risk factors of injury in barefoot athletes practicing judo, karate, kung fu, thai boxe, or aikido...
September 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28918787/-running-and-causes-of-running-related-injuries
#9
Camilla Kjær Cullum, Peter Hung Thanh Tran, Simon Døssing
Running is one of the most popular sports among the adult Danish population. Overuse injuries of the knee, such as runners knee, jumpers knee, patello-femoral pain syndrome and patello-femoral pre-arthrosis, are common and cause reduction of the health beneficial physical activity. Treatment should primarily focus on adjustment of training habits and physiotherapeutic guided rehabilitation. Other treatment options include changing landing pattern during running, corticosteroid injections, non-steroid anti-inflammatory drugs and ultimately surgery...
September 18, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28912649/does-live-high-train-low-and-high-hypoxic-training-alter-running-mechanics-in-elite-team-sport-players
#10
Olivier Girard, Grégoire P Millet, Jean-Benoit Morin, Franck Brocherie
This study aimed to investigate if "Live High-Train Low (and High)" hypoxic training alters constant-velocity running mechanics. While residing under normobaric hypoxia (≥14 h·d(-1); FiO2 14.5-14.2%) for 14 days, twenty field hockey players performed, in addition to their usual training in normoxia, six sessions (4 × 5 × 5-s maximal sprints; 25 s passive recovery; 5 min rest) under either normobaric hypoxia (FiO2 ~14.5%, n = 9) or normoxia (FiO2 20.9%, n = 11). Before and immediately after the intervention, their running pattern was assessed at 10 and 15 km·h(-1) as well as during six 30-s runs at ~20 km·h(-1) with 30-s passive recovery on an instrumented motorised treadmill...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28858057/effects-of-six-weeks-sprint-strength-and-agility-training-on-body-composition-cardiovascular-and-physiological-parameters-of-male-field-hockey-players
#11
Hanjabam Barun Sharma, Jyotsna Kailashiya
Optimal physiological and cardiovascular characteristics are essential for optimal physical performance. Different types of training regimes affect these characteristics and lead to trainee's adaptation and changes in relevant parameters. In present interventional study we have evaluated effects of six weeks sprint-strength & agility training on such parameters. Twenty four young Indian national hockey players volunteered for this study. BW(weight), BMI, BF (%body fat), LBM (lean body mass), rHR (resting heart rate), rBP (blood pressure), rDP (double-product), P/power (using Running-based Anaerobic Sprint Test), VJ (vertical jump), SP (seated shot-put test), BS (ball-hitting speed), Tm (505-agility test) & VO2max were measured, and changes (d) after specified training regime were studied...
August 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28827268/shoe-cushioning-body-mass-and-running-biomechanics-as-risk-factors-for-running-injury-a-study-protocol-for-a-randomised-controlled-trial
#12
Laurent Malisoux, Nicolas Delattre, Axel Urhausen, Daniel Theisen
INTRODUCTION: Repetitive loading of the musculoskeletal system is suggested to be involved in the underlying mechanism of the majority of running-related injuries (RRIs). Accordingly, heavier runners are assumed to be at a higher risk of RRI. The cushioning system of modern running shoes is expected to protect runners again high impact forces, and therefore, RRI. However, the role of shoe cushioning in injury prevention remains unclear. The main aim of this study is to investigate the influence of shoe cushioning and body mass on RRI risk, while exploring simultaneously the association between running technique and RRI risk...
August 21, 2017: BMJ Open
https://www.readbyqxmd.com/read/28820847/effectiveness-of-a-16-week-high-intensity-cardioresistance-training-program-in-adults
#13
Tina A Greenlee, Daniel R Greene, Nathan J Ward, Ginger E Reeser, Courtney M Allen, Nicholas W Baumgartner, Neal J Cohen, Arthur F Kramer, Charles H Hillman, Aron K Barbey
Greenlee, TA, Greene, DR, Ward, NJ, Reeser, GE, Allen, CM, Baumgartner, NW, Cohen, NJ, Kramer, AF, Hillman, CH, and Barbey, AK. Effectiveness of a 16-week high-intensity cardioresistance training program in adults. J Strength Cond Res 31(9): 2528-2541, 2017-The purpose of this study was to determine the efficacy of a novel, 16-week high-intensity cardioresistance training (HICRT) program on measures of aerobic fitness, agility, aerobic power, muscular endurance, lower-body explosive power, and self-reported activity level...
September 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28817655/assessing-experience-in-the-deliberate-practice-of-running-using-a-fuzzy-decision-support-system
#14
Maria Isabel Roveri, Edison de Jesus Manoel, Andrea Naomi Onodera, Neli R S Ortega, Vitor Daniel Tessutti, Emerson Vilela, Nelson Evêncio, Isabel C N Sacco
The judgement of skill experience and its levels is ambiguous though it is crucial for decision-making in sport sciences studies. We developed a fuzzy decision support system to classify experience of non-elite distance runners. Two Mamdani subsystems were developed based on expert running coaches' knowledge. In the first subsystem, the linguistic variables of training frequency and volume were combined and the output defined the quality of running practice. The second subsystem yielded the level of running experience from the combination of the first subsystem output with the number of competitions and practice time...
2017: PloS One
https://www.readbyqxmd.com/read/28812039/three-dimensional-biomechanical-analysis-of-rearfoot-and-forefoot-running
#15
Sebastian Knorz, Felix Kluge, Kolja Gelse, Stefan Schulz-Drost, Thilo Hotfiel, Matthias Lochmann, Björn Eskofier, Sebastian Krinner
BACKGROUND: In the running community, a forefoot strike (FFS) pattern is increasingly preferred compared with a rearfoot strike (RFS) pattern. However, it has not been fully understood which strike pattern may better reduce adverse joint forces within the different joints of the lower extremity. PURPOSE: To analyze the 3-dimensional (3D) stress pattern in the ankle, knee, and hip joint in runners with either a FFS or RFS pattern. STUDY DESIGN: Descriptive laboratory study...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28811750/availability-of-a-sports-dietitian-may-lead-to-improved-performance-and-recovery-of-ncaa-division-i-baseball-athletes
#16
Michael V Hull, Jonathan Neddo, Andrew R Jagim, Jonathan M Oliver, Mike Greenwood, Margaret T Jones
BACKGROUND: The purpose was to survey dietary habits (DH) and nutrient timing (NT) practices of baseball student-athletes (mean ± SD; 20.7 ± 1.4 yr.) from three NCAA Division I institutions, and examine the effect of a sports dietitian (SD) in regard to nutrition practices. METHODS: Descriptive statistics and Pearson X(2) analyses were run. Responses on 10 DH and 5 NT items differed (p ≤ 0.10) between athletes who sought dietary planning from a SD (n = 36) versus those who consulted a strength and conditioning coach (SCC, n = 42)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28790928/enhanced-right-chamber-remodeling-in-endurance-ultra-trail-athletes-compared-to-marathon-runners-detected-by-standard-and-speckle-tracking-echocardiography
#17
Kristian Ujka, Luca Bastiani, Gennaro D'Angelo, Bruna Catuzzo, Alessandro Tonacci, Simona Mrakic-Sposta, Alessandra Vezzoli, Guido Giardini, Lorenza Pratali
Background: Strenuous and endurance exercise training have been associated with morphological and functional heart remodeling. Two-dimensional speckle-tracking echocardiography (STE) is a novel technique that allows an accurate quantification of global myocardium deformation. Our aim was to evaluate together left and right cardiac remodeling in different long-distance running athletes: marathon runners (42 km) (M) and endurance mountain runners (>300 Km) (UT). Methods: A total of 92 athletes (70 males, 76%) including 47 M [age 45 ± 7 years; training: 18 (9-53) years(*)days/week], 45 UT [age 42 ± 9, training: 30 (15-66) years(*)days/week] underwent conventional echocardiography and STE (Beyond Diogenes 2...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28789630/moderate-endurance-training-marathon-training-effects-on-immunologic-and-metabolic-parameters-in-hiv-infected-patients-the-42-km-cologne-project
#18
Stefan Schlabe, Martin Vogel, Christoph Boesecke, Carolynne Schwarze-Zander, Jürgen K Rockstroh, Christian Körner, Klara Brixius, Jan-Christian Wasmuth
BACKGROUND: Improved treatment options of HIV have resulted in regular physical activities of many HIV-infected patients. However, data on effects of sports in HIV-patients are scarce. METHODS: 21 HIV-infected persons were monitored prospectively while preparing for a marathon run. Multiple parameters with regard to immunology, quality of life and metabolism were measured at 4 time points (at baseline 1 year before the marathon run, 3 and 6 months after beginning of training, and immediately before marathon)...
August 8, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28771098/physical-preparation-recommendations-for-elite-rugby-sevens-performance
#19
Jake Schuster, Dan Howells, Julien Robineau, Anthony Couderc, Alex Natera, Nick Lumley, Tim J Gabbett, Nick Winkelman
Rugby Sevens, a new Olympic sport, features high intensity intermittent running and contact efforts over short match durations, normally six times across two to three days in a tournament format. Elite Rugby Sevens seasons often include over a dozen competitive tournaments across less than nine months, demanding deliberate and careful training-stress balance and workload management alongside development of the necessary physical qualities required for competition. Focus on running and repeated power skills, strength, and match-specific conditioning capacities is advised...
August 3, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28742993/performance-and-return-to-sport-after-achilles-tendon-repair-in-national-football-league-players
#20
Robert A Jack, Kyle R Sochacki, Stephanie S Gardner, Patrick C McCulloch, David M Lintner, Pedro E Cosculluela, Kevin E Varner, Joshua D Harris
BACKGROUND: Achilles tendon injuries are common in sports, including football. The purpose of this study was to determine (1) return-to-sport rate in National Football League (NFL) players following Achilles tendon repair, (2) postoperative career length and games per season, (3) pre- and postoperative performance, and (4) postoperative performance compared with control players matched by position, age, years of experience, and performance. METHODS: Publicly available records were used to identify NFL players who underwent Achilles tendon repair and matched controls were identified...
July 1, 2017: Foot & Ankle International
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