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https://www.readbyqxmd.com/read/29163210/a-wearable-test-for-maximum-aerobic-power-real-time-analysis-of-a-60-m-sprint-performance-and-heart-rate-off-kinetics
#1
Jorge L Storniolo, Gaspare Pavei, Alberto E Minetti
Maximum aerobic power ([Formula: see text]) as an indicator of body fitness is today a very well-known concept not just for athletes but also for the layman. Unfortunately, the accurate measurement of that variable has remained a complex and exhaustive laboratory procedure, which makes it inaccessible to many active people. In this paper we propose a quick estimate of it, mainly based on the heart rate off-kinetics immediately after an all-out 60-m sprint run. The design of this test took into account the recent availability of wrist wearable, heart band free, multi-sensor smart devices, which could also inertially detect the different phases of the sprint and check the distance run...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29163193/changes-in-muscle-and-cerebral-deoxygenation-and-perfusion-during-repeated-sprints-in-hypoxia-to-exhaustion
#2
Sarah J Willis, Laurent Alvarez, Grégoire P Millet, Fabio Borrani
During supramaximal exercise, exacerbated at exhaustion and in hypoxia, the circulatory system is challenged to facilitate oxygen delivery to working tissues through cerebral autoregulation which influences fatigue development and muscle performance. The aim of the study was to evaluate the effects of different levels of normobaric hypoxia on the changes in peripheral and cerebral oxygenation and performance during repeated sprints to exhaustion. Eleven recreationally active participants (six men and five women; 26...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29162340/effects-of-intensive-blood-pressure-treatment-on-acute-kidney-injury-events-in-the-systolic-blood-pressure-intervention-trial-sprint
#3
Michael V Rocco, Kaycee M Sink, Laura C Lovato, Dawn F Wolfgram, Thomas B Wiegmann, Barry M Wall, Kausik Umanath, Frederic Rahbari-Oskoui, Anna C Porter, Roberto Pisoni, Cora E Lewis, Julia B Lewis, James P Lash, Lois A Katz, Amret T Hawfield, William E Haley, Barry I Freedman, Jamie P Dwyer, Paul E Drawz, Mirela Dobre, Alfred K Cheung, Ruth C Campbell, Udayan Bhatt, Srinivasan Beddhu, Paul L Kimmel, David M Reboussin, Glenn M Chertow
BACKGROUND: Treating to a lower blood pressure (BP) may increase acute kidney injury (AKI) events. STUDY DESIGN: Data for AKI resulting in or during hospitalization or emergency department visits were collected as part of the serious adverse events reporting process of the Systolic Blood Pressure Intervention Trial (SPRINT). SETTING & PARTICIPANTS: 9,361 participants 50 years or older with 1 or more risk factors for cardiovascular disease...
November 18, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/29161984/the-prognostic-value-of-physiological-and-physical-characteristics-in-youth-soccer-a-systematic-review
#4
Dennis Murr, Johannes Raabe, Oliver Höner
Talent identification and selection in soccer is typically based on subjective evaluations of experienced coaches. Recently, there has been a trend to complement these subjective assessments with objective tests. However, there is currently no comprehensive overview of the prognostic relevance of objective measurements in youth soccer. Therefore, the primary purpose of the current study was to systematically review published empirical studies related to the prognostic relevance of physiological (e.g. endurance and speed) and physical characteristics (i...
November 21, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29158613/blood-pressure-heart-rate-and-perceived-enjoyment-after-small-sided-soccer-games-and-repeated-sprint-in-untrained-healthy-adolescents
#5
Amri Hammami, Sofien Kasmi, Paulo Farinatti, Taieb Fgiri, Karim Chamari, Ezdine Bouhlel
The purpose of this study was to examine systolic (SBP) and diastolic blood pressure (DBP), heart rate (HR), rating of perceived exertion (RPE) and perceived enjoyment responses to a repeated-sprint training session (RST) compared to a small-sided soccer game session (SSG) in untrained adolescents. Twelve healthy post-pubertal adolescent males (age 15.8±0.6 years, body mass 59.1±3.7 kg, height 1.7±0.1m) performed RST and SSG sessions in a randomized and counterbalanced order. Blood pressure and HR were measured at rest and at 10, 20 and 30 minutes after interventions, and RPE and enjoyment were assessed...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29145858/cognitive-appraisal-of-exposure-to-specific-types-of-trauma-a-study-of-gender-differences
#6
Dana-Cristina Herta, Bogdan Nemes, Doina Cozman
BACKGROUND: The role of gender in posttraumatic cognitions has increasingly been approached. The current study comparatively evaluates posttraumatic cognitions in men and women exposed to specific nonsexual trauma (motor vehicle accidents, work - related accidents, burns). METHODS: Posttraumatic cognitions and posttraumatic stress symptoms were comparatively assessed in 53 men and 37 women treated in 3 Romanian primary care units after specific accidental trauma...
November 16, 2017: BMC Women's Health
https://www.readbyqxmd.com/read/29143267/hamstring-injury-prevention-practices-in-elite-sport-evidence-for-eccentric-strength-vs-lumbo-pelvic-training
#7
REVIEW
Anthony J Shield, Matthew N Bourne
Hamstring strain injuries are endemic in running-based sports. Given the economic and performance implications of these injuries, a significant body of research has emerged in recent years in an attempt to identify risk factors and develop or optimise injury prevention strategies. Surveys of injury prevention practices among medical and conditioning staff in elite sport suggest that many sporting clubs invest significant efforts in eccentric hamstring conditioning and lumbo-pelvic or trunk stability programmes...
November 15, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29142272/individuals-of-the-common-namib-day-gecko-vary-in-how-adaptive-simplification-alters-sprint-biomechanics
#8
Clint E Collins, Timothy E Higham
Locomotion inextricably links biomechanics to ecology as animals maneuver through mechanically challenging environments. Faster individuals are more likely to escape predators, surviving to produce more offspring. Fast sprint speed evolved several times in lizards, including geckos. However, the underlying mechanisms determining performance await discovery in many clades. Novel morphological structures influence these mechanisms by adding complexity to the government of locomotion. Gecko adhesion coevolves with modified muscles, tendons, and reflexes...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29141584/sprint-ultrafast-protein-protein-interaction-prediction-of-the-entire-human-interactome
#9
Yiwei Li, Lucian Ilie
BACKGROUND: Proteins perform their functions usually by interacting with other proteins. Predicting which proteins interact is a fundamental problem. Experimental methods are slow, expensive, and have a high rate of error. Many computational methods have been proposed among which sequence-based ones are very promising. However, so far no such method is able to predict effectively the entire human interactome: they require too much time or memory. RESULTS: We present SPRINT (Scoring PRotein INTeractions), a new sequence-based algorithm and tool for predicting protein-protein interactions...
November 15, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/29141496/power-and-pacing-calculations-based-on-real-time-locating-data-from-a-cross-country-skiing-sprint-race
#10
Mikael Swarén, Anders Eriksson
Pacing strategies in cross-country skiing have been investigated in several studies. However, none of the previous studies have been verified by collected skiing data giving the skiing velocities along a measured track. These can be used to calculate the propulsive power output. Collected real-time positioning data from a cross-country sprint skiing race were used to estimate the propulsive power by applying a power balance model. Analyses were made for the time-trial and the final for one female and one male skier...
November 15, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29140914/sequencing-effects-of-neuromuscular-training-on-physical-fitness-in-youth-elite-tennis-players
#11
Jaime Fernandez-Fernandez, Urs Granacher, David Sanz-Rivas, Jose Manuel Sarabia Marín, Jose Luis Hernandez-Davo, Manuel Moya
Fernandez-Fernandez, J, Granacher, U, Sanz-Rivas, D, Sarabia Marín, JM, Hernandez-Davo, JL, and Moya, M. Sequencing effects of neuromuscular training on physical fitness in youth elite tennis players. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to analyze the effects of a 5-week neuromuscular training (NMT) implemented before or after a tennis session in prepubertal players on selected components of physical fitness. Sixteen elite and well-trained tennis players with a mean age of 12...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140912/reliable-testing-battery-for-assessing-physical-qualities-of-elite-academy-rugby-league-players
#12
Nick Dobbin, Richard Hunwicks, Jamie Highton, Craig Twist
Dobbin, N, Hunwicks, R, Highton, J, and Twist, C. Reliable testing battery for assessing physical qualities of elite academy rugby league players. J Strength Cond Res XX(X): 000-000, 2017-This study assessed the interday reliability of a testing battery for the assessment of physical qualities of rugby league players. Fifty players (age 17.1 ± 1.1 years; stature 181.3 ± 6.3 cm; and body mass 89.0 ± 11.6 kg) from 3 Super League academies participated in this study. Tests of countermovement jump performance, 10- and 20-m sprint performance, change of direction, medicine ball throw, and a modified Yo-Yo Intermittent Recovery Test Level 1 (prone Yo-Yo IR1) were completed on 3 separate occasions...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29140147/sprint-running-performance-and-technique-changes-in-athletes-during-periodized-training-an-elite-training-group-case-study
#13
Ian N Bezodis, David G Kerwin, Stephen-Mark Cooper, Aki I T Salo
PURPOSE: To understand how training periodization influences sprint performance and key step characteristics over an extended training period in an elite sprint training group. METHODS: Four sprinters were studied during five months of training. Step velocities, step lengths and step frequencies were measured from video of the maximum velocity phase of training sprints. Bootstrapped mean values were calculated for each athlete for each session and 139 within-athlete, between-session comparisons were made with a repeated measures ANOVA...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29133606/effects-of-bariatric-surgery-in-obese-patients-with-hypertension-the-gateway-randomized-trial-gastric-bypass-to-treat-obese-patients-with-steady-hypertension
#14
Carlos Aurelio Schiavon, Angela Cristine Bersch-Ferreira, Eliana Vieira Santucci, Juliana Dantas Oliveira, Camila Ragne Torreglosa, Priscila Torres Bueno, Julia Caldas Frayha, Renato Nakagawa Santos, Lucas Petri Damian, Patricia Malvina Noujaim, Helio Halpern, Frederico L J Monteiro, Ricardo Vitor Cohen, Carlos H Uchoa, Marcio Gonçalves de Souza, Celso Amodeo, Luiz Bortolotto, Dimas Ikeoka, Luciano F Drager, Alexandre Biasi Cavalcanti, Otavio Berwanger
BACKGROUND : Recent research efforts on bariatric surgery have focused on metabolic and diabetes mellitus resolution. Randomized trials designed to assess the impact of bariatric surgery in patients with obesity and hypertension are needed. METHODS : In this randomized, single-center, nonblinded trial, we included patients with hypertension (using ≥2 medications at maximum doses or >2 at moderate doses) and a body mass index between 30.0 and 39.9 kg/m(2) Patients were randomized to Roux-en-Y gastric bypass plus medical therapy or medical therapy alone...
November 13, 2017: Circulation
https://www.readbyqxmd.com/read/29133522/systolic-blood-pressure-response-in-sprint-systolic-blood-pressure-intervention-trial-and-accord-action-to-control-cardiovascular-risk-in-diabetes-a-possible-explanation-for-discordant-trial-results
#15
Chenxi Huang, Sanket S Dhruva, Andreas C Coppi, Frederick Warner, Shu-Xia Li, Haiqun Lin, Khurram Nasir, Harlan M Krumholz
BACKGROUND: SPRINT (Systolic Blood Pressure Intervention Trial) and the ACCORD (Action to Control Cardiovascular Risk in Diabetes) blood pressure trial used similar interventions but produced discordant results. We investigated whether differences in systolic blood pressure (SBP) response contributed to the discordant trial results. METHODS AND RESULTS: We evaluated the distributions of SBP response during the first year for the intensive and standard treatment groups of SPRINT and ACCORD using growth mixture models...
November 13, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29132264/leg-amputation-side-determines-performance-in-curve-sprinting-a-case-study-on-a-paralympic-medalist
#16
Johannes Funken, Kai Heinrich, Steffen Willwacher, Ralf Müller, Jonas Böcker, Hiroaki Hobara, Gert-Peter Brüggemann, Wolfgang Potthast
The lower limb kinetics of curve sprinting in amputees are not well described in the literature, particularly with respect to the effect of the side of amputation. This is an issue due to the importance of the knowledge for prosthetic design and classification of athletes. Thus, the aim of this study was to investigate the influence of side of amputation on curve sprinting performance in athletes with a unilateral leg amputation. A three-dimensional motion analysis system (Vicon), four force plates (Kistler) and a modified mathematical human model (ALASKA) were used to compare clockwise and counter clockwise curve sprinting lower limb kinematics and kinetics of a Paralympic medalist with a left-sided knee exarticular amputation...
November 13, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29131079/are-inflammatory-cytokines-associated-with-pain-during-acute-myocardial-infarction
#17
Laurin Imholz, Rebecca E Meister-Langraf, Mary Princip, Michaela Fux, Ulrich Schnyder, Jürgen Barth, Hansjörg Znoj, Jean-Paul Schmid, Roland von Känel
OBJECTIVE: Pain and inflammation during acute myocardial infarction (AMI) have been associated with the development of posttraumatic stress disorder and may also impact negatively on somatic outcome. We investigated the relationship between pain during AMI and levels of circulating proinflammatory (tumor necrosis factor [TNF]-α, interleukin [IL]-6) and anti-inflammatory (IL-33 and tissue growth factor [TGF]-β1) cytokines. METHODS: Data were collected as part of the Myocardial Infarction - Stress Prevention Intervention (MI-SPRINT) study...
November 4, 2017: Neuroimmunomodulation
https://www.readbyqxmd.com/read/29126336/sprint-interval-training-decreases-circulating-micrornas-important-for-muscle-development
#18
Joshua Denham, Adrian Gray, John Scott-Hamilton, Amanda D Hagstrom
Small non-coding RNAs, such as microRNAs (miRNAs), have emerged as powerful post-transcriptional regulators of gene expression that play important roles in many developmental and biological processes. In this study, we assessed the abundance of circulating microRNAs important for skeletal muscle and heart adaptations to exercise (miR-1, miR-133a, miR-133b and miR-486), following acute exercise and short-term sprint interval training (SIT). Twenty-eight individuals completed four all-out efforts on a cycle ergometer, and donated blood before and 30 min after the cessation of exercise...
November 10, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29125040/reliability-of-horizontal-force-velocity-power-profiling-during-short-sprint-running-accelerations-using-radar-technology
#19
Kim David Simperingham, John B Cronin, Simon N Pearson, Angus Ross
Radar technology can be used to perform horizontal force-velocity-power profiling during sprint-running. The aim of this study was to determine the reliability of radar-derived profiling results from short sprint accelerations. Twenty-seven participants completed three 30 m sprints (intra-day analysis), and nine participants completed the testing session on four separate days (inter-day analysis). The majority of radar-derived kinematic and kinetic descriptors of short sprint performance had acceptable intra-day and inter-day reliability [intraclass correlation coefficient (ICC) ≥ 0...
November 10, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29125029/match-derived-relative-pitch-area-changes-the-physical-and-team-tactical-performance-of-elite-soccer-players-in-small-sided-soccer-games
#20
Sigrid B H Olthof, Wouter G P Frencken, Koen A P M Lemmink
Small-sided games (SSGs) are used in training sessions to prepare for full-sized matches. For the same number of players, smaller pitch sizes result in decreased physical performance and shorter interpersonal distances. A relative pitch area derived from the full-sized match results in larger pitch sizes and this may increase the fit between SSGs and full-sized matches. This study aimed to investigate SSGs with a traditional small pitch and a match-derived relative pitch area in youth elite soccer players. Four age categories (under-13, under-15, under-17 and under-19) played 4 vs...
November 10, 2017: Journal of Sports Sciences
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