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https://www.readbyqxmd.com/read/28530474/optimising-pre-season-training-loads-in-australian-football
#1
David L Carey, Justin Crow, Kok-Leong Ong, Peter Blanch, Meg E Morris, Ben J Dascombe, Kay M Crossley
PURPOSE: To investigate whether pre-season training plans for Australian football can be computer generated using current training load guidelines to optimise injury risk reduction and performance improvement. METHODS: A constrained optimisation problem was defined for daily total and sprint distance, using the pre-season schedule of an elite Australian football team as a template. Maximising total training volume and maximising Banister model projected performance were both considered as optimisation objectives...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28530452/overground-propulsion-kinematics-and-acceleration-in-elite-wheelchair-rugby
#2
David S Haydon, Ross A Pinder, Paul N Grimshaw, William S P Robertson
PURPOSE: Maximal acceleration from standstill has been identified as a key performance indicator in wheelchair rugby; however, the impact of classification and kinematic variables on performance has received limited attention. This study aimed to investigate kinematic variables during maximal acceleration, with level of activity limitation accounted for using sport classification scores. METHODS: 25 elite wheelchair rugby players were analysed in high-, mid-, and low-point groups based on their sporting classification score, which reflects the combined trunk, arm, and hand function, before completing five 5m sprints from a stationary position...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28529721/the-impact-of-antihypertensives-on-kidney-disease
#3
REVIEW
Diego F Marquez, Gema Ruiz-Hurtado, Luis Ruilope
Arterial hypertension and chronic kidney disease (CKD) are intimately related. The control of blood pressure (BP) levels is strongly recommended in patients with CKD in order to protect the kidney against the accompanying elevation in global cardiovascular (CV) risk. Actually, the goal BP in patients with CKD involves attaining values <140/90 mmHg except if albuminuria is present. In this case, it is often recommended to attain values <130/80 mmHg, although some guidelines still recommend <140/90 mmHg...
2017: F1000Research
https://www.readbyqxmd.com/read/28527477/secular-trends-in-anthropometrics-and-physical-fitness-of-young-portuguese-school-aged-children
#4
Aldo Matos Costa, Mário Jorge Costa, António Antunes Reis, Sandra Ferreira, Júlio Martins, Ana Pereira
INTRODUCTION: The purpose of this study was to analyze secular trends in anthropometrics and physical fitness of Portuguese children. MATERIAL AND METHODS: A group of 1819 students (881 boys and 938 girls) between 10 and 11 years old was assessed in their 5th and 6th scholar grade throughout a 20 years' time-frame. ANCOVA models were used to analyze variations in anthropometrics (height, weight and body mass index) and physical fitness (sit and reach, curl-up, horizontal jump and sprint time) across four quinquennials (1993 - 1998; 1998 - 2003; 2003 - 2008; 2008 - 2013)...
February 27, 2017: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28527424/influence-of-chronic-stretching-on-muscle-performance-systematic-review
#5
D M Medeiros, C S Lima
The aim of the current study was to investigate the influence of chronic stretching on muscle performance (MP) by a systematic review. The search strategy included MEDLINE, PEDro, Cochrane CENTRAL, LILACS, and manual search from inception to June 2016. Randomized and controlled clinical trials, non-randomized, and single group studies that have analyzed the influence of flexibility training (FT) (using any stretching technique) on MP were included. Differently, studies with special populations (children, elderly, and people with any dysfunction/disease), and articles that have used FT protocols shorter than three weeks or 12 sessions were excluded...
May 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28521221/high-intensity-repeated-sprints-impair-postural-control-but-with-no-effects-on-free-throwing-accuracy-in-under-19-basketball-players
#6
Fabio Augusto Barbieri, Sérgio Tosi Rodrigues, Paula Favaro Polastri, Ricardo Augusto Barbieri, Pedro Henrique Alves de Paula, Fabio Milioni, Paulo Eduardo Redkva, Alessandro Moura Zagatto
No abstract text is available yet for this article.
May 15, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28515832/a-low-dose-caffeine-and-carbohydrate-supplement-does-not-improve-athletic-performance-during-volleyball-competition
#7
David R Pfeifer, Kelsey M Arvin, Courtney N Herschberger, Nicholas J Haynes, Matthew S Renfrow
Dietary supplements are widely used to enhance sport performance and the combination of carbohydrate and caffeine (CHO+CAF) has yielded particularly high performance gains. Though the effects of a CHO+CAF supplement have been studied in a laboratory environment, little research exists on the effects of supplementation during competition. Therefore, the purpose of this study was to determine the effects of a CHO+CAF supplement on athletic performance in competition. Eight female collegiate volleyball players completed three testing sessions under three different conditions separated by approximately one week each: CHO+CAF supplement, placebo (PBO), and control (CTL) using a randomized, cross-over design...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28514202/the-physical-characteristics-of-match-play-in-english-schoolboy-and-academy-rugby-union
#8
Dale B Read, Ben Jones, Padraic J Phibbs, Gregory A B Roe, Joshua Darrall-Jones, Jonathon J S Weakley, Kevin Till
The aim was to compare the physical characteristics of under-18 academy and schoolboy rugby union competition by position (forwards and backs). Using a microsensor unit, match characteristics were recorded in 66 players. Locomotor characteristics were assessed by maximum sprint speed (MSS) and total, walking, jogging, striding and sprinting distances. The slow component (<2 m · s(-1)) of PlayerLoad(TM) (PLslow), which is the accumulated accelerations from the three axes of movement, was analysed as a measure of low-speed activity (e...
May 17, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28513103/a-systematic-review-and-meta-analysis-of-interval-training-versus-moderate-intensity-continuous-training-on-body-adiposity
#9
REVIEW
S E Keating, N A Johnson, G I Mielke, J S Coombes
Interval training (including high-intensity interval training [HIIT] and sprint interval training [SIT]) is promoted in both scientific and lay media as being a superior and time-efficient method for fat loss compared with traditional moderate-intensity continuous training (MICT). We evaluated the efficacy of HIIT/SIT when directly compared with MICT for the modulation of body adiposity. Databases were searched to 31 August 2016 for studies with exercise training interventions with minimum 4-week duration. Meta-analyses were conducted for within-group and between-group comparisons for total body fat percentage (%) and fat mass (kg)...
May 17, 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28512184/effect-of-intensive-blood-pressure-lowering-on-left-ventricular-hypertrophy-in-patients-with-hypertension-the-systolic-blood-pressure-intervention-sprint-trial
#10
Elsayed Z Soliman, Walter T Ambrosius, William C Cushman, Zhu-Ming Zhang, Jeffrey T Bates, Javier A Neyra, Thaddeus Y Carson, Leonardo Tamariz, Lama Ghazi, Monique E Cho, Brian P Shapiro, Jiang He, Lawrence J Fine, Cora E Lewis
Background -It is currently unknown whether intensive blood pressure (BP) lowering beyond that recommended would lead to more lowering of the risk of Left ventricular hypertrophy (LVH) in patients with hypertension, and whether reducing the risk of LVH explains the reported cardiovascular disease (CVD) benefits of intensive BP lowering in this population. Methods -This analysis included 8,164 participants (mean age 67.9 years, 35.3% women, 31.2% blacks) with hypertension but no diabetes from the Systolic Blood Pressure Intervention (SPRINT) Trial; 4,086 randomly assigned to intensive BP lowering (target systolic BP<120mmHg) and 4,078 assigned to standard BP lowering (target systolic BP <140mmHg)...
May 16, 2017: Circulation
https://www.readbyqxmd.com/read/28509631/improving-balance-mobility-and-dual-task-performance-in-an-adolescent-with-cerebral-palsy-a-case-report
#11
Sarah Fisher-Pipher, Lisa K Kenyon, Marci Westman
BACKGROUND AND PURPOSE: Improving functional mobility is often a desired outcome for adolescents with cerebral palsy (CP). Traditional neurorehabilitation approaches are frequently directed at impairments; however, improvements may not be carried over into functional mobility. The purpose of this case report was to describe the examination, intervention, and outcomes of a task-oriented physical therapy intervention program to improve dynamic balance, functional mobility, and dual-task performance in an adolescent with CP...
May 16, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28508114/oral-l-menthol-reduces-thermal-sensation-increases-work-rate-and-extends-time-to-exhaustion-in-the-heat-at-a-fixed-rating-of-perceived-exertion
#12
T R Flood, M Waldron, O Jeffries
PURPOSE: The study investigated the effect of a non-thermal cooling agent, L-menthol, on exercise at a fixed subjective rating of perceived exertion (RPE) in a hot environment. METHOD: Eight male participants completed two trials at an exercise intensity between 'hard' and 'very hard', equating to 16 on the RPE scale at ~35 °C. Participants were instructed to continually adjust their power output to maintain an RPE of 16 throughout the exercise trial, stopping once power output had fallen by 30%...
May 15, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28507165/reliability-and-validity-of-an-agility-like-incremental-exercise-test-with-multidirectional-change-of-direction-movements-in-response-to-a-visual-stimulus
#13
Dennis-Peter Born, Philipp Kunz, Billy Sperlich
The aim of the study was to evaluate the reliability and validity of cardiorespiratory and metabolic variables, that is, peak oxygen uptake (V'O2peak) and heart rate (HRpeak), obtained from an agility-like incremental exercise test for team sport athletes. To investigate the test-retest reliability, 25 team sport athletes (age: 22 ± 3 years, body mass: 75 ± 7 kg, height: 182 ± 6 cm) performed an agility-like incremental exercise test on the SpeedCourt (SC) system incorporating multidirectional change-of-direction (COD) movements twice...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28505545/leg-stiffness-during-sprinting-in-transfemoral-amputees-with-running-specific-prosthesis
#14
Yoko Sano, Atsushi Makimoto, Satoru Hashizume, Akihiko Murai, Yoshiyuki Kobayashi, Hiroshi Takemura, Hiroaki Hobara
Carbon fiber running-specific prostheses are designed to reproduce the spring-like stepping behavior of individuals similar to springs loaded by the entire body mass (i.e. spring-mass model). The aim of this study was to test whether leg stiffness would be modulated differently between intact and prosthetic legs in transfemoral amputees wearing RSP during sprinting. Eight unilateral transfemoral amputees performed maximum sprinting along an indoor overground runway. Leg stiffness was calculated from kinetic and kinematic data in intact and prosthetic legs...
May 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28502870/comparison-of-longevity-and-clinical-outcomes-of-implantable-cardioverter-defibrillator-leads-among-manufactures
#15
Satoshi Kawada, Nobuhiro Nishii, Yoshimasa Morimoto, Akihito Miyoshi, Motomi Tachibana, Hiroyasu Sugiyama, Koji Nakagawa, Atsuyuki Watanabe, Hiroshi Morita, Hiroshi Ito
BACKGROUND: An early failure of the Biotronik Linox S/SD implantable cardioverter defibrillator (ICD) lead has been reported. We have also experienced several cases with early failure of Linox leads. OBJECTIVE: Our aim was to assess the longevity of Linox S/SD compared to Sprint Fidelis, Sprint Quattro and Endotak Reliance leads. METHODS: We retrospectively reviewed patients who had undergone implantation of Linox S/SD (n=90), Sprint Fidelis (n=37), Sprint Quattro (n=27) or Endotak Reliance (n=50) leads between June 2000 and December 2013 at our hospital...
May 11, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28498791/the-influence-of-successive-matches-on-match-running-performance-during-an-under-23-international-soccer-tournament-the-necessity-of-individual-analysis
#16
Matthew C Varley, Valter Di Salvo, Mattia Modonutti, Warren Gregson, Alberto Mendez-Villanueva
This study investigated the effects of successive matches on match-running in elite under-23 soccer players during an international tournament. Match-running data was collected using a semi-automated multi-camera tracking system during an international under-23 tournament from all participating outfield players. Players who played 100% of all group stage matches were included (3 matches separated by 72 h, n = 44). Differences in match-running performance between matches were identified using a generalised linear mixed model...
May 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28497283/the-impact-of-resistance-training-on-swimming-performance-a-systematic-review
#17
REVIEW
Emmet Crowley, Andrew J Harrison, Mark Lyons
BACKGROUND: The majority of propulsive forces in swimming are produced from the upper body, with strong correlations between upper body strength and sprint performance. There are significant gaps in the literature relating to the impact of resistance training on swimming performance, specifically the transfer to swimming performance. OBJECTIVE: The aims of this systematic literature review are to (1) explore the transfer of resistance-training modalities to swimming performance, and (2) examine the effects of resistance training on technical aspects of swimming...
May 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28492286/has-the-sprint-trial-introduced-a-new-blood-pressure-goal-in-hypertension
#18
REVIEW
Gema Ruiz-Hurtado, José R Banegas, Pantelis A Sarafidis, Massimo Volpe, Bryan Williams, Luis M Ruilope
SPRINT is the first randomized, controlled trial showing that a systolic blood-pressure goal of <120 mmHg can be attained with cardiovascular benefits in a select group of patients with hypertension and an elevated cardiovascular risk with different origins. Although the patient population with characteristics like those in SPRINT makes up only 20-30% of the total hypertensive population, SPRINT is a landmark study that highlights the need to consider lower blood- pressure goals in the treatment of hypertension...
May 11, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28488832/road-to-the-olympics-physical-fitness-of-medalists-of-the-canoe-sprint-junior-european-and-world-championship-events-over-the-past-20-years
#19
Viktor Bielik, Leonard Lendvorský, Lukáš Lengvarský, Peter Lopata, Róbert Petriska, Jana Pelikánová
BACKGROUND: In this article we aimed to find out whether there is a difference in physiological, anthropometric and power variables between medalists in junior international Championship events (MJCH) and the remaining members of the national team (NT) in flat water canoe sprint. METHODS: Sixty male junior kayakers from Slovak NT were tested annually between years 1995 and 2016. Sixteen of them won at least one medal (gold, silver or bronze) at junior international Championship...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28488830/match-outcome-and-sprinting-activities-in-match-play-by-elite-german-soccer-players
#20
Marcin Andrzejewski, Paweł Chmura, Marek Konefał, Edward Kowalczuk, Jan Chmura
PURPOSE: The aim of the study was to examine the ways playing positions and match outcome (i.e. win, draw, loss) affect the sprint distance covered and the number of sprints performed by German Bundesliga soccer players. METHODS: Match performance data were collected from 350 soccer players competing in the German Bundesliga during the 2014/2015 domestic season. A total of 4393 individual match observations were undertaken on outfield players. The analysis was carried using the Impire AG motion analysis system with records of all movements of players in all the 306 matches...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
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