The Reliability of a Pre-Loaded Treadmill Time-Trial in Moderate Normobaric Hypoxia.

Abstract:

:The purpose of this study was to assess the reliability of a pre-loaded 1 500-m treadmill time trial, conducted in moderate normobaric hypoxia. 8 trained runners/triathletes (24±3 years, 73.2±8.1 kg, 182.5±6.5 cm, altitude specific V˙O2max: 52.9±5.5 ml·kg(-1)·min(-1)) completed 3 trials (the first as a familiarisation), involving 2, 15-min running bouts at 45% and 65% V˙O2max, respectively, and a 1 500-m time trial in moderate normobaric hypoxia equivalent to a simulated altitude of 2 500 m (FiO2~15%). Heart rate, arterial oxygen saturation, skeletal muscle and cerebral tissue oxygenation (StO2), expired gas ( V˙O2 and V˙CO2), and ratings of perceived exertion were monitored. Running performance (Trial 1: 352.7±40; Trial 2: 353.9±38.2 s) demonstrated a low CV (0.9%) and high ICC (1). All physiological variables demonstrated a global CV≤4.2%, and ICC≥0.87, with the exception of muscle (CV 10.4%; ICC 0.70) and cerebral (CV 4.1%; ICC 0.82) StO2. These data demonstrate good reliability of the majority of physiological variables and indicate that a pre-loaded 1 500-m time trial conducted in moderate normobaric hypoxia is a highly reliable test of performance.

journal_name

Int J Sports Med

authors

Shannon O,Barlow M,Duckworth L,Woods DR,Barker T,Grindrod A,Griffiths A,O'Hara JP

doi

10.1055/s-0042-108651

subject

Has Abstract

pub_date

2016-09-01 00:00:00

pages

825-30

issue

10

eissn

0172-4622

issn

1439-3964

journal_volume

37

pub_type

杂志文章
  • Contribution of trunk muscularity on sprint run.

    abstract::This study aimed to investigate how the trunk muscularity is related to sprint running performance. In 23 youth soccer players, the cross-sectional images at the mid level of each of L1-L2, L2-L3, L3-L4, L4-L5, and L5-S1 were obtained using magnetic resonance imaging to determine the cross-sectional areas (CSAs) of re...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0030-1268502

    authors: Kubo T,Hoshikawa Y,Muramatsu M,Iida T,Komori S,Shibukawa K,Kanehisa H

    更新日期:2011-03-01 00:00:00

  • Changes of white blood cell count during prolonged exercise.

    abstract::Leukocytosis was postulated to accompany short- and medium-length exercise; in this report, we have studied the changes in leukocyte count during and following prolonged exercise. White blood cell (WBC) counts were obtained in 15 endurance-trained subjects before, during, and at a recovery period after an ultralong ex...

    journal_title:International journal of sports medicine

    pub_type: 临床试验,杂志文章

    doi:10.1055/s-2008-1025664

    authors: Galun E,Burstein R,Assia E,Tur-Kaspa I,Rosenblum J,Epstein Y

    更新日期:1987-08-01 00:00:00

  • The effect of an anti-G suit on the maximal performance of individuals with paraplegia.

    abstract::The purpose of this study was to examine whether lower body positive pressure (LBPP) could improve maximal performance in paraplegic subjects (P). LBPP may diminish venous blood pooling (VBP) below the lesion and, therefore, support the redistribution of blood during exercise. Twelve male P subjects with complete spin...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2007-1021192

    authors: Hopman MT,Kamerbeek IC,Pistorius M,Binkhorst RA

    更新日期:1993-10-01 00:00:00

  • Effect of loading on unintentional lifting velocity declines during single sets of repetitions to failure during upper and lower extremity muscle actions.

    abstract::The purpose of this study was to examine the effect of different loads on repetition speed during single sets of repetitions to failure in bench press and parallel squat. Thirty-six physical active men performed 1-repetition maximum in a bench press (1 RM (BP)) and half squat position (1 RM (HS)), and performed maxima...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2005-872825

    authors: Izquierdo M,González-Badillo JJ,Häkkinen K,Ibáñez J,Kraemer WJ,Altadill A,Eslava J,Gorostiaga EM

    更新日期:2006-09-01 00:00:00

  • Anaerobic running capacity determined from a 3-parameter systems model: relationship with other anaerobic indices and with running performance in the 800 m-run.

    abstract::The purpose of this study was to compare anaerobic running capacity (ARC, i.e., the distance that can be run using only stored energy sources in the muscle) determined from a 3-parameter systems model with other anaerobic indices and with running performance in the 800 m. Seventeen trained male subjects (.VO(2max) = 6...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2006-924516

    authors: Bosquet L,Delhors PR,Duchene A,Dupont G,Leger L

    更新日期:2007-06-01 00:00:00

  • Bone mineral density in Hispanic women: role of aerobic capacity, fat-free mass, and adiposity.

    abstract::Understanding the etiology of factors influencing bone mineral density (BMD) in Hispanic women for the prevention of osteoporosis was the aim of this investigation. Whole body BMD (WBBMD) of 39 Hispanic, premenopausal women aged 22 - 51 years was measured using dual-energy X-ray absorptiometry (DXA). Maximal aerobic c...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2004-815839

    authors: Afghani A,Abbott AV,Wiswell RA,Jaque SV,Gleckner C,Schroeder ET,Johnson CA

    更新日期:2004-07-01 00:00:00

  • Loss of motor control and/or loss of consciousness during breath-hold competitions.

    abstract::Since the first official world championships in breath-hold diving (1996), a sport has developed where the athletes compete in various disciplines of breath-hold diving. One of the rules is that the diver should surface from a dive without showing any signs of hypoxia. Depending on the severity of hypoxia, a diver may...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2006-924361

    authors: Lindholm P

    更新日期:2007-04-01 00:00:00

  • Exercise-induced signs of muscle overuse in children.

    abstract::Signs of overuse after intense muscular exertion are well described in adults, while little research has been conducted in children. The aim of the study was to investigate some indirect markers of muscle damage in 13 years old boys following two different protocols of one-leg stepping exercise to exhaustion. This ste...

    journal_title:International journal of sports medicine

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1055/s-2007-971101

    authors: Duarte JA,Magalhães JF,Monteiro L,Almeida-Dias A,Soares JM,Appell HJ

    更新日期:1999-02-01 00:00:00

  • Long term changes of the throwing arm of former elite javelin throwers.

    abstract::The aim of this study was to determine long term changes in shoulder and elbow joints of former elite javelin throwers. Twenty-one elite javelin throwers were examined at an average of 19 years after the end of their high performance phase. Mean age at examination was 50 years. Functional assessment of both shoulders ...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2001-13814

    authors: Schmitt H,Hansmann HJ,Brocai DR,Loew M

    更新日期:2001-05-01 00:00:00

  • Effects of carbohydrate beverage ingestion on the salivary IgA response to intermittent exercise in the heat.

    abstract::The purpose of this study was to establish if provision of CHO altered the mucosal immune and salivary cortisol responses to intermittent exercise in the heat. In a double-blind design, 10 males undertook soccer-specific intermittent exercise on a motorized treadmill on 2 occasions, each over 90 min and separated by 1...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章,随机对照试验

    doi:10.1055/s-0031-1271698

    authors: Sari-Sarraf V,Doran DA,Clarke ND,Atkinson G,Reilly T

    更新日期:2011-09-01 00:00:00

  • Effect of defensive pressure on movement behaviour during an under-18 basketball game.

    abstract::The aim of this study was to examine the effect of defensive pressure on movement behaviour during an under-18 basketball game. 20 international male players (age: M=16.05, SD=2.09 years old; weekly practice: M=10.9, SD=1.94 h; playing experience: M=7.1, SD=1.1 years) played two 10-min basketball quarters, using man-t...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0033-1363237

    authors: Leite NM,Leser R,Gonçalves B,Calleja-Gonzalez J,Baca A,Sampaio J

    更新日期:2014-08-01 00:00:00

  • Assessing the Effectiveness of Selected Biomarkers in the Acute and Cumulative Physiological Stress Response in Professional Rugby Union through Non-invasive Assessment.

    abstract::Rugby union is a sport involving high force and frequency impacts making the likelihood of injury a significant risk. The aim of this study was to measure and report the individual and group acute and cumulative physiological stress response during 3 professional rugby games through non-invasive sampling. 24 professio...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0034-1398528

    authors: Lindsay A,Lewis JG,Scarrott C,Gill N,Gieseg SP,Draper N

    更新日期:2015-06-01 00:00:00

  • The effects of aerobic training and age on plasma sICAM-1.

    abstract::Chronic low-grade systemic inflammation plays a role in the development of cardiovascular (CV) disease. Habitual endurance exercise training reduces the risk of CV disease in part through anti-inflammatory mechanisms. The purpose of this study was to investigate the effects of age, endurance training status, and their...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0032-1316317

    authors: Many GM,Jenkins NT,Witkowski S,Damsker JM,Hagberg J

    更新日期:2013-03-01 00:00:00

  • Body Composition Evolution in Elite Football Referees; an Eleven-years Retrospective Study.

    abstract::Fitness, and specifically body composition of football referees requires attention in order to achieve the highest possible standards. The aim of the present study was to describe body composition of elite Spanish football referees over 11 years. Data from 2001 to 2012 pre-seasons were analyzed from a total of 470 ref...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0034-1398582

    authors: Casajús JA,Gonzalez-Aguero A

    更新日期:2015-06-01 00:00:00

  • Tibiofemoral contact biomechanics following meniscocapsular separation and repair.

    abstract::Meniscocapsular separations are often seen in knees with other intra-articular pathology. The consequences of these tears with regard to knee contact mechanics are currently unknown, and the biomechanical advantages of repair have not been measured. We hypothesize that tears to the meniscocapsular junction will cause ...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0034-1398656

    authors: Dugas JR,Barrett AM,Beason DP,Plymale MF,Fleisig GS

    更新日期:2015-06-01 00:00:00

  • The reliability of (31)P-MRS and NIRS measurements of spinal muscle function.

    abstract::While phosphorous magnetic resonance spectroscopy ((31)P-MRS) and near-infrared spectroscopy (NIRS) provide methods for measuring spinal muscle function non-invasively, their reliability is not established. The aim of this study was assess the reliability (ICC) and error magnitude (CV%) of measurements of muscle phosp...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0034-1372639

    authors: Fulford J,Liepa A,Barker AR,Meakin J

    更新日期:2014-12-01 00:00:00

  • Effects of prestretch intensity on mechanical efficiency of positive work and on elastic behavior of skeletal muscle in stretch-shortening cycle exercise.

    abstract::Mechanical efficiency of positive work (eta+) and elastic behavior of human skeletal muscles were investigated on a special sledge apparatus which allowed the use of the normal stretch-shortening cycle exercises. Twenty-five young men were investigated in a total of 92 exercise situations, in which the intensity of th...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2008-1025751

    authors: Aura O,Komi PV

    更新日期:1986-06-01 00:00:00

  • Physiological predictors of maximum treadmill walking performance in patients with intermittent claudication.

    abstract::The purpose of this investigation was to identify physiological predictors of maximum treadmill walking performance (MWD) in patients with intermittent claudication. Forty-five claudicants performed a graded treadmill test to determine MWD, peak oxygen uptake, and gas exchange threshold. Calf muscle oxygenation (StO (...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0028-1111110

    authors: Tew GA,Nawaz S,Blagojevic M,Zwierska I,Saxton JM

    更新日期:2009-06-01 00:00:00

  • GNAS A-1121G variant is associated with improved diastolic dysfunction in response to exercise training in heart failure patients.

    abstract::β1-adrenergic receptors (ADRB1) and Gαs proteins (GNAS) play important roles in the regulation of cardiac function. The present study sought to investigate whether ADRB1 Arg389Gly (rs1801253), GNAS -1211 G/A (rs6123837) and GNAS 2291 C/T (rs6026584) variants are associated with left ventricular function and exercise t...

    journal_title:International journal of sports medicine

    pub_type: 临床试验,杂志文章

    doi:10.1055/s-0032-1316365

    authors: Alves AJ,Goldhammer E,Ribeiro F,Eynon N,Ben-Zaken Cohen S,Duarte JA,Viana JL,Sagiv M,Oliveira J

    更新日期:2013-03-01 00:00:00

  • Field evaluation of the Computer Science and Application's Inc. Activity monitor during running and skating training in adolescent athletes.

    abstract::This study investigated the validity of the CSA activity monitor for assessment of the total amount of physical activity in adolescent athletes. Activity data were compared to data on daily energy expenditure and its derivatives measured by the doubly labeled water method. Seven athletes (speed skaters) with a mean ag...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2000-8487

    authors: Ekelund U,Yngve A,Sjöström M,Westerterp K

    更新日期:2000-11-01 00:00:00

  • The Effect of Caffeine Ingestion during Evening Exercise on Subsequent Sleep Quality in Females.

    abstract::In a randomised, double-blind, placebo-controlled crossover design, 10 females taking monophasic oral contraceptives completed 90 min intermittent treadmill-running 45 min after ingestion of 6 mg∙kg(-1) body mass anhydrous caffeine or artificial sweetener (placebo). Water (3 mL∙kg(-1)) was provided every 15 min during...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章,随机对照试验

    doi:10.1055/s-0034-1398580

    authors: Ali A,O'Donnell JM,Starck C,Rutherfurd-Markwick KJ

    更新日期:2015-06-01 00:00:00

  • Plantar flexion torque as a function of time of day.

    abstract::The possible peripheral and/or central origin in the mechanisms responsible for day-time fluctuation in maximal torque of the triceps surae muscle were investigated with a special emphasis on antagonist muscle coactivation. Eleven healthy male subjects (physical education students) took part in this investigation. The...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2005-837618

    authors: Guette M,Gondin J,Martin A,Pérot C,Van Hoecke J

    更新日期:2006-03-01 00:00:00

  • Exercise training and cytokines in breast cancer survivors.

    abstract::The purpose of this randomized controlled trial was to determine the effects of an 8-week (aerobic+strength) exercise training program (3 sessions/week) on the circulating cytokine levels of breast cancer survivors. We randomly allocated 16 female survivors of breast cancer (mean±SD age: 50±5 years) to an intervention...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章,随机对照试验

    doi:10.1055/s-0031-1271697

    authors: Gómez AM,Martínez C,Fiuza-Luces C,Herrero F,Pérez M,Madero L,Ruiz JR,Lucia A,Ramírez M

    更新日期:2011-06-01 00:00:00

  • Determination of E-rosette-forming lymphocytes in aged subjects with Taichiquan exercise.

    abstract::T-lymphocytes were determined by rosette formation with sheep erythrocytes in the peripheral blood obtained from 30 healthy aged subjects who were practicing Taichiquan (88 style) exercise and 30 age-matched normal aged who served as a control group. At rest the total number of T-lymphocytes and the number of active T...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:

    authors: Sun XS,Xu Y,Xia YJ

    更新日期:1989-06-01 00:00:00

  • Dietary sodium intake and changes in plasma volume during short-term exercise training.

    abstract::This study was a retrospective examination of the relationship between estimated dietary sodium intake and training-induced changes in plasma volume (PV). It was undertaken to explore one possible explanation for the large individual differences in PV shifts accompanying 3 d of endurance cycling. Ten healthy males rod...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-2007-973033

    authors: Luetkemeier MJ

    更新日期:1995-10-01 00:00:00

  • Exercise reduces effects of creatine on lung.

    abstract::We recently demonstrated that creatine supplementation increased some features of lung allergic sensitization in mice. On the other hand, other studies have shown that aerobic exercise inhibited allergic airway inflammation and remodeling. We hypothesized that aerobic exercise may decrease the exacerbatory effects of ...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0029-1224176

    authors: Vieira RP,Duarte AC,Santos AB,Medeiros MC,Mauad T,Martins MA,Carvalho CR,Dolhnikoff M

    更新日期:2009-09-01 00:00:00

  • Body Composition and Visceral Adipose Tissue in Female Collegiate Equestrian Athletes.

    abstract::To examine measures of total and regional body composition using dual X-ray absorptiometry (DXA) in NCAA Division I collegiate equestrian athletes, 31 female collegiate equestrian athletes were matched to a population of normal controls by age and body mass index. Total and regional fat tissue mass (FM), lean tissue m...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/a-0863-4607

    authors: Dengel OH,Raymond-Pope CJ,Bosch TA,Oliver JM,Dengel DR

    更新日期:2019-05-01 00:00:00

  • Vibration effects on static balance and strength.

    abstract::The purpose of this study was to investigate the effects of a vibration training protocol and a conventional strength training program consisting of similar exercises on knee extensors and flexors strength and postural sway in middle-aged women. 38 women were randomly assigned into a Vibration Group (n=12, static and ...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章,随机对照试验

    doi:10.1055/s-0030-1249618

    authors: Spiliopoulou SI,Amiridis IG,Tsigganos G,Economides D,Kellis E

    更新日期:2010-09-01 00:00:00

  • Effects of long-term aerobic exercise on EPOC.

    abstract::This study sought to determine the influence of 16 months of progressive aerobic exercise on excess postexercise oxygen consumption (EPOC) and the extent EPOC contributed to weight management. Twenty-five overweight/obese women and 16 overweight/obese men participated in a 16-month exercise program (moderate-intensity...

    journal_title:International journal of sports medicine

    pub_type: 临床试验,杂志文章

    doi:10.1055/s-2007-965111

    authors: LeCheminant JD,Jacobsen DJ,Bailey BW,Mayo MS,Hill JO,Smith BK,Donnelly JE

    更新日期:2008-01-01 00:00:00

  • A Comparison of Methods for the Estimation of Body Composition in Highly Trained Wheelchair Games Players.

    abstract::The purpose of this study was to assess the agreement in body composition measurements of wheelchair athletes using skinfolds, bio-impedance analysis (BIA) and air displacement plethysmography (ADP) relative to dual-energy X-ray absorptiometry (DXA). A secondary objective was to develop new skinfold prediction equatio...

    journal_title:International journal of sports medicine

    pub_type: 杂志文章

    doi:10.1055/s-0042-104061

    authors: Goosey-Tolfrey V,Keil M,Brooke-Wavell K,de Groot S

    更新日期:2016-09-01 00:00:00