Comparison of Heart-Rate-Variability Recording With Smartphone Photoplethysmography, Polar H7 Chest Strap, and Electrocardiography.

abstract：:Apollo 13 was initially looking like it would be the smoothest flight ever. After the explosion of an oxygen tank, however, the astronauts were close to spending the rest of their lives in rotation around the planet. This well-known incident is used to further discuss the link, or lack thereof, between sport-science r...

journal_title：International journal of sports physiology and performance

authors： Buchheit M

更新日期：2017-09-01 00:00:00

abstract：PURPOSE:Caffeine is frequently used by athletes as an ergogenic aid. Various alternate forms of caffeine administration are available, which may produce different effects. This investigation compares the effects of different forms of caffeine supplementation on 5-km running performance, and the relationship between ath...

journal_title：International journal of sports physiology and performance

authors： Whalley PJ,Dearing CG,Paton CD

更新日期：2019-10-11 00:00:00

abstract：PURPOSE:Prior research has illustrated that high volumes of aerobic exercise result in a reduction in basal concentrations of testosterone in men. Those studies were mostly conducted on recreational runners and identified reduced testosterone, but not concentrations low enough to be considered pathological. Therefore, ...

journal_title：International journal of sports physiology and performance

authors： Hooper DR,Kraemer WJ,Stearns RL,Kupchak BR,Volk BM,DuPont WH,Maresh CM,Casa DJ

更新日期：2019-02-01 00:00:00

abstract：PURPOSE:Despite indications of positive effects of sauna (SAU) interventions, effects on performance recovery are unknown. The aim of the current study was to investigate acute effects of SAU bathing after an intensive training session on recovery of swim performance. METHODS:In total, 20 competitive swimmers and tria...

journal_title：International journal of sports physiology and performance

authors： Skorski S,Schimpchen J,Pfeiffer M,Ferrauti A,Kellmann M,Meyer T

更新日期：2019-12-22 00:00:00

abstract：:The aim of the current study was to analyze the temporal effects that unsportsmanlike fouls may have on basketball teams' scoring performance under consideration of context-related variables. The authors analyzed 130 unsportsmanlike fouls from 362 elite basketball games (men's and women's Olympic Games, European and W...

journal_title：International journal of sports physiology and performance

authors： Gómez MÁ,Toro EO,Furley P

更新日期：2016-07-01 00:00:00

abstract：PURPOSE:To investigate the influence of prior knowledge of exercise duration on the pacing strategies employed during game-based activities. METHODS:Twelve semiprofessional team-sport athletes (mean ± SD age 22.8 ± 2.1 y) participated in this study. Players performed 3 small-sided games in random order. In one conditi...

journal_title：International journal of sports physiology and performance

authors： Gabbett TJ,Walker B,Walker S

更新日期：2015-04-01 00:00:00

abstract：PURPOSE:Critical speed (CS) and supra-CS distance capacity (D') are useful metrics for monitoring changes in swimmers' physiological and performance capacities. However, the utility of these metrics across a season has not been systematically evaluated in high level swimmers. METHODS:Twenty-seven swimmers (18 female; ...

journal_title：International journal of sports physiology and performance

authors： Mitchell LJG,Rattray B,Wu P,Saunders PU,Pyne DB

更新日期：2019-07-01 00:00:00

abstract：PURPOSE:To examine the influence of fluid intake on heat acclimation and the subsequent effects on exercise performance following acute hypohydration. METHODS:Participants were randomly assigned to 1 of 2 groups, either able to consume water ad libitum (n = 10; age 23 [3] y, height 1.81 [0.09] m, body mass 87 [13] kg;...

journal_title：International journal of sports physiology and performance

authors： Barley OR,Chapman DW,Mavropalias G,Abbiss CR

更新日期：2020-02-01 00:00:00

abstract：PURPOSE:To determine the reliability of the 505 change-of-direction (COD) test performed with both a stationary and a flying start. METHODS:Fifty-two female netball players (age 23.9 ± 5.4 y, height 169.9 ± 3.3 cm, body mass 65.2 ± 4.6 kg) performed 6 trials of the 505 COD test, 3 with a flying start and 3 with a stat...

journal_title：International journal of sports physiology and performance

authors： Barber OR,Thomas C,Jones PA,McMahon JJ,Comfort P

更新日期：2016-04-01 00:00:00

abstract：PURPOSE:The purpose of this project was to observe current warm-up practices in snowboard athletes and evaluate their physiological impact before competition. METHODS:An observational design was used to monitor 4 athletes (2 female) at an Open National Snowboard Cross Championships. Activity patterns, core temperature...

journal_title：International journal of sports physiology and performance

authors： Sporer BC,Cote A,Sleivert G

更新日期：2012-09-01 00:00:00

abstract：UNLABELLED:Energicer is a new solution which purportedly increases evaporative cooling during exercise in the heat. PURPOSE:To evaluate the effect of Energicer on performance during indoor rowing in a warm environment. METHODS:Eighteen highly trained rowers (age 23.3 ± 6.7 y, height 181.3 ± 6.0 cm, mass 76.7 ± 5.0 kg...

journal_title：International journal of sports physiology and performance

authors： Mujika I,González De Txabarri R,Pyne D

更新日期：2010-09-01 00:00:00

abstract：PURPOSE:To investigate the effects of an extreme uphill marathon on the mechanical parameters that are likely to affect the energy cost of running (Cr). METHODS:Eleven runners (27-59 y) participated in the Etna SuperMarathon (43 km, 0-3063 m above sea level). Anthropometric characteristics, maximal explosive power of ...

journal_title：International journal of sports physiology and performance

authors： Lazzer S,Salvadego D,Taboga P,Rejc E,Giovanelli N,di Prampero PE

更新日期：2015-03-01 00:00:00

abstract：PURPOSE:To quantify the power-output demands of men's road-cycling stage racing using a direct measure of power output. METHODS:Power-output data were collected from 207 races over 6 competition years on 31 Australian national male road cyclists. Subjects performed a maximal graded exercise test in the laboratory to d...

journal_title：International journal of sports physiology and performance

authors： Ebert TR,Martin DT,Stephens B,Withers RT

更新日期：2006-12-01 00:00:00

abstract：PURPOSE:The aim of this study was to describe the pacing profiles used by racewalkers competing in IAAF World Championships. METHODS:The times for each 5-km segment were obtained for 225 men competing over 20 km, 214 women competing over 20 km, and 232 men competing over 50 km, of whom 49 did not finish. Athletes were...

journal_title：International journal of sports physiology and performance

authors： Hanley B

更新日期：2013-07-01 00:00:00

abstract：PURPOSE:The influence of various factors on training-load (TL) responses in basketball has received limited attention. This study aimed to examine the temporal changes and influence of cumulative training dose on TL responses and interrelationships during basketball activity. METHODS:Ten state-level Australian male ju...

journal_title：International journal of sports physiology and performance

authors： Scanlan AT,Fox JL,Borges NR,Dascombe BJ,Dalbo VJ

更新日期：2017-02-01 00:00:00

abstract：OBJECTIVES:To evaluate the current evidence regarding the quantification of cricket fast-bowling skill. METHODS:Studies that assessed fast-bowling skill (bowling speed and accuracy) were identified from searches in SPORTDiscus (EBSCO) in June 2017. The reference lists of identified papers were also examined for releva...

journal_title：International journal of sports physiology and performance

authors： Feros SA,Young WB,O'Brien BJ

更新日期：2018-08-01 00:00:00

abstract：AIM:The purpose of this brief report was to examine the net oxygen cost, oxygen kinetics, and kinematics of level and uphill running in elite ultra-trail runners. METHODS:Twelve top-level ultra-distance trail runners performed two 5-minute stages of treadmill running (level, 0%, men 15 km·h-1, women 13 km·h-1; and uph...

journal_title：International journal of sports physiology and performance

authors： Willis SJ,Gellaerts J,Mariani B,Basset P,Borrani F,Millet GP

更新日期：2019-07-01 00:00:00

abstract：PURPOSE:To assess the utility of a self-paced maximal oxygen uptake (VO2max) test (SPV) in eliciting an accurate measure of VO2max in comparison with a traditional graded exercise test (GXT) during motorized treadmill exercise. DESIGN:This was a cross-sectional experimental study whereby recreationally trained men (n ...

journal_title：International journal of sports physiology and performance

authors： Faulkner J,Mauger AR,Woolley B,Lambrick D

更新日期：2015-01-01 00:00:00

abstract：:The aim of study was to examine the effects of the world's most challenging mountain ultramarathon (Tor des Géants [TdG]) on running mechanics. Mechanical measurements were undertaken in male runners (n = 16) and a control group (n = 8) before (PRE), during (MID), and after (POST) the TdG. Contact (tc) and aerial (ta)...

journal_title：International journal of sports physiology and performance

authors： Degache F,Morin JB,Oehen L,Guex K,Giardini G,Schena F,Millet GY,Millet GP

更新日期：2016-07-01 00:00:00

abstract：PURPOSE:To examine the training and concomitant changes in laboratory- and field-test performance of highly trained endurance runners. METHODS:Fourteen highly trained male endurance runners (mean ± SD maximal oxygen uptake [VO2max] 69.8 ± 6.3 mL · kg-1 · min-1) completed this 1-y training study commencing in April. Du...

journal_title：International journal of sports physiology and performance

authors： Galbraith A,Hopker J,Cardinale M,Cunniffe B,Passfield L

更新日期：2014-11-01 00:00:00

abstract：CONTEXT:Repeat-high-intensity efforts (RHIEs) have recently been shown to occur at critical periods of rugby league matches. PURPOSE:To examine the effect that caffeine has on RHIE performance in rugby league players. METHODS:Using a double-blind, placebo-controlled, crossover design, 11 semiprofessional rugby league...

journal_title：International journal of sports physiology and performance

authors： Wellington BM,Leveritt MD,Kelly VG

更新日期：2017-02-01 00:00:00

abstract：:Purpose: The hyperbolic distance-time relationship can be used to profile running performance and establish critical speed (CS) and D' (the curvature constant of the speed-time relationship). Typically, to establish these parameters, multiple (3+) performance trials are required, which can be highly fatiguing and limi...

journal_title：International journal of sports physiology and performance

authors： Kordi M,Menzies C,Galbraith A

更新日期：2019-05-01 00:00:00

abstract：:The purpose of this study was to compare the pacing profiles between distance- and duration-based trials of short and long duration. Thirteen trained cyclists completed 2 time-based (6 and 30 min) and 2 distance-based (4 and 20 km) self-paced cycling time trials. Participants were instructed to complete each trial wit...

journal_title：International journal of sports physiology and performance

authors： Abbiss CR,Thompson KG,Lipski M,Meyer T,Skorski S

更新日期：2016-11-01 00:00:00

abstract：PURPOSE:To understand the validity of differential ratings of perceived exertion (dRPE) as a measure of girls' training and match internal loads. METHODS:Using the centiMax scale (CR100), session dRPE for breathlessness (sRPE-B) and leg muscle exertion (sRPE-L) were collected across a season of training (soccer, resis...

journal_title：International journal of sports physiology and performance

authors： Wright MD,Songane F,Emmonds S,Chesterton P,Weston M,Mclaren SJ

更新日期：2020-09-18 00:00:00

abstract：:Recent psychophysiological models of endurance performance explained that pacing strategies and exercise-intensity regulation influence cyclists' ability to produce high mean power output (PO) during time trials (TTs). However, the relationships between these pacing strategies and psychological parameters of the athle...

journal_title：International journal of sports physiology and performance

authors： Ouvrard T,Groslambert A,Grappe F

更新日期：2019-04-01 00:00:00

abstract：PURPOSE:To determine the influence the number of contact efforts during a single bout has on running intensity during game-based activities and assess relationships between physical qualities and distances covered in each game. METHODS:Eighteen semiprofessional rugby league players (age 23.6 ± 2.8 y) competed in 3 off...

journal_title：International journal of sports physiology and performance

authors： Johnston RD,Gabbett TJ,Jenkins DG

更新日期：2015-09-01 00:00:00

abstract：PURPOSE:Assessing cardiopulmonary function during swimming is a complex and cumbersome procedure. Backward extrapolation is often used to predict peak oxygen uptake (VO2peak) during unimpeded swimming, but error can derive from a delay at the onset of VO2 recovery. The authors assessed the validity of a mathematical mo...

journal_title：International journal of sports physiology and performance

authors： Chaverri D,Schuller T,Iglesias X,Hoffmann U,Rodríguez FA

更新日期：2016-05-01 00:00:00

abstract：PURPOSE:To assess the effects of different modes of morning (AM) exercise on afternoon (PM) performance and salivary hormone responses in professional rugby union players. METHODS:On 4 occasions (randomized, crossover design), 15 professional rugby players provided AM (~8 AM) and PM (~2 PM) saliva samples before PM as...

journal_title：International journal of sports physiology and performance

authors： Russell M,King A,Bracken RM,Cook CJ,Giroud T,Kilduff LP

更新日期：2016-09-01 00:00:00

abstract：CONTEXT:Successful elite sprint to long-distance runners are known to have shorter ground-contact time (GCT) than their less successful counterparts. PURPOSE:To investigate whether augmented feedback (aF) about GCT can reduce the time on ground (TOG) per minute in long-distance runners and, if so, whether this reducti...

journal_title：International journal of sports physiology and performance

authors： Gilgen-Ammann R,Wyss T,Troesch S,Heyer L,Taube W

更新日期：2018-01-01 00:00:00

abstract：:Hemoglobin mass (tHb) is considered to be a main factor for sea-level performance after "live high-train low" (LHTL) altitude training, but little research has focused on the persistence of tHb following cessation of altitude exposure. The aim of the case study was to investigate short-term effects of various hematolo...

journal_title：International journal of sports physiology and performance

authors： Pottgiesser T,Garvican LA,Martin DT,Featonby JM,Gore CJ,Schumacher YO

更新日期：2012-03-01 00:00:00