Abstract:
:This study aimed to describe and compare the ventilation behavior during an incremental test utilizing three mathematical models and to compare the feature of ventilation curve fitted by the best mathematical model between aerobically trained (TR) and untrained (UT) men. Thirty five subjects underwent a treadmill test with 1 km·h(-1) increases every minute until exhaustion. Ventilation averages of 20 seconds were plotted against time and fitted by: bi-segmental regression model (2SRM); three-segmental regression model (3SRM); and growth exponential model (GEM). Residual sum of squares (RSS) and mean square error (MSE) were calculated for each model. The correlations between peak VO2 (VO2PEAK), peak speed (SpeedPEAK), ventilatory threshold identified by the best model (VT2SRM) and the first derivative calculated for workloads below (moderate intensity) and above (heavy intensity) VT2SRM were calculated. The RSS and MSE for GEM were significantly higher (p < 0.01) than for 2SRM and 3SRM in pooled data and in UT, but no significant difference was observed among the mathematical models in TR. In the pooled data, the first derivative of moderate intensities showed significant negative correlations with VT2SRM (r = -0.58; p < 0.01) and SpeedPEAK (r = -0.46; p < 0.05) while the first derivative of heavy intensities showed significant negative correlation with VT2SRM (r = -0. 43; p < 0.05). In UT group the first derivative of moderate intensities showed significant negative correlations with VT2SRM (r = -0.65; p < 0.05) and SpeedPEAK (r = -0.61; p < 0.05), while the first derivative of heavy intensities showed significant negative correlation with VT2SRM (r= -0.73; p< 0.01), SpeedPEAK (r = -0.73; p < 0.01) and VO2PEAK (r = -0.61; p < 0.05) in TR group. The ventilation behavior during incremental treadmill test tends to show only one threshold. UT subjects showed a slower ventilation increase during moderate intensities while TR subjects showed a slower ventilation increase during heavy intensities. Key pointsThe increase of ventilation during incremental exercise tends to show only one metabolic transition point.The presence of a threshold process or a continuous process in ventilation during incremental exercise seems to be only a methodological matter.The ventilatory efficiency can be employed to distinguish trained than untrained subjects once this index is associated with aerobic parameters. When analyzed the whole curve, trained subjects show a better ventilatory efficiency at heavy intensities and untrained subjects show a better ventilatory efficiency at moderate intensities.
journal_name
J Sports Sci Medjournal_title
Journal of sports science & medicineauthors
Pires FO,Lima-Silva AE,Oliveira EN,Rumenig-Souza E,Kiss MAsubject
Has Abstractpub_date
2008-09-01 00:00:00pages
335-43issue
3issn
1303-2968journal_volume
7pub_type
杂志文章abstract::Despite its prevalence and significance, late life depression is underrecognized and undertreated. This study aimed to investigate the effect of a long-term exercise intervention on depressive symptoms in older Korean women. Thirty older women were assigned to exercise (n = 15, age of 80.8 ± 3.8 years) or control grou...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2019-08-01 00:00:00
abstract::The aim of the present study was to investigate the effect of a 14-week dynamic Whole-Body Electrostimulation (WB-EMS) training program on muscular strength, soccer relevant sprint, jump and kicking velocity performance in elite soccer players during competitive season. Twenty-two field-players were assigned to 2 grou...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2016-12-01 00:00:00
abstract::The purpose of this study was to examine, first, the movement actions performed during two different small-sided games and, second, their effects on a series of field endurance and technical tests. Thirty-four young soccer players (age: 13 ± 0.9 yrs; body mass: 62.3 ± 15.1 kg; height: 1.65 ± 0.06 m) participated in th...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-09-01 00:00:00
abstract::Motor coordination and physical fitness are multidimensional concepts which cannot be reduced to a single variable. This study evaluated multivariate relationships among morphology, physical fitness and motor coordination in 74 pre-pubertal girls 8.0-8.9 years of age. Data included body dimensions, eight fitness items...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2018-05-14 00:00:00
abstract::The purpose of this study was to investigate the mechanical similarity between net joint moments (NJM) of the countermovement jump (CMJ) and the hang power clean (HPC) and jump shrug (JS). Twelve male Lacrosse players performed three maximal effort CMJs and three repetitions of the HPC and JS at 30%, 50%, and 70% of t...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2019-11-19 00:00:00
abstract::The aims of the study were to determine whether heart rate variability (HRV) measured at rest and during exercise could be altered by an exercise training programme designed to increase walking performance in patients with peripheral arterial disease. Forty-four volunteers were randomised into 12 weeks of either: supe...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2007-12-01 00:00:00
abstract::Until recently, measurement and evaluation in sport science, especially agility testing, has not always included key elements of proper test construction. Often tests are published without reporting reliability and validity analysis for a specific population. The purpose of the present study was to examine the test re...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2017-03-01 00:00:00
abstract::The aim of this study was to evaluate the influence of contextual factors on game styles in professional soccer. Interactions between styles and different playing venues, opposition quality, total match goals, and competing styles, were investigated using logistic regression and odds ratios. Game styles were character...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2020-02-24 00:00:00
abstract::The present study aimed to clarify the asymmetry between the dominant (DL) and non-dominant takeoff legs (NDL) in terms of lower limb behavior during running single leg jumps (RSJ) in collegiate male basketball players in relation to that of the jump height. Twenty-seven players performed maximal RSJ with a 6 m approa...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2014-12-01 00:00:00
abstract::This study aimed to compare the effect of different static stretching durations followed by dynamic stretching on repeated sprint ability (RSA) and change of direction (COD). Twenty-five participants performed the RSA and COD tests in a randomized order. After a 5 min aerobic warm up, participants performed one of the...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2011-06-01 00:00:00
abstract::For the past 50 years anabolic steroids have been at the forefront of the controversy surrounding performance enhancing drugs. For almost half of this time no attempt was made by sports governing bodies to control its use, and only recently have all of the major sports governing bodies in North America agreed to ban f...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章,评审
doi:
更新日期:2006-06-01 00:00:00
abstract::The purpose of this study was to investigate the reliability of the Aerobic Power Index (API) submaximal cardiorespiratory exercise test, as well as associated variables of oxygen uptake (ml·kg(-1)·min(-1)) and ratings of perceived exertion (RPE) in cancer patients who are generally unable to complete maximal or lengt...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2012-12-01 00:00:00
abstract::It is known that impact forces increase with running velocity as well as when stride length increases. Since stride length naturally changes with changes in submaximal running velocity, it was not clear which factor, running velocity or stride length, played a critical role in determining impact characteristics. The a...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2005-06-01 00:00:00
abstract::The purpose of this research was to identify the jump kinetic determinants of sprint acceleration performance from a block start. Ten male (mean ± SD: age 20 ± 3 years; height 1.82 ± 0.06 m; weight 76.7 ± 7.9 kg; 100 m personal best: 10.87 + 0.36 s {10.37 - 11.42}) track sprinters at a national and regional competitiv...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2006-06-01 00:00:00
abstract::Female breasts are vulnerable to direct blows or frictional injuries during sport; however, little research has investigated breast injuries experienced by female athletes. This study aimed to investigate the occurrence, causes and perceived performance effects of breast injuries in elite female athletes across a wide...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2019-08-01 00:00:00
abstract::The aims of the present study were to compare the consistency in the lower limb acceleration patterns during inside and instep kicks performed by players with different skill levels, and to investigate the correlation between subjective rating scores for skill level relative to their kicking performance and knee accel...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2010-09-01 00:00:00
abstract::The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors static-stretching (SS) on the passive range of movement (ROM) of the stretched limb, surface electromyography (sEMG) and single-leg bounce drop jump (SBDJ) performance measures of the ipsilateral stretched and contralateral non...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2015-05-08 00:00:00
abstract::The central nervous system plays a crucial role in fatigue during endurance exercise. Branched-chain amino acids (BCAA) could reduce cerebral serotonin synthesis by competing with its precursor tryptophan for crossing the blood brain barrier. Arginine and citrulline could prevent excess hyperammonemia accompanied by B...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2016-08-05 00:00:00
abstract::The Wingate all-out test (WAT) is commonly used to estimate anaerobic capabilities of athletes by using an upper or lower body cycle ergometer, however, a new test modality called elliptical all-out test (EAT) which measures activated whole-body locomotor tasks has recently been proposed. The purpose of this study was...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2013-09-01 00:00:00
abstract::We investigated the change of body composition in ultra- endurance runners during a multi-stage ultra-endurance run, the Isarrun 2006 in Bavaria, Germany, where athletes had to run 338 km within 5 days. Body mass, skin fold thicknesses and circumferences of extremities were measured in 21 well-experienced extreme endu...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2007-12-01 00:00:00
abstract::The Tuck Jump Assessment (TJA) is a clinician-friendly screening tool that was designed to support practitioners with identification of neuromuscular deficits associated with anterior cruciate ligament injury. This study aimed to evaluate the inter- and intra-rater reliability of the modified scoring (0 to 2) TJA to a...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2017-03-01 00:00:00
abstract::The primary purpose of this research was to compare the impact characteristics of Taekwondo (TKD) and Yongmudo (YMD) player's turning kick according to the target height. 5 highly skilled YMD and 5 TKD players participated in this study. To measure the impact force, two accelerometers were fixed to a PVC pipe in a san...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-11-01 00:00:00
abstract::An os acromiale (OA) arises from a fusion failure of the anterior acromial apophysis. This case report presents the successful management of a painful OA associated to rotator cuff impingement in a competitive swimmer, based on ultrasonographic diagnosis and conservative management. Rest from sport activity, oral anti...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2012-06-01 00:00:00
abstract::This study compared stride length, stride frequency, contact time, flight time and foot-strike patterns (FSP) when running barefoot, and in minimalist and conventional running shoes. Habitually shod male athletes (n = 14; age 25 ± 6 yr; competitive running experience 8 ± 3 yr) completed a randomised order of 6 by 4-mi...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2014-05-01 00:00:00
abstract::Mountain endurance running has increased in popularity in recent years. Thus the aim of the present study was to determine if maximal oxygen uptake (VO2max) and energy cost of running (Cr) measured during level and uphill running are associated. Ten high level male endurance mountain runners performed three maximal ox...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2016-05-23 00:00:00
abstract::The objectives of the study were to determine the validity and reliability of peak velocity (PV), average velocity (AV), peak power (PP) and average power (AP) measurements were made using a linear position transducer. Validity was assessed by comparing measurements simultaneously obtained using the Tendo Weightliftin...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2015-03-01 00:00:00
abstract::After lower extremity injury, only half of the injured athletes return to their pre-injury sports level. Even though functional performance tests are often used to make return to sport decisions, it is unknown whether functional performance is associated with return to performance after such injuries. The aim of this ...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2020-08-13 00:00:00
abstract::The presents study investigated the effects of between-set interventions on neuromuscular function of the knee extensors during six sets of 10 isokinetic (120°·s(-1)) maximal concentric contractions separated by three minutes. Twelve healthy men (age: 23.9 ± 2.4 yrs) were tested for four different between-set recovery...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2011-12-01 00:00:00
abstract::The presentation of unhealthy psychological symptoms are rising sharply in adolescents. Detrimental lifestyle behaviours are proposed as both possible causes and consequences. This study set out to compare selected measures of quality and quantity of movement between adolescents with and without unhealthy psychologica...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2020-05-01 00:00:00
abstract::Extrapolation from post-exercise measurements has been used to estimate respiratory and blood gas parameters during exercise. This may not be accurate in exercise with reduced breathing frequency (RBF), since spontaneous breathing usually follows exercise. This study was performed to ascertain whether measurement of o...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-09-01 00:00:00