Abstract:
:During rowing, the respiratory musculature is confronted with dual demands: assisting the propulsive force generation and as the effector for ventilatory control. We determined the pulmomechanical and breathing pattern features of rowing-induced hyperpnea in five national class rowers (18 years old). Each subject performed incremental exercise on a mechanically braked rowing ergometer. Power was increased by 50 W each 3 min, from 150 W to 350 W. Breathing was through a low-resistance, ultrasonic flow-sensing device. Respired gas concentrations were measured by mass spectrometry. Intrapleural pressure (Pp1) was monitored by an esophageal balloon. Ventilation (VE) increased by increasing tidal volume (VT) at constant breathing frequency (fb). Above approximately 701.min-1 there was little change in VT and further increase in VE was dominated by fb. Two breathing patterns were identified: (1) one expiration per stroke and one inspiration during recovery and (2) one complete breath during stroke and one breath during recovery. Stroke frequency (fs) and fb increased in concert, i.e., all subjects entrained their breathing. Pp1 indicated dynamic airway compression during exhalation at high work rates and also that VT did encroach upon the flat part of the compliance curve. With the constrained VT, the demand for increased fb to effect the hyperpneic response at high work rates may result in an entrainment of the stroke frequency to that of breathing.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Steinacker JM,Both M,Whipp BJdoi
10.1055/s-2007-1021217subject
Has Abstractpub_date
1993-09-01 00:00:00pages
S15-9eissn
0172-4622issn
1439-3964journal_volume
14 Suppl 1pub_type
杂志文章abstract::The relationships between perceived exertion and the physiological variables oxygen uptake (VO2), heart rate (HR) and blood lactate concentration (HLa) were studied in tethered swimming. Seven male and ten female subjects swam at five submaximal intensities. The degree of perceived exertion was measured both on the ca...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-973025
更新日期:1995-08-01 00:00:00
abstract::The oxygen uptake (VO2) attained during a constant speed 800-m pace trial on a treadmill is less than the maximal VO2 (VO2max) in male middle-distance runners with a high VO2max (i.e., > 65 ml x kg (-1) x min (-1)). We therefore investigated whether the VO2 attained was influenced by the pacing strategy adopted. Eight...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2005-837468
更新日期:2006-01-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/a-0577-3722
更新日期:2018-07-01 00:00:00
abstract::A prospective study of acute injuries from sports and physical exercise was carried out during 1 year in a total population of a municipality with 31,620 inhabitants. Data on exposure were collected: the number of participants in each sport, the hours of participation, and number of weeks in the season per year. The n...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1025052
更新日期:1988-12-01 00:00:00
abstract::Alpine spelunking is practiced in darkness, isolation, cold and high humidity. In this paper we study the acute haematological effects of prolonged strenuous activity in five spelunkers who spent about 20 hours in a 700-meter deep cave without resting much or sleeping. On four occasions, we measured their red cell cou...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-964978
更新日期:2007-09-01 00:00:00
abstract::This study evaluated the effect of ischemic preconditioning (IPC) on resistance exercise performance in upper limbs. After 12-RM load determination, 21 men attended 4 trials separated by 3 days in a randomized crossover design: IPC (4×5-min occlusion 220 mmHg/reperfusion 0 mmHg) in arms and in thighs, and SHAM (equal ...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0042-109066
更新日期:2016-09-01 00:00:00
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
更新日期:2013-03-01 00:00:00
abstract::There is a potential need for the official criterion of testosterone abuse in sport (the urinary concentration ratio of testosterone glucuronide/epitestosterone glucuronide, TG/EG > 6) to be backed-up by some complementary markers, more particularly in cases of physiologically high TG/EG and when there is suspicion of...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-972853
更新日期:1996-07-01 00:00:00
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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-2007-1021156
更新日期:1993-04-01 00:00:00
abstract::Sports influence the hypothalamus-pituitary-gonadal axis (HPG). The purpose of this study was to analyze the effects of physical stress on qualitative male LH secretion. We evaluated the HPG axis at rest and the LH response to a treadmill exercise (90 % of Vdot;O 2 max) in eight trained (running 50 to 70 km/week) and ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2002-33149
更新日期:2002-07-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0034-1394394
更新日期:2015-04-01 00:00:00
abstract::It has been suggested in previous studies that the difference in endurance performance between males and females is related to gender-specific differences in cardiac function. Other studies have not equated males and females for physical condition, and this may have contributed to the findings. The purpose of this stu...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024696
更新日期:1991-08-01 00:00:00
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
更新日期:2004-07-01 00:00:00
abstract::In major track and field competitions, the most risky discipline is the combined event. Therefore, we aimed to record and analyze the incidence and characteristics of sports injuries incurred during the Youth and National Combined Events Championships. During the French Athletics Combined Events Championships in 2010,...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0031-1301332
更新日期:2012-10-01 00:00:00
abstract::The aim of this study was to test the validity and the reliability of the G-Cog which is a new BMX powermeter allowing for the measurements of the acceleration on X-Y-Z axis (250 Hz) at the BMX rear wheel. These measurements allow computing lateral, angular, linear acceleration, angular, linear velocity and the distan...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0032-1304639
更新日期:2013-11-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-989440
更新日期:2008-08-01 00:00:00
abstract::We investigated the effects of hypoxia on matched-severe intensity exercise and on the parameters of the power-duration relationship. Fifteen trained subjects performed in both normoxia and normobaric hypoxia (FiO2=0.13, ~3000 m) a maximal incremental test, a 3 min all-out test (3AOT) and a transition from rest to an ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/a-1236-3953
更新日期:2021-01-18 00:00:00
abstract::The electromyographic (EMG) activity of seven muscles of the trunk and lower extremity in five male masters level ski racers during a slalom turn in both alpine skiing and in-line skating was recorded using a telemetry system. Measurements were made on separate testing days using slopes commonly used in each activity ...
journal_title:International journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1055/s-2007-971943
更新日期:1998-10-01 00:00:00
abstract::The purpose of this study was to compare acute mechanical and metabolic effects of 2 sessions of resistance training equated by volume and total resting time but with different set configuration: sets to failure (FS) vs. distribution of rest between each repetition (NFS). 10 male judoists completed a session consistin...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0031-1299699
更新日期:2012-05-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1055/s-2000-1447
更新日期:2000-05-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0032-1316317
更新日期:2013-03-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0029-1243254
更新日期:2010-03-01 00:00:00
abstract::Pulse oximetry allows non-invasive monitoring of arterial oxygen saturation (SO2). To study the validity of pulse oximetry, comparative measurements were performed. During exhaustion limited exercise SO2-values measured by pulse oximetry (SO2puls), calculated SO2-values (algorithms of Kelman, Severinghaus, and Siggaar...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024756
更新日期:1990-02-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2003-38205
更新日期:2003-02-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0032-1321799
更新日期:2013-06-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2003-45231
更新日期:2004-01-01 00:00:00
abstract::In the last decade the study of the human muscle mechanics and energetics in physiology and pathology underwent a radical change. Indeed, the use of biopsy is being progressively accompanied by non-invasive techniques which allow a more integrative assessment of muscle function in vivo. Magnetic resonance imaging (MRI...
journal_title:International journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1055/s-2007-972724
更新日期:1997-10-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0033-1345130
更新日期:2013-12-01 00:00:00
abstract::To understand the influence of gender on oxygen consumption of respiratory muscles (VO(2)resp), 32 healthy subjects participated in the study (16 males, 16 females). They were divided into four groups: young males, young females, older males and older females. We used a closed circuit device which allowed a continuous...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2003-43267
更新日期:2003-11-01 00:00:00
abstract::It has been asserted that the consumption of oxygenated water can support physical working capacity. As this has not been accurately investigated yet we analyzed effects of a two-week period of daily O2-water ingestion on spiroergometric parameters and lactate metabolism in healthy adults. Twenty men (24 +/- 2.5 years...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2005-865633
更新日期:2006-03-01 00:00:00