Abstract：
:The aim of this study was to quantify the influence of head-up-tilt (HUT) on the isocapnic hypoxic ventilatory response (HVR) in man, and to investigate the effect of orthostatic blood shifts separately from other gravitational effects by the application of lower-body negative pressure (LBNP) with subjects in a horizontal position. HVR was measured in 15 subjects during passive HUT from 0 degrees to 85 degrees as well as during -7 degrees head-down-tilt and while they were in a sitting position. In a subgroup of eight subjects the effect of 85 degrees HUT was compared to a corresponding LBNP of -70 mbar on HVR. Moreover, by imposing graded HUT (7 degrees, 15 degrees, 30 degrees, 50 degrees) and LBNP (-15, -30 mbar) we studied the effect of low-level orthostatic stress on HVR. Ventilation, end-tidal partial pressure of CO2, heart rate and blood pressure were recorded continuously for 1 min before, and during HVR. HVR was significantly increased by approximately equal to 50% through both 85 degrees HUT and -70 mbar LBNP as compared to 0 degrees and 0 mbar, respectively, at unchanged mean arterial pressure. Low-level HUT and LBNP had no effect on HVR. It was concluded that the orthostatic HVR increase may be attributable to caudal blood shifts (i.e., central hypovolemia). This HVR increase requires a pronounced hypovolemic stress but no decrease in arterial blood pressure. It is suggested that a central interaction of arterial and cardiopulmonary baroreceptors is underlying this response. Their separate contribution remains to be assessed.
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
Hildebrandt W,Ottenbacher A,Schuster M,Baisch F,Bärtsch Pdoi
10.1007/s004210050070keywords:
subject
Has Abstractpub_date
2000-04-01 00:00:00pages
470-8issue
6eissn
1439-6319issn
1439-6327journal_volume
81pub_type
杂志文章abstract：:Though conventional wisdom suggests that a rise in blood pressure is a reality of advancing age, in fact, it appears that progressive elevation in sympathetic activity, not necessarily accompanied by increased blood pressure, is intrinsic to cardiovascular aging in humans. The mechanism behind this elevation would see...
journal_title：European journal of applied physiology
pub_type： 杂志文章,评审
doi：10.1007/s00421-013-2731-7
更新日期：2014-03-01 00:00:00
abstract：:We review the literature on whether exercise is a synchroniser of human circadian rhythms, and highlight the specific methodological problems that are associated with this topic. In applied research, exercise has been investigated as a treatment for jet lag and shift-work problems. In these studies, there have been di...
journal_title：European journal of applied physiology
pub_type： 杂志文章,评审
doi：10.1007/s00421-006-0361-z
更新日期：2007-03-01 00:00:00
abstract：:We aimed to gain insight into the role that the transitory increases in anabolic hormones play in muscle hypertrophy with unilateral resistance training. Ten healthy young male subjects (21.8 +/- 0.4 years, 1.78 +/- 0.04 m, 75.6 +/- 2.9 kg; mean +/- SE) engaged in unilateral resistance training for 8 week (3 days/week...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-006-0300-z
更新日期：2006-12-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-020-04382-w
更新日期：2020-07-01 00:00:00
abstract：:The purpose of this study was to determine the impact of high-intensity intermittent exercise on the presence of circulating growth hormone (GH) aggregates measured using two different assay techniques. Six male subjects with endurance training background participated in this study under both exercise and no-exercise ...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-002-0774-2
更新日期：2003-04-01 00:00:00
abstract：:To determine the effects of creatine supplementation during short-term resistance training overreaching on performance, body composition, and resting hormone concentrations, 17 men were randomly assigned to supplement with 0.3 g/kg per day of creatine monohydrate (CrM: n=9) or placebo (P: n=8) while performing resista...
journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s00421-003-1031-z
更新日期：2004-05-01 00:00:00
abstract：:Central hypovolemia induced by orthostatic loading causes reno-vascular changes that can lead to orthostatic intolerance. In this study, we investigated volume regulating hormonal responses and reno-vascular changes in male and female subjects as they underwent central hypovolemia, induced by graded lower body negativ...
journal_title：European journal of applied physiology
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doi：10.1007/s00421-018-4053-2
更新日期：2019-03-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-007-0545-1
更新日期：2007-12-01 00:00:00
abstract：:We have previously shown that Achilles tendon length is related to walking economy on the flat, presumably because of increased stretch-shortening cycle elastic energy savings. In addition, greater walking economy in African American (AA) women compared to European American (EA) women is explained by longer Achilles t...
journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
doi：10.1007/s00421-010-1816-9
更新日期：2011-08-01 00:00:00
abstract：PURPOSE:We investigated the consequence of varying hypoxia severity during an initial set of repeated cycling sprints on performance, neuromuscular fatigability, and exercise-related sensations during a subsequent set of repeated sprints in normoxia. METHODS:Nine active males performed ten 4-s sprints (recovery = 30 s...
journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00421-020-04327-3
更新日期：2020-04-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
doi：10.1007/s004210000234
更新日期：2000-08-01 00:00:00
abstract：:Space flight is a new experience for humans. Humans adapt if not perfectly, rather well to life without gravity. There is a reductive remodeling of the musculo-skeletal system. Protein is lost from muscles and calcium from bones with anti-gravity functions. The observed biochemical and physiological changes reflect th...
journal_title：European journal of applied physiology
pub_type： 杂志文章,评审
doi：10.1007/s00421-012-2548-9
更新日期：2013-09-01 00:00:00
abstract：PURPOSE:Muscular strength is suggested to be dependent upon muscle characteristics. Yet, sex-specific relationships of muscle characteristics to strength in the resistance-trained require investigation. Therefore, the purpose was to evaluate sex differences in muscle characteristics and isometric strength in the elbow ...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-018-3962-4
更新日期：2018-11-01 00:00:00
abstract：:Evidence suggests that strong ions can exist reversibly bound to proteins in a pH-dependent manner and that they can be recruited into the biological solution, modulating its strong ion difference in a process that opposes the acid base disturbances imposed on the system. These recruitable strong ions represent the so...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-010-1803-1
更新日期：2011-08-01 00:00:00
abstract：:The aim of the present study was to compare electromyographic responses during arm exercises with a crank rate chosen spontaneously ( T(S)) or set at 20% below or above ( T(-20), T(+20)) the spontaneously chosen crank rate (SCCR). Ten male physical education students performed arm exercises with intensities ranging fr...
journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
doi：10.1007/s00421-004-1187-1
更新日期：2004-08-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00421-017-3605-1
更新日期：2017-06-01 00:00:00
abstract：:The aim of the present study was to test if the consumption of creatine incorporated in food bars modifies creatine plasma kinetics, erythrocyte retention and loss in urine and in feces when compared with its consumption in the form of an aqueous solution (AS). Seventeen healthy young men ingested 2 g creatine either ...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-007-0558-9
更新日期：2008-01-01 00:00:00
abstract：:A plateau in oxygen consumption (VO(2)) has long been considered the criterion for maximal effort during an incremental exercise test. But, surprisingly, the termination of a maximum exercise test often occurs in the absence of a VO(2) plateau. To explain this inconsistency, some have proposed that an oxygen limitatio...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-003-0845-z
更新日期：2003-08-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-016-3396-9
更新日期：2016-07-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-015-3320-8
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-013-2606-y
更新日期：2013-07-01 00:00:00
abstract：:Equivocal findings have been reported in the few studies that examined the impact of ambient temperature (T a) and hypohydration on cognition and dynamic balance. The purpose of this study was to determine the impact of acute exposure to a range of ambient temperatures (T(a) 10-40 °C) in euhydration (EUH) and hypohydr...
journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00421-012-2506-6
更新日期：2013-04-01 00:00:00
abstract：:The objective of the present study was to relate changes in certain muscle characteristics and indicators of metabolism in response to endurance training to the concomitant changes in time to exhaustion (T(lim)) at a work rate corresponding to maximal oxygen uptake VO(2speak). Eight healthy sedentary subjects pedalled...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-005-1325-4
更新日期：2005-07-01 00:00:00
abstract：PURPOSE:The aim of this study was to investigate the effect of an ultra-marathon on heart rate variability (HRV) and psychometric indices in endurance runners. In addition, we aimed to determine the magnitude of change and subsequent recovery for 7 days following the race. METHODS:Recreationally trained runners (n = 1...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-019-04187-6
更新日期：2019-09-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1007/s004210100395
更新日期：2001-05-01 00:00:00
abstract：:Intermittent hypoxic exposure with exercise training is based on the assumption that brief exposure to hypoxia is sufficient to induce beneficial muscular adaptations mediated via hypoxia-inducible transcription factors (HIF). We previously demonstrated (Mounier et al. Med Sci Sports Exerc 38:1410-1417, 2006) that leu...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-008-0928-y
更新日期：2009-03-01 00:00:00
abstract：:Branched chain amino acids (BCAA), particularly leucine, have been suggested to be ergogenic for both endurance and strength/power performance. This study investigated the effects of dietary leucine supplementation on the exercise performance of outrigger canoeists. Thirteen (ten female, three male) competitive outrig...
journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00421-005-0036-1
更新日期：2006-08-01 00:00:00
abstract：:According to the literature the steady-state level of phosphocreatine (PCr) has a linear relationship to the workload during muscle exercise intensities below the lactate threshold, whereas this linearity is impaired during exercise intensities above the lactate threshold. The purpose of this study was to investigate ...
journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
doi：10.1007/s00421-004-1233-z
更新日期：2005-01-01 00:00:00
abstract：:The effect of outdoor clothing and repeated cold exposure on blood pressure, heart rate, skin temperature, and thermal sensation was studied in 16 young (18-34 years) and 8 middle-aged (35-51 years) normotensive participants. Four winter clothing ensembles were used: regular winter clothing without a hat, with a hat, ...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-009-1176-5
更新日期：2009-12-01 00:00:00
abstract：:The measurement of human muscle size is essential when assessing the effects of training, disuse and ageing. The considered 'gold standard' for cross-sectional area measurements of muscle size is magnetic resonance imaging (MRI). However, MRI is costly and often inaccessible. The aim of the present study was to test t...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-003-0961-9
更新日期：2004-01-01 00:00:00
