Abstract:
:Forearm pain occurring during high +Gz exposure has been linked with vascular distension from elevated transmural pressure of hydrostatic origin and is exacerbated by positive pressure breathing (PBG). We postulated that at high vascular transmural pressure vascular autoregulation might be overcome and be associated with worsened pain. Six volunteers were studied at +4, +5, +6, and +7 Gz on a human centrifuge. Forearm vascular resistance (FVR) was assessed by Doppler ultrasound resistive index (RI), and superficial forearm venous pressure (FVP) was measured via an indwelling catheter. Pain rating was assessed by numerical scale. The left arm was located at heart level (control position), or on the throttle (test position). Runs were completed with and without positive pressure breathing for G protection (PBG); subjects wore full coverage anti-G trousers and chest counter-pressure. In the test position, pain increased with increasing acceleration (P < 0.0001), and was more severe with PBG at +5 Gz and +7 Gz (P < 0.05). FVP rose substantially more in the test than control position (238 +/- 17 mmHg vs. 61 +/- 8 mmHg at +7 Gz, P < 0.0001) but the presence or absence of PBG had no effect on the FVP increase during acceleration in either position. In the test position, RI fell with increasing acceleration above +5 Gz (P < 0.0001), and the fall was greater with PBG (P < 0.05). Forearm pain was thus associated with a decrease in FVR and an increase in vascular transmural pressure. PBG exacerbated forearm pain and prompted a greater fall in RI, but had no effect on FVP response. These findings support FVR but not forearm venous distension in the aetiology of +Gz arm pain.
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
Green ND,Brown MD,Coote JHdoi
10.1007/s00421-007-0465-0subject
Has Abstractpub_date
2007-08-01 00:00:00pages
621-6issue
6eissn
1439-6319issn
1439-6327journal_volume
100pub_type
杂志文章abstract:PURPOSE:This study examined the mechanisms for force and power reduction during and up to 48 h after maximal eccentric contractions of the knee extensor muscles in young men and women. METHODS:13 men (22.8 ± 2.6 years) and 13 women (21.6 ± 2.2 years) performed 150 maximal effort eccentric contractions (5 sets of 30) w...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-017-3599-8
更新日期:2017-06-01 00:00:00
abstract:PURPOSE:The aim of this study was to examine the influence of age on cycling efficiency and sprint power output in well-trained endurance masters athletes. METHODS:The investigation was conducted on 60 healthy well-trained triathletes separated into six separate groups (n = 10) depending on age: 20-29 years old; 30-39...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-014-2977-8
更新日期:2014-12-01 00:00:00
abstract::The chronic fatigue syndrome (CFS) has been shown to be associated with orthostatic intolerance and cardiovascular dysregulation. We investigated the cardiovascular responses to combined orthostatic stress and isometric exercise in adolescents with CFS. We included a consecutive sample of 15 adolescents 12-18 years ol...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-007-0634-1
更新日期:2008-04-01 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
abstract::Yoga induces long-term changes in respiratory function and control. We tested whether it represents a successful strategy for high-altitude adaptation. We compared ventilatory, cardiovascular and hematological parameters in: 12 Caucasian yoga trainees and 12 control sea-level residents, at baseline and after 2-week ex...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-006-0373-8
更新日期:2007-03-01 00:00:00
abstract:PURPOSE:We investigated the effect of post-exercise sauna bathing on plasma volume (PV) expansion and whether such responses can be tracked by changes in heart rate (HR)-based measures. METHODS:Seven, well-trained male cyclists were monitored for 35 consecutive days (17 days baseline training, 10 days training plus sa...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-014-3060-1
更新日期:2015-04-01 00:00:00
abstract::Using an improved Peronnet-Thibault model to analyse the maximal power available during exercise, it was found that a 3rd-order relaxation process for the decreasing dynamics of aerobic power can describe accurately the data available for world track records and aerobic-to-total energy ratio (ATER). It was estimated t...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-001-0555-3
更新日期:2002-04-01 00:00:00
abstract:PURPOSE:Autonomic assessment might be useful in training management. We planned to assess whether oscillatory metrics of RR variability (such as LFnu) would be more efficient than static indices from low order statistics (RR variance) at discriminating laying rest from stand posture, as an analog of a shift to sympathe...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-016-3337-7
更新日期:2016-04-01 00:00:00
abstract::We investigated changes in the P100 latency of the visual evoked potential (VEP) and the saccadic reaction time (SRT) in relation to the degree of activity of the shoulder girdle elevators. Muscle force was set in 10% increments from 0% to 50% of the maximal voluntary contraction (MVC). The VEP was derived from a midl...
journal_title:European journal of applied physiology
pub_type: 临床试验,杂志文章
doi:10.1007/s00421-004-1151-0
更新日期:2004-08-01 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:PURPOSE:Oral L-citrulline (Cit) increases plasma L-arginine (Arg) concentration and the production of nitric oxide (NO). NO dilates blood vessels and potentially improves sports performance. The combination of oral Arg and Cit (Arg + Cit) immediately and synergistically increases plasma Arg and nitrite/nitrate (NOx) co...
journal_title:European journal of applied physiology
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00421-019-04097-7
更新日期:2019-05-01 00:00:00
abstract:PURPOSE:The prevalence of lifestyle diseases has escalated, and effective exercise training programmes are warranted. This study tested the hypothesis that regular participation in small-sided team handball training could provide beneficial health effects on cardiovascular, skeletal, and muscular parameters in young ad...
journal_title:European journal of applied physiology
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00421-018-4034-5
更新日期:2019-02-01 00:00:00
abstract:PURPOSE:Standing workstations have recently been promoted as a healthy alternative to sitting. However, it is unknown how prolonged standing affects arterial stiffness, a prognostic indicator of cardiovascular health. The purpose of this study was twofold: to observe changes in arterial stiffness, as assessed by pulse ...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-018-3956-2
更新日期:2018-10-01 00:00:00
abstract::The measurement of endurance time ( t(lim)) is the procedure commonly used to quantify the ability of a muscle to maintain force. The relationship between surface electromyographic (sEMG) manifestations of localised muscle fatigue and t(lim) during an effort at 50% of maximal voluntary isometric torque of the knee ext...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-002-0645-x
更新日期:2002-10-01 00:00:00
abstract::Cardiovascular autonomic function is associated with physical performance and exercise training adaptation. The association between physical performance and sympathetic regulation is not well known. We hypothesized that sympathetic nervous system activity is associated with physical performance among male runners. The...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-007-0618-1
更新日期:2008-03-01 00:00:00
abstract::The force generated during a maximal voluntary contraction (MVC) is known to increase by resistance training. Although this increase cannot be solely attributed to changes in the muscle itself, many studies examining muscle activation at peak force failed to detect neural adaptations with resistance training. However,...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-006-0380-9
更新日期:2007-04-01 00:00:00
abstract:PURPOSE:Acute breath-holding deprives the human body from oxygen. In an effort to protect the brain, the diving response is initiated, coupling several physiological responses. The aim of this study was to describe the physiological responses to apnea at the cardiac, peripheral and cerebral level. METHODS:31 physicall...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-020-04445-y
更新日期:2020-10-01 00:00:00
abstract::The compound muscle action potential (M wave) has been commonly used to assess the peripheral properties of the neuromuscular system. More specifically, changes in the M-wave features are used to examine alterations in neuromuscular propagation that can occur during fatiguing contractions. The utility of the M wave is...
journal_title:European journal of applied physiology
pub_type: 杂志文章,评审
doi:10.1007/s00421-017-3788-5
更新日期:2018-03-01 00:00:00
abstract::Local muscle fatigue can originate from both peripheral and central factors. The relative contribution of these factors in the course of a fatiguing contraction in 20 healthy subjects was determined. While subjects made a 2-min sustained maximal voluntary contraction (MVC) of the biceps brachii, muscle fibre conductio...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-003-0913-4
更新日期:2003-11-01 00:00:00
abstract::Coordination of the respiratory rhythm with the rhythm of limb movements has often been observed during rhythmical exercise (e.g. in locomotion). It is usually associated with changes in the respiratory time course, but not in the locomotor rhythm. Therefore, we hypothesised that in walking, the extent of coordination...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s004210000224
更新日期:2000-07-01 00:00:00
abstract::We compared the cardiorespiratory response and muscle recruitment [as determined by electromyography (EMG)] of 37 McArdle patients [19 males, 37.4 ± 2.8 years, body mass index (BMI): 25.1 ± 4.7 kg m(-2)] and 33 healthy controls (18 males, 36.4 ± 10.0 years, BMI: 25.7 ± 3.8 kg m(-2)) during cycle-ergometer exercise (an...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-010-1585-5
更新日期:2010-11-01 00:00:00
abstract::Iron plays a significant role in the body, and is specifically important to athletes, since it is a dominant feature in processes such as oxygen transport and energy metabolism. Despite its importance, athlete populations, especially females and endurance athletes, are commonly diagnosed with iron deficiency, suggesti...
journal_title:European journal of applied physiology
pub_type: 杂志文章,评审
doi:10.1007/s00421-019-04157-y
更新日期:2019-07-01 00:00:00
abstract::Beta-hydroxy-beta-methylbutyrate (HMB) is a metabolite derived from leucine. The anti-catabolic effect of HMB is well documented but its effect upon skeletal muscle strength and fatigue is still uncertain. In the present study, male Wistar rats were supplemented with HMB (320 mg/kg per day) for 4 weeks. Placebo group ...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-011-2224-5
更新日期:2012-07-01 00:00:00
abstract::In the past two decades oxygenation responses to incremental ramp exercise, measured non-invasively by means of near-infrared spectroscopy at different locations in the body, have advanced the insights on the underpinning mechanisms of the whole-body pulmonary oxygen uptake ([Formula: see text]) response. In healthy s...
journal_title:European journal of applied physiology
pub_type: 杂志文章,评审
doi:10.1007/s00421-016-3468-x
更新日期:2016-12-01 00:00:00
abstract::Information concerning the validity and reliability of commercial on-line gas analysis systems is limited. The aim of this study was to provide a comparison of the validity and reliability of three on-line systems (Oxycon Alpha, Oxycon Pro and Pulmolab EX670) with that of Douglas bags. Two separate studies were conduc...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-001-0572-2
更新日期:2002-03-01 00:00:00
abstract::The present study examined the effect of hyperbaric oxygen (HBO) on the formation of 2,3-dihydroxybenzoic acid (2,3-DHBA) and 2,5-dihydroxybenzoic acid (2,5-DHBA), the products of salicylate trapping of hydroxyl free radicals, and glutamate release in the striatum during acute ischemia and reperfusion. Non-HBO rats (n...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-009-1229-9
更新日期:2010-02-01 00:00:00
abstract::Acute physical exercise may affect cardiac autonomic modulation hours or even days during the recovery phase. Although sleep is an essential recovery period, the information on nocturnal autonomic modulation indicated by heart rate variability (HRV) after different exercises is mostly lacking. Therefore, this study in...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-011-2034-9
更新日期:2012-03-01 00:00:00
abstract::The aim of this study was to use the rat moderate spinal cord contusion model to investigate the effects of incomplete spinal cord injury (SCI) on the muscle regeneration process, comparing regeneration of slow-twitch plantarflexor soleus muscle and fast-twitch dorsiflexor tibialis anterior (TA) muscle. Additionally, ...
journal_title:European journal of applied physiology
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00421-012-2429-2
更新日期:2013-01-01 00:00:00
abstract:PURPOSE:Exercise is beneficial to type-2 diabetes-mellitus (T2DM), and there is evidence showing that one of those benefits include a higher expression of brain-derived neurotrophic factor (BDNF), which has been implicated in improving fat oxidation and cognitive development. The deleterious effect of prolonged sedenta...
journal_title:European journal of applied physiology
pub_type: 杂志文章
doi:10.1007/s00421-020-04568-2
更新日期:2021-01-02 00:00:00
abstract::Major sporting events are often held in hot and humid environmental conditions. Cooling techniques have been used to reduce the risk of heat illness following exercise. This study compared the efficacy of five cooling techniques, hand immersion (HI), whole body fanning (WBF), an air cooled garment (ACG), a liquid cool...
journal_title:European journal of applied physiology
pub_type: 临床试验,杂志文章
doi:10.1007/s00421-009-1135-1
更新日期:2009-11-01 00:00:00