Abstract：
:Six men and four women performed, in separate trials, maximal dynamic knee extensions with loads of 15%, 30%, 45% and 60% of maximal isometric knee extension peak torque (MVC). The dynamic extensions were done after postactivation potentiation (PAP) had been induced with a 10-s MVC, and in a control trial without PAP. PAP, measured as the increase in evoked twitch torque, was 53 (4)% (SE) and 43 (3)% at the time of the first and second extensions with each load. PAP failed to increase the attained peak velocity with any load; on the contrary, there was a trend for peak velocity to decrease in the first extension, which occurred approximately equal to 15 s after the 10-s MVC. The results suggest that fatigue produced by the 10-s MVC suppressed any benefit that could be derived from the induced PAP. A surface electromyogram (EMG) recorded from one muscle of quadriceps femoris gave no indication of activation failure in the first knee extension; however, activation impairment specific to the rate of force development cannot be ruled out. It is concluded that the strategy employed, namely of having knee extensions performed soon after the 10-s MVC to maximize PAP at the time of performance, was unsuccessful because there had been insufficient time for recovery from fatigue. It is possible that a longer recovery time, even at the cost of a diminished PAP, may have proved beneficial.
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
Gossen ER,Sale DGdoi
10.1007/s004210000304keywords:
subject
Has Abstractpub_date
2000-12-01 00:00:00pages
524-30issue
6eissn
1439-6319issn
1439-6327journal_volume
83pub_type
杂志文章abstract：:This study was undertaken to determine the cell adhesion molecule profile of CD4+, CD8hi and CD56+ lymphocytes, which are mobilised to and from the peripheral blood during and after prolonged aerobic exercise. Ten healthy males (21-35 years old) were tested on two occasions, separated by at least 14 days. On the first...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s004210000374
更新日期：2001-04-01 00:00:00
abstract：:Androgenic steroids administered in doses at pharmacological levels to sedentary animals have been shown to result in a reduced beta-adrenoceptor-mediated increase in systolic cardiac performance when assessed in vivo. Whether the attenuated adrenergic response occurs as a consequence of alterations in either cardiac ...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s004210050048
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abstract：:Prolonged immobilization of the human body results in functional impairments and musculoskeletal system deconditioning that may be attenuated by adequate muscle exercise. In a 56-day horizontal bed rest campaign involving voluntary males we investigated the effects of vibration muscle exercise (RVE, 2x6 min daily) on ...
journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00421-006-0160-6
更新日期：2006-06-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-010-1695-0
更新日期：2011-05-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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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
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更新日期：2001-05-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章,评审
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更新日期：2019-07-01 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/s00421-017-3647-4
更新日期：2017-08-01 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
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更新日期：2003-09-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-001-0572-2
更新日期：2002-03-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-009-1080-z
更新日期：2009-08-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s004210050679
更新日期：2000-06-01 00:00:00
abstract：PURPOSE:Changes in mean skin temperature (Tsk) have been shown to modify the maximum rate of sweat ion reabsorption. This study aims to extend this knowledge by investigating if modifications could also be caused by local Tsk. METHODS:The influence of local Tsk on the sweat gland maximum ion reabsorption rates was inv...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-018-04059-5
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/s004210050669
更新日期：2000-06-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-016-3492-x
更新日期：2016-12-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-009-1281-5
更新日期：2010-03-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s004210050658
更新日期：2000-05-01 00:00:00
abstract：:To examine the effects of lower-limb unilateral resistance exercise on central and peripheral arterial stiffness, thirteen participants (7 male and 6 female, mean age = 21.5 +/- 0.7 years) performed leg press exercise using their dominant leg. Pulse wave velocity (PWV) was used to measure central (carotid to femoral) ...
journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
doi：10.1007/s00421-006-0259-9
更新日期：2006-09-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2009-01-01 00:00:00
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journal_title：European journal of applied physiology
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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：: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
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abstract：:While there is some controversy whether anaerobic capacity might be improved after altitude training little is known about changes in anaerobic capacity during hypoxic exposure in highly trained athletes. In order to analyze the effects of acute moderate normobaric hypoxia on anaerobic capacity, 18 male competitive tr...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-007-0473-0
更新日期：2007-09-01 00:00:00
abstract：PURPOSE:We have argued that breathing 40 % O2 attenuates exercise hyperaemia by decreasing production of O2-dependent vasodilators. However, breathing 100 % O2 attenuated endothelium-dependent vasodilatation evoked by acetylcholine and this effect was prevented by vitamin C, implicating reactive oxygen species (ROS). W...
journal_title：European journal of applied physiology
pub_type： 杂志文章,随机对照试验
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更新日期：2015-09-01 00:00:00
abstract：:Whole-body vibration (WBV) leads to a rapid increase in intra-muscular temperature and enhances muscle power. The power-enhancing effects by WBV can, at least in part, be explained by intra-muscular temperature. However, this does not exclude possible neural effects of WBV occurring at the spinal level. The aim of thi...
journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2010-01-01 00:00:00
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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journal_title：European journal of applied physiology
pub_type： 杂志文章
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更新日期：2005-07-01 00:00:00
abstract：:The purpose of this descriptive study was to examine the exercise intensity of a mountain bike (MTB) marathon race lasting 8 days. Seven amateur MTBers (age 33.6 +/- 3.0 years, height 1.67 +/- 0.5 m, body mass 58.4 +/- 9.9 kg) completing the Transalp Challenge 2004 were involved in the study. Before the race subjects ...
journal_title：European journal of applied physiology
pub_type： 杂志文章
doi：10.1007/s00421-008-0855-y
更新日期：2008-12-01 00:00:00
abstract：:The purpose of this study was to examine the relationship between the energy cost (C) and the 3D intracycle velocity variation (IVV; swimming direction--x, vertical--y and lateral--z axes) throughout the 200 m front crawl event. Ten international level swimmers performed a maximal 200 m front crawl swim followed by 50...
journal_title：European journal of applied physiology
pub_type： 临床试验,杂志文章
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