Abstract:
:The purpose of this investigation was to determine the oxygen consumption, heart rate and plasma lactate responses at the fatigue threshold (FT) and estimate the length of time the FT could be maintained. Ten adult males (mean age +/- SD = 21.1 +/- 1.3 yrs) volunteered to perform a maximal treadmill test and FT test. During the maximal test, VO2 heart rate and plasma lactate measurements were taken. The results of the investigation indicated that the FT (14.0 +/- 1.2 km.hr-1, 197 +/- 8 bpm; 47.5 +/- 5.7 ml/kg.min-1, 5.4 +/- 1.3 mM) was very close to a maximal effort (VO2max = 14.4 +/- 1.2 km.hr-1, 203 +/- 10 bpm; 49.5 +/- 6.1 ml/kg.min-1, 7.4 +/- 2.1 mM) and could be maintained for only 0.16 to 0.28 hrs. These findings do not support the validity of the FT as a measure of the maximal running velocity that can be continued for an extended period of time without exhaustion.
journal_name
Int J Sports Medjournal_title
International journal of sports medicineauthors
Housh TJ,Johnson GO,McDowell SL,Housh DJ,Pepper Mdoi
10.1055/s-2007-1024686subject
Has Abstractpub_date
1991-06-01 00:00:00pages
305-8issue
3eissn
0172-4622issn
1439-3964journal_volume
12pub_type
杂志文章abstract::The present study was designed to examine the effects of administration of a GABAergic agonist (Baclofen) on run-time to exhaustion in trained and untrained rats, and on some indicators of fatigue. Run-time to exhaustion on a treadmill set at a speed of 25 m.min-1 was significantly increased in both untrained (p < 0.0...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-972598
更新日期:1997-02-01 00:00:00
abstract::We investigated the effects of vibration (35 Hz, 45 Hz and 55 Hz) as countermeasure locally applied to unloading hind limbs on bone, muscle and Achilles tendon. 40 female Sprague Dawley rats were divided into 5 groups (n=8, each): tail-suspension (TS), TS plus 35 Hz/0.3 g vibration (TSV35), TS plus 45 Hz/0.3 g vibrati...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0033-1358468
更新日期:2014-06-01 00:00:00
abstract::The shock-absorbing characteristics of the heel pad in vivo were examined in adults (N = 16) and 7-year-old children (N = 5) using a drop-impact tester (wt = 5 kg). Impact velocities were 0.72 m/s and 0.93 m/s. It was found that in adults the average peak deceleration was 11.6 G at an impact velocity of 0.93 m/s. The ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1021184
更新日期:1993-08-01 00:00:00
abstract::The aim of this study was to examine the relationship between anthropometry, physical capacity, and sprint swimming performance in swimmers of both genders aged 12 - 14 years old. Anthropometric characteristics (body height and mass, total upper extremity, hand and foot lengths, chest circumference, certain body bread...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2004-817862
更新日期:2005-03-01 00:00:00
abstract::Aerobic performance is negatively impacted by tropical climate due to impairment of thermoregulatory mechanisms. We tested the hypothesis that a torso application of a 4% menthol solution would have the same effect on a best performance 10-km run as an external use of cold water. Thirteen trained male athletes complet...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/a-1062-6520
更新日期:2020-03-01 00:00:00
abstract::This study was undertaken to evaluate the effects of the supine posture, immersion, and swimming on hormones involved in the regulation of hydrosaline equilibrium. Plasma levels of atrial natriuretic peptide (ANP), arginine vasopressin (AVP), plasma renin activity (PRA), and aldosterone (ALDO) were measured by radioim...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024933
更新日期:1989-12-01 00:00:00
abstract:BACKGROUND:The purpose of this study was to examine some motor performance aspects of the unloaded lower extremity after Achilles tendon rupture repair. The measured motor performance aspects were simple reaction time, choice reaction time, speed of movement, foot tapping speed, and coordination. METHODS:Ninety patien...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2001-11345
更新日期:2001-02-01 00:00:00
abstract::Limited data exist concerning exercise training-induced alterations in skeletal muscle oxidative and antioxidant enzyme activity in senescent animals. Therefore, the purpose of this study was twofold: 1) to examine the exercise training-induced changes in oxidative and antioxidant enzyme activity in skeletal muscle of...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1021290
更新日期:1992-07-01 00:00:00
abstract::The purpose of this study was to examine whether mental fatigue influences the perceived effort required to complete fairly light and hard effort self-paced exercise challenges. 12 participants completed 2 trials in a randomised cross-over design. Each participant was required to complete a time-matched pre-exercise t...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0033-1343402
更新日期:2013-12-01 00:00:00
abstract::Postexercise proteinuria has been observed in healthy adults but there was a need for information in young individuals. Boys and girls (n = 170) from 6 to 18 years of age were submitted to maximal exercise by the 20-meter shuttle run test. Urine collection was made prior to and 30 min after completion of the run. Tota...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2007-972876
更新日期:1996-08-01 00:00:00
abstract::The purpose of this study is to investigate whether a periosteum patch could enhance polyethylene terephthalate (PET) artificial ligament graft osseointegration in a bone tunnel. 12 female goats underwent ACL reconstruction with a PET artificial ligament graft in the right knees. Right knees in 6 goats were reconstruc...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0042-102258
更新日期:2016-06-01 00:00:00
abstract::This study aims to investigate the relationship between subjective and external measures of load in professional youth football players whilst accounting for the effect of training theme or competition. Data from ratings of perceived exertion and global positioning system-derived measures of external training load wer...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/a-1300-2959
更新日期:2020-12-01 00:00:00
abstract::The present series of experiments were conducted to access the surface EMG frequency parameters during repeated fingertip isometric contractions to determine if they can be used as a fatigue index under specific grip used in rock climbing. Electromyograms of the finger flexors and extensors were characterised in ten e...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2003-41174
更新日期:2003-08-01 00:00:00
abstract::The optimal exercise modality for the improvement of health-related parameters and microvascular function in obese adolescents is not yet fully understood. Therefore, this study aimed to 1) compare the microvascular phenotype of obese and normal-weight adolescents; and 2) to determine the effects of a lifestyle interv...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/a-0577-4280
更新日期:2018-06-01 00:00:00
abstract::Chlorhexidine-containing mouthwash (STRONG), which disturbs oral microflora, has been shown to diminish the rise in plasma nitrite concentration ([NO2-]) and attenuate the reduction in resting blood pressure (BP) typically seen after acute nitrate (NO3-) ingestion. We aimed to determine whether STRONG and weaker antis...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0035-1554700
更新日期:2015-12-01 00:00:00
abstract::The use of aero style handlebars has gained popularity in triathlons and individual time trial events recently. The effect of using these handlebars has only been examined during short term exercise. It was the aim of this investigation to compare time to exhaustion and selected measures of ventilation, gas exchange a...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1021013
更新日期:1994-01-01 00:00:00
abstract::Muscle biopsies from m. vastus lateralis of two world class shot putters (shot putter 1 and 2) and the untrained brother of shot putter 1 were analyzed for fiber type distribution with ATPase staining and in situ hybridization for the expression of alkali myosin light chain (MLC) isoforms. Shot putter 2 had a predomin...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2003-39092
更新日期:2003-04-01 00:00:00
abstract::Meniscocapsular separations are often seen in knees with other intra-articular pathology. The consequences of these tears with regard to knee contact mechanics are currently unknown, and the biomechanical advantages of repair have not been measured. We hypothesize that tears to the meniscocapsular junction will cause ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0034-1398656
更新日期:2015-06-01 00:00:00
abstract::The purpose of this study was to assess the reliability of a pre-loaded 1 500-m treadmill time trial, conducted in moderate normobaric hypoxia. 8 trained runners/triathletes (24±3 years, 73.2±8.1 kg, 182.5±6.5 cm, altitude specific V˙O2max: 52.9±5.5 ml·kg(-1)·min(-1)) completed 3 trials (the first as a familiarisation...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0042-108651
更新日期:2016-09-01 00:00:00
abstract::As people age, they experience a decline in immune responses. Unusually heavy acute or chronic exercise could increase the risk of upper respiratory tract infection (URTI) whereas regular moderate physical activity may reduce URTI symptomatology. The purpose of the present study was to determine whether an aerobic exe...
journal_title:International journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1055/s-0029-1237389
更新日期:2009-12-01 00:00:00
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journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-0042-104061
更新日期:2016-09-01 00:00:00
abstract::The hypothalamic-pituitary-testicular (H-P-T) axis was evaluated in groups of endurance-trained (TRG) and untrained (UNT) males. Each group was subjected to: 1) a 4-h resting hormonal profile [testosterone (T), free-testosterone (FT), estradiol (E2), luteinizing hormone (LH), prolactin (PRL), and cortisol (C)], 2) a d...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024811
更新日期:1990-08-01 00:00:00
abstract::Although analysis of lactate concentrations with a Yellow Springs Instruments (YSI) automated analyzer has become very popular in Sports Medicine, the accuracy and reliability of this technique has not been carefully studied. Additionally, the influence of a common lysing agent Triton X-100 (TX) on blood lactate measu...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1021231
更新日期:1992-01-01 00:00:00
abstract::Length and weight for age (1-12 months) charts are presented for the longitudinal Euro-Growth Study. "Weight-for-length", another widely used growth chart, presents a problem from a methodological point of view. Target length values (53-77 cm) are not observed in all infants, leading to truncated age distributions at ...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-972716
更新日期:1997-07-01 00:00:00
abstract::Three different procedures to analyse fencing performances were tested. The test subjects were ten world class epée fencers from the Swedish national team. The procedures involved measurements of reaction time and response time to different stimuli. Test 1 measured the lunging performance as a response to a light. Tes...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1024736
更新日期:1991-12-01 00:00:00
abstract::One hundred fourteen subjects (34 +/- 8 years) without any competition background took part in an endurance training study to be completed after 1.5 years with running a marathon. Ultimately, 60 males and 18 females achieved that goal. The training program, carefully supervised, was divided into three phases with a ma...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2007-1024960
更新日期:1989-10-01 00:00:00
abstract::The aim of the present study was to evaluate a heart transplanted patient who ran a 20-km race 9 months after surgery. Thirty-six healthy male subjects were studied during the same run and served as control group. Biochemical variables were determined in blood and urine samples collected before and after the race. Pos...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2008-1025867
更新日期:1985-12-01 00:00:00
abstract::The total number of leucocytes, T lymphocyte subsets, mitogen induced proliferation of lymphocytes, Il-2 generation, adherence capacity and chemiluminescence of granulocytes were measured and a leukergy test performed in fifteen young cyclists. The investigations were carried out at rest at the beginning of a training...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2007-1021067
更新日期:1994-08-01 00:00:00
abstract::This study investigated the relationship between sports participation/physical activity during youth (13 - 18 years of age) and adulthood (30 - 40 years of age), and cardiovascular risk factors (body fat and fat distribution, blood pressure, lipoprotein levels and cardiorespiratory fitness) at 40 years of age. Subject...
journal_title:International journal of sports medicine
pub_type: 杂志文章
doi:10.1055/s-2002-28459
更新日期:2002-05-01 00:00:00
abstract::Stretching of an activated muscle prior to its shortening enhances its performance during the concentric contraction. This phenomenon has been interpreted to be primarily due to the utilization of elastic energy stored in the series elastic elements of the muscle during the stretch. However, reflex potential has also ...
journal_title:International journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1055/s-2008-1026076
更新日期:1982-08-01 00:00:00