Abstract：
:Reports on reproducibility of lactate markers usually considered only two trials. The authors assessed reproducibility of power output at seven markers in 11 fit subjects over at least six trials under tightly controlled conditions. Subjects undertook incremental exercises (50 W start, +50 W every 3 min to exhaustion) on a cycle ergometer. At each trial blood lactate concentration was determined at rest and within the final 30 s of each stage. The Rest+1, 2.0 and 4.0 mmol/l markers were determined by interpolation, the D-max and nadir using a quadratic model and the lactate slope index using an exponential plus constant model, and a visual turnpoint was determined empirically. Intraclass correlations and coefficients of variation assessed reproducibility. Power output at all markers differed significantly between subjects, but not between trials. Intraclass correlation coefficients were respectively 0.799, 0.794, 0.807, 0.903, 0.677, 0.769 and 0.648, and corresponding standard errors of measurement 11.9, 9.2, 9.1, 2.5, 9.2, 10.8 and 24.7 W. Statistical powers of detecting a 30 W increment at these markers were 0.30, 0.43, 0.42, 0.98, 0.58, 0.38 and 0.18 respectively. These results indicate that only the D-max marker has good reproducibility and that it alone can identify small but meaningful changes in training status with sufficient statistical power.
journal_name
Br J Sports Medjournal_title
British journal of sports medicineauthors
Morton RH,Stannard SR,Kay Bdoi
10.1136/bjsm.2010.076380subject
Has Abstractpub_date
2012-01-01 00:00:00pages
64-9issue
1eissn
0306-3674issn
1473-0480pii
bjsm.2010.076380journal_volume
46pub_type
杂志文章abstract：OBJECTIVES:To evaluate effects of active bike commuting or leisure-time exercise of two intensities on peripheral insulin sensitivity (primary outcome), cardiorespiratory fitness and intra-abdominal adipose tissue mass (secondary outcomes). METHODS:188 physically inactive, healthy women and men (20-45 years) with over...
journal_title：British journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1136/bjsports-2018-100036
更新日期：2019-09-01 00:00:00
abstract：:Acute mood changes occur with various forms of physical activity. Increased levels of endogenous opioids (endorphins) in response to exercise may mediate activity-induced shifts in mood state. Thirteen female and six male aerobics class participants aged 20-46 years received the opiate receptor antagonist naltrexone a...
journal_title：British journal of sports medicine
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1136/bjsm.26.2.111
更新日期：1992-06-01 00:00:00
abstract：:Tournament water skiing is an increasingly popular and internationally successful sport in Great Britain, despite the climate. The kinematics and injury patterns of the three disciplines will be unfamiliar to most clinicians and are described, with estimation of the stresses. Advances in equipment over the last 15 yea...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.30.2.90
更新日期：1996-06-01 00:00:00
abstract：BACKGROUND:It is unclear whether world class endurance athletes, in contrast with less well trained subjects, increase their haemoglobin mass on a regimen of living high and training low (LHTL). OBJECTIVE:To assess whether haemoglobin mass increases in world class athletes on LHTL and whether this increase is associat...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2005.019729
更新日期：2006-02-01 00:00:00
abstract：OBJECTIVES:The cellular basis of painful tendon overuse pathology (tendinosis) is poorly understood. It has been suggested that because of the close anatomical associations between mast cells and vessels in connective tissues, mast cells may mediate the development of tendon hypervascularity or oedema. OBJECTIVES:To e...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2007.040212
更新日期：2008-09-01 00:00:00
abstract：:A case of symptomatic muscle hernia of the leg in a provincial cricketer caused by a cricket ball injury is presented. It was diagnosed clinically and treated with a limited fasciotomy. However, delay in the diagnosis and treatment ended the professional career of the player. An awareness of the condition and a high i...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2007.041541
更新日期：2008-12-01 00:00:00
abstract：:This systematic review set out to identify randomised controlled trials and controlled intervention studies that evaluated the effectiveness of preventive strategies in adolescent sport and to draw conclusions on the strength of the evidence. A literature search in seven databases (Medline, SportDiscus, EMBASE, CINAHL...
journal_title：British journal of sports medicine
pub_type： 杂志文章,meta分析,评审
doi：10.1136/bjsm.2007.035691
更新日期：2007-10-01 00:00:00
abstract：BACKGROUND:Groin pain in athletes is frequent and many different treatment options have been proposed. The current level of evidence for the efficacy of these treatments is unknown. OBJECTIVE:Systematically review the literature on the efficacy of treatments for groin pain in athletes. METHODS:Nine medical databases ...
journal_title：British journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1136/bjsports-2014-094256
更新日期：2015-06-01 00:00:00
abstract：BACKGROUND:Accumulating evidence emphasises a relationship between prolonged sitting and increased risk for cardiometabolic disorders and premature death irrespective of the protective effects of physical activity. Primary care physicians have the potential to play a key role in modifying patients' sedentary behaviour ...
journal_title：British journal of sports medicine
pub_type： 杂志文章,多中心研究
doi：10.1136/bjsports-2012-091357
更新日期：2014-10-01 00:00:00
abstract：BACKGROUND:Achilles tendinopathies are characterised by pain and reduced function, and heavy-load exercises have been shown to be effective in the treatment of painful chronic Achilles tendinopathies. However, basic information is needed on how the biomechanics and neuromuscular control of the exercise are affected by ...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2010.072561
更新日期：2011-04-01 00:00:00
abstract：:A total of 266 patients with injuries to the knee sustained during sports activities were managed by arthroscopy and/or arthrotomy. All of them received systemic examination and a standard battery of knee stability tests. Fifty-three were examined by arthrography and all underwent arthrotomy for surgical correction of...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.27.2.87
更新日期：1993-06-01 00:00:00
abstract：OBJECTIVE:To determine physical activity levels during phase IV cardiac rehabilitation in 31 male myocardial infarction patients (median age 62, range 53-77 years). METHODS:Patients recorded daily physical activity over 16 weeks in a diary. Diaries were analysed for total general physical activity (TGPA), leisure time...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2003.010983
更新日期：2005-03-01 00:00:00
abstract：:A rare case of unstable hamatometacarpal joint fracture-dislocation in a gymnast is presented. It was treated conservatively with successful outcome. ...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.36.5.380
更新日期：2002-10-01 00:00:00
abstract：BACKGROUND:The equivocal findings in the literature on efficacy of massage makes it difficult to assess the requirement for, or justify the use of, specialist massage personnel at major athletics events. However, the use of massage by athletes during training and competition remains popular. OBJECTIVES:To quantify the...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2002.003145
更新日期：2004-04-01 00:00:00
abstract：:Data on tolerance of cardiac pacemakers during diving are very scarce. The aim of this study was to test electronic and mechanical tolerances of pacemakers exposed to experimental reproductions of pressures encountered during diving. Two samples each of 20 different models of cardiac pacemakers were exposed to compres...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2007.039552
更新日期：2008-03-01 00:00:00
abstract：:The Executive Committee of the International Ankle Consortium presents this 2016 position paper with recommendations for information implementation and continued research based on the paradigm that lateral ankle sprain (LAS), and the development of chronic ankle instability (CAI), serve as a conduit to a significant g...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsports-2016-096188
更新日期：2016-12-01 00:00:00
abstract：BACKGROUND/AIM:Dupuytren disease is a fibroproliferative hand condition. The role of exposure to vibration as a risk factor has been studied with contradictory results. Since field hockey is expected to be a strong source of hand-arm vibration, we hypothesised that long-term exposure to field hockey is associated with ...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsports-2016-096236
更新日期：2018-10-01 00:00:00
abstract：OBJECTIVE:Back protectors for snowboarders were analysed with respect to their potential to prevent spinal injury. DESIGN:In 20 Swiss skiing resorts, athletes were interviewed on the slope. In addition, an online survey was conducted. The performance of 12 commercially available back protectors was investigated by mea...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2010.072728
更新日期：2010-09-01 00:00:00
abstract：BACKGROUND:In the International Ski Federation (FIS), World Cup (WC) snowboard cross (SBX) and ski cross (SX), the injury incidence in individual qualification runs versus final runs in heats of four athletes is unknown. Objective To investigate the injury incidence in individual qualification runs versus final runs of...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsports-2011-090528
更新日期：2011-12-01 00:00:00
abstract：:Local injections of corticosteroids are frequently employed in the management of soft-tissue injuries. Side effects and contraindications of this treatment are discussed with reference to relevant literature. Indications for steroid therapy are described. ...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.15.1.71
更新日期：1981-03-01 00:00:00
abstract：OBJECTIVE:To examine whether acute glucocorticoid (GC) intake alters performance and selected hormonal and metabolic variables during submaximal exercise. METHODS:In total, 14 recreational male athletes completed two cycling trials at 70-75% maximum O(2) uptake starting 3 h after an ingestion of either a lactose place...
journal_title：British journal of sports medicine
pub_type： 杂志文章,随机对照试验
doi：10.1136/bjsm.2007.039040
更新日期：2008-04-01 00:00:00
abstract：:The central governor model has recently been proposed as a general model to explain the phenomenon of fatigue. It proposes that the subconscious brain regulates power output (pacing strategy) by modulating motor unit recruitment to preserve whole body homoeostasis and prevent catastrophic physiological failure such as...
journal_title：British journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1136/bjsm.2005.023028
更新日期：2006-07-01 00:00:00
abstract：:This study was carried out to determine the rate and types of injuries experienced by boardsailors. Results derive from: (a) a review of hospital medical records for water sports injuries, and (b) a questionnaire-interview of 73 athletes windsurfing on waters in the Galveston area during a hurricane and in moderate an...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.22.3.95
更新日期：1988-09-01 00:00:00
abstract：OBJECTIVES:To evaluate the hormonal response to strenuous endurance exercise performed by elite athletes. METHODS:Nine professional cyclists (mean (SD) age 28 (1) years; mean (SD) VO(2)MAX 75.3 (2.3) ml/kg/min) who participated in a three week tour race (Vuelta a España 1999) were selected as subjects. Morning urinary...
journal_title：British journal of sports medicine
pub_type： 临床试验,杂志文章
doi：10.1136/bjsm.35.6.424
更新日期：2001-12-01 00:00:00
abstract：:The dominance of East African distance runners and sprinters of West African origin invites discussion around the contribution of genetic and lifestyle factors to performance. In this review, we focus on the genetic basis for performance. Previous research associating candidate genes such as ACE and ACTN3 to endurance...
journal_title：British journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1136/bjsports-2013-092408
更新日期：2013-06-01 00:00:00
abstract：:Anabolic androgenic steroids (AAS) are used illicitly at high doses by bodybuilders. The misuse of these drugs is associated with serious adverse effects to the liver, including cellular adenomas and adenocarcinomas. We report two very different cases of adult male bodybuilders who developed hepatocellular adenomas fo...
journal_title：British journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1136/bjsm.2004.013599
更新日期：2005-05-01 00:00:00
abstract：BACKGROUND:A search of the literature shows that the effect of surgery on ankle proprioception has been hardly investigated. OBJECTIVE:To examine the effect of anatomical reconstruction of the anterolateral capsuloligamentous complex on ankle joint position sense. METHODS:A prospective study using the "slope box" tes...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2004.016527
更新日期：2005-11-01 00:00:00
abstract：BACKGROUND:Repetitive high bone strain and/or strain rates, such as those that occur during running, contribute to stress fractures as well as promoting maintenance of or increase in bone mass. Kinematic differences are known to exist between overground and treadmill running and these may be reflected in different bone...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.37.2.160
更新日期：2003-04-01 00:00:00
abstract：BACKGROUND:Cell adhesion molecules are proteins expressed on the surface of a variety of cells and mediate the leucocyte response to inflammation. Some of these molecules are released to the plasma as soluble forms, whose presence indicates the degree of vascular endothelial activation or dysfunction. Increased concent...
journal_title：British journal of sports medicine
pub_type： 杂志文章
doi：10.1136/bjsm.2006.031047
更新日期：2007-02-01 00:00:00
abstract：AIM/OBJECTIVE:There is ongoing controversy about persistent neurological deficits in active and former football (soccer) players. We reviewed the literature for associations between football activities (including heading/head injuries) and decline in brain structure/function. DESIGN:Systematic literature review. DATA...
journal_title：British journal of sports medicine
pub_type： 杂志文章,评审
doi：10.1136/bjsports-2016-096593
更新日期：2017-11-01 00:00:00
