Abstract:
:The objectives of this study were to evaluate the effect of exercise on knee joint laxity. If exercise induced laxity is physiological, incorporation of this quality into a ligament replacement material would be indicated. Twenty recreational long distance runners average age 41 (range 24 to 50 yr) were tested before and immediately after 30 minutes of running. Using a computerized goniometer type instrument (Acufex KSS), knee flexion, axial tibial rotation and anterior-posterior tibial displacement were simultaneously recorded, while the runners underwent tests of static as well as dynamic knee joint laxity. At 30 degrees of knee flexion, a maximum increase of 16 per cent in mean total anterior-posterior laxity post-exercise was found. At the examination 30 minutes post-exercise, laxity at 30 degrees of knee flexion was still increased. However, laxity at 90 degrees of knee flexion had decreased to pre-exercise levels or below. Anterior tibial displacement, recorded during eccentric quadriceps activity (0 to 90 degrees of knee flexion) with weights attached to the foot, showed a maximum of 18 per cent increase in total anterior-posterior laxity post-exercise. It is suggested that the laxity increase is caused in part by a true ligamentous laxity increase, and in part by a decreased resting tone of the fatigued muscles.
journal_name
Br J Sports Medjournal_title
British journal of sports medicineauthors
Johannsen HV,Lind T,Jakobsen BW,Krøner Kdoi
10.1136/bjsm.23.3.165subject
Has Abstractpub_date
1989-09-01 00:00:00pages
165-8issue
3eissn
0306-3674issn
1473-0480journal_volume
23pub_type
杂志文章abstract:OBJECTIVES:To study the long term effect of tibial shaft fractures treated by immobilisation in a long leg cast on the calf muscle bulk. METHODS:Computed tomography scans were performed at fixed points on the lower legs of 23 non-professional athletes who sustained closed tibial fractures 16 years previously. Length o...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2005.020743
更新日期:2006-06-01 00:00:00
abstract::The effects of an intensive 4 week Alpine climbing expedition on percentage body fat, absolute body fat and lean body mass was investigated in 14 adult male students. Anthropometric measures were taken on two occasions during the training period prior to the expedition, twice during the expedition and finally eight we...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.14.2-3.126
更新日期:1980-07-01 00:00:00
abstract::The purpose of this investigation was to determine the effects of caffeine ingestion on maximal power output and fatigue during short term, high intensity exercise. Nine adult males performed 15 s maximal exercise bouts 60 min after ingestion of caffeine (7 mg.kg-1) or placebo. Exercise bouts were carried out on a mod...
journal_title:British journal of sports medicine
pub_type: 临床试验,杂志文章
doi:10.1136/bjsm.22.4.132
更新日期:1988-12-01 00:00:00
abstract:BACKGROUND:There are controversial data about the relation between foot morphology and athletic injuries of the lower extremity. Studies in soldiers have shown some relationship, whereas those involving athletes have not shown any significant relationship. The reason for these differences is not clear. OBJECTIVE:To de...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2003.011478
更新日期:2005-02-01 00:00:00
abstract:INTRODUCTION:A conservative method of treating four delayed union stress fractures of the anterior mid-tibia is described, with an illustrative case history. METHODS:Once diagnosed each of the patients was treated in a pneumatic lower leg brace with modified rest. The mean (range) age of the patients was 28 (24-32) ye...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.35.1.74
更新日期:2001-02-01 00:00:00
abstract:BACKGROUND:Participation in regular exercise and athletic activities across the lifespan is encouraged to maintain the cardiovascular and musculoskeletal systems and general wellbeing. Before the menopause there is an increased risk of anterior cruciate ligament (ACL) injuries in female athletes, whereas there is an in...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2008.054296
更新日期:2010-09-01 00:00:00
abstract:OBJECTIVE:To quantify and describe medically treated sport and active recreation injuries in a defined region of the Latrobe Valley from 7 November 1994 to 6 November 1995. METHOD:A geographic target area was defined, restricted to the six postcodes that fell wholly within the catchment area of the Latrobe Regional Ho...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.37.5.405
更新日期:2003-01-01 00:00:00
abstract:BACKGROUND:Atrial function is an integral part of cardiac function that is often neglected. The presence of left ventricule hypertrophy (LVH) due to arterial hypertension may impair atrial function. However, it has also been suggested that physical training attenuates the age-associated impairment of diastolic filling....
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2007.041210
更新日期:2008-08-01 00:00:00
abstract:BACKGROUND:Athletic groin pain (AGP) is an encompassing term for the multitude of chronic conditions presenting as pain in the inguinal region. The purpose of this review was to compare the return to play rates (RTPrate) and return to play times (RTPtime) between surgical and rehabilitation interventions in the treatme...
journal_title:British journal of sports medicine
pub_type: 杂志文章,meta分析,评审
doi:10.1136/bjsports-2014-093715
更新日期:2015-11-01 00:00:00
abstract:OBJECTIVES:To investigate the influence of anthropometric parameters on race performance in ultra-endurance triathletes. DESIGN:Descriptive field study. SETTING:The Triple Iron Triathlon Germany 2006 in Lensahn over 11.6 km swimming, 540 km cycling and 126.6 km running. SUBJECTS:17 male Caucasian triathletes (mean (...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2007.039602
更新日期:2009-06-01 00:00:00
abstract:BACKGROUND:In this study we describe (1) the implementation of a novel web-based injury and illness surveillance system (WEB-IISS) for use by a team of physicians at multisport events and (2) the incidence and characteristics of injuries and illness in athletes during the London 2012 Paralympic Games. METHODS:Overall,...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2013-092375
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVE:To compare injury rates among professional men's football teams that have a winter break in their league season schedule with corresponding rates in teams that do not. METHODS:56 football teams from 15 European countries were prospectively followed for seven seasons (2010/2011-2016/2017)-a total of 155 team-...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2018-099506
更新日期:2019-10-01 00:00:00
abstract:OBJECTIVE:In this study, the amplitude and time distribution of power output in a variety of competitive cycling events through the use of a new mathematical analysis was examined: exposure variation analysis (EVA). DESIGN:Descriptive field study. SETTING:Various professional road cycling events, including; a 5-day-e...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2008.047787
更新日期:2010-05-01 00:00:00
abstract:BACKGROUND:Growth factor technologies are increasingly used to enhance healing in musculoskeletal injuries, particularly in sports medicine. Two such products; platelet-rich plasma (PRP) and autologous blood, have a growing body of supporting evidence. No previous trial has directly compared the efficacy of these two m...
journal_title:British journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1136/bjsm.2010.082503
更新日期:2011-09-01 00:00:00
abstract::A focus on low body weight and body fat content, combined with regulations in some weight-sensitive sports, are considered risk factors for extreme dieting, eating disorders (EDs) and related health consequences among athletes. At present there are, from a health perspective, no generally accepted optimum values for b...
journal_title:British journal of sports medicine
pub_type: 共识发展会议,杂志文章
doi:10.1136/bjsports-2013-092966
更新日期:2013-11-01 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:Reduced flexibility has been documented in athletes with lower limb injury, however, stretching has limited evidence of effectiveness in preventing injury or reducing the risk of recurrence. In contrast, it has been proposed that eccentric training can improve strength and reduce the risk of injury, and faci...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2011-090835
更新日期:2012-09-01 00:00:00
abstract:OBJECTIVE:Despite the rise in specialist clinical services for the management of sports and active recreation injury, many patients attend hospital emergency departments for treatment. The purpose of this study was to describe sports injury cases presented to selected hospital emergency departments around Australia for...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.32.3.220
更新日期:1998-09-01 00:00:00
abstract:BACKGROUND:The varying methods of cricket injury surveillance have made direct comparison of published studies in this field impossible. METHODS:A consensus regarding definitions and methods to calculate injury rates in cricket was sought between researchers in this field. This was arrived at through a variety of face...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2004.012732
更新日期:2005-04-01 00:00:00
abstract:OBJECTIVE:To determine the effectiveness of physical activity interventions involving mobile applications (apps) or trackers with automated and continuous self-monitoring and feedback. DESIGN:Systematic review and meta-analysis. DATA SOURCES:PubMed and seven additional databases, from 2007 to 2020. STUDY SELECTION:R...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2020-102892
更新日期:2020-12-21 00:00:00
abstract::Scientific evidence supporting a role for faulty scapular positioning in patients with various shoulder disorders is cumulating. Clinicians who manage patients with shoulder pain and athletes at risk of developing shoulder pain need to have the skills to assess static and dynamic scapular positioning and dynamic contr...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2012-091059
更新日期:2014-06-01 00:00:00
abstract:OBJECTIVES:To examine the attitudes to, and knowledge of, doping in sport of French general practitioners (GPs), and their contact with drug taking athletes on an everyday basis. METHODS:A total of 402 GPs were randomly selected from all over France and interviewed by telephone, using a prepared script. RESULTS:The r...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.37.4.335
更新日期:2003-08-01 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:OBJECTIVES:To determine if asymmetry of trunk muscles and deficits of motor control exist among elite cricketers with and without low back pain (LBP). DESIGN:Single-blinded observational quasi-experimental design study SETTING:Assessments were conducted in a hospital setting. PARTICIPANTS:Among a total eligible samp...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2007.044024
更新日期:2008-10-01 00:00:00
abstract::Discussion related to hernias in sport usually involves the diagnosis and treatment of chronic musculotendinous groin disruption. A case of acute trauma in an incarcerated inguinal hernia, occurring in a rugby union player during a lineout, is presented. The injury arose as a result of a change in the laws of the game...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.33.1.52
更新日期:1999-02-01 00:00:00
abstract:BACKGROUND:Injuries are common in youth soccer, of which ankle injuries form a significant proportion. However, there is a lack of prospective data on the epidemiology and nature of these injuries. AIM:To prospectively study the incidence of ankle injuries in three Football Association (FA) academies, with particular ...
journal_title:British journal of sports medicine
pub_type: 杂志文章,多中心研究
doi:10.1136/bjsm.2009.067900
更新日期:2011-07-01 00:00:00
abstract::Three tests were conducted to assess the effectiveness of three different intensities of exercise both in reducing blood lactic acid (LA) levels and in influencing subjects' heart rate (HR), following a 2000 m race in a rowing boat. In the first and second tests these variables were investigated during a 13 min recove...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.19.4.199
更新日期:1985-12-01 00:00:00
abstract::A 23 year old male kick boxer presented with a 24 hour history of pain and being unable to extend the interphalangeal joint of the left thumb. There was no history of trauma or any other risk factor for spontaneous rupture of the extensor pollicis longus tendon. On the previous day, he had been doing reverse press ups...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.32.2.178
更新日期:1998-06-01 00:00:00
abstract::Administration of recombinant human erythropoietin (rHumanEPO) improves sporting performance and hence is frequently subject to abuse by athletes, although rHumanEPO is prohibited by the WADA. Approaches to detect rHumanEPO doping have improved significantly in recent years but remain imperfect. A new transcriptomic-b...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2014-093529
更新日期:2014-05-01 00:00:00
abstract::Hypothermia is a serious condition, often with fatal consequences. The physiology and mechanisms of hypothermia in mountainous areas are discussed. It is as important to facilitate heat loss, especially during periods of high exertion, as it is to maintain heat production and preserve insulation. This can be partly ac...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.37.6.548
更新日期:2003-12-01 00:00:00