Abstract:
BACKGROUND:Inter-individual differences in cortical bone volumetric density (CoD), such as those related to sex, are a product of differences in remodelling rates. While cortical bone is often treated as a uniform tissue, remodelling rates also vary within individual bones. This level of adaptation has largely been overlooked in analyses of peripheral quantitative computed tomography (pQCT) images. Further, such variation in CoD has never been assessed in growing bones. We hypothesised that CoD varied significantly within the same cross-section of the mid-tibia of adolescents. We further hypothesised that due to the profound impact of oestrogen on remodelling, this variation would be different between sexes. METHODS:Subjects were 183 adolescents (99 girls and 84 boys) in grade 6 and 7 with a mean age of 12.1 years. We used age at peak height velocity to adjust for maturational differences between sexes. Image data from a mid-tibia pQCT scan of each subject were assessed regionally within eight sectors distributed about the cortex and aligned by the anterior tibial crest. We used a repeated measures general linear model to assess intra-individual variation in CoD while controlling for differences in ethnicity, maturity, height, weight, physical activity level and total cross-sectional bone area (ToA). RESULTS:Sector based variation in CoD was significant (p<0.001), with the anterior cortex having lower density than the posterior cortex. The largest percentage difference (anterior vs posteromedial sectors) was 12.2%. A significant sector*sex interaction (p = 0.018) was detected; however, its impact was relatively small with girls having 1.1-3.6% denser bones than boys depending on the sector (2.7% average difference). CONCLUSIONS:The magnitude of the variation in CoD across sectors within individuals of both sex was far greater than the mean differences between the sexes. This finding indicates that the microstructural variation within the mid-tibia is detectable by pQCT and its magnitude suggests an important level of adaptation to loading.
journal_name
Br J Sports Medjournal_title
British journal of sports medicineauthors
Cooper DM,Ahamed Y,Macdonald HM,McKay HAdoi
10.1136/bjsm.2008.049528subject
Has Abstractpub_date
2008-08-01 00:00:00pages
690-5issue
8eissn
0306-3674issn
1473-0480pii
bjsm.2008.049528journal_volume
42pub_type
杂志文章abstract::A prospective study of ocular injuries sustained during sport, was performed from January to June 1987. A total of 84 eye injuries were seen. Of these, 23 were severe enough to necessitate admission to hospital. These latter accounted for one quarter of all severe eye injuries during this period. Racquet sports caused...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.21.4.168
更新日期:1987-12-01 00:00:00
abstract:BACKGROUND:Mental health in sport is a hard-hitting topic that is frequently the subject of news coverage and increasingly a theme for avid research. Some suggest that cricketers, participating in a game unique in its statistical analysis of individual performance, prolonged periods of play away from home and extended ...
journal_title:British journal of sports medicine
pub_type: 信件
doi:10.1136/bjsports-2017-097827.5
更新日期:2017-05-10 00:00:00
abstract::Cardiovascular (CV) screening in young athletes remains challenging and a topic of considerable debate. Recent criticisms of ECG screening have perpetuated arguments that ECG screening is neither indicated nor effective by applying outdated incidence data and flawed methodology. In response, this article provides a cr...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2016-096606
更新日期:2016-11-01 00:00:00
abstract:PURPOSE:It has been hypothesised that certain mitochondrial haplogroups, which are defined by the presence of a characteristic cluster of tightly linked mitochondrial DNA polymorphisms, would be associated with elite Japanese athlete status. To examine this hypothesis, the frequencies of mitochondrial haplogroups found...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2010.072371
更新日期:2011-12-01 00:00:00
abstract:OBJECTIVE:To determine the plasma glucose levels in non-diabetic patients with rotator cuff tear. DESIGN:Frequency-matched case-control study. SETTING:University Teaching Hospital. PARTICIPANTS:The study included 194 subjects who were operated on at our institution. Group 1 included 97 consecutive patients (36 men a...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2008.049320
更新日期:2009-04-01 00:00:00
abstract:OBJECTIVE:To assess the incidence, severity and nature of injuries, to determine risk factors for injury and to identify potential injury prevention strategies in men's international Rugby-7s tournaments. DESIGN:A prospective cohort study. PARTICIPANTS:Players from core teams competing in matches at 6 Sevens World Se...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2016-096043
更新日期:2016-06-01 00:00:00
abstract:OBJECTIVE:To investigate the effect of varying interdental bite platform thickness of the scuba mouthpiece on airway efficiency. METHODS:10 male divers had their mean peak flow measured for free breathing, maximum flow with diving mouthpiece, teeth in occlusion, and for five experimental mouthpieces with different thi...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.30.2.145
更新日期:1996-06-01 00:00:00
abstract:BACKGROUND:No previous study on adult football involving several different countries has investigated the incidence and pattern of injuries at the highest club competitive level. OBJECTIVE:To investigate the risk exposure, risk of injury, and injury pattern of footballers involved in UEFA Champions League and internat...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2004.014571
更新日期:2005-08-01 00:00:00
abstract:OBJECTIVE:The perception of Nigerian athletes of the use of mouth guards to prevent the stresses of sports injuries was examined using psychological, sociological, and physical stress variables. METHODS:The descriptive survey research design was used in this study. Participants (n = 333) were selected using the purpos...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2003.004838
更新日期:2004-12-01 00:00:00
abstract:OBJECTIVE:To summarise the evidence for non-pharmacological management of low back pain (LBP) in athletes, a common problem in sport that can negatively impact performance and contribute to early retirement. DATA SOURCES:Five databases (EMBASE, Medline, CINAHL, Web of Science, Scopus) were searched from inception to S...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2020-102723
更新日期:2020-12-21 00:00:00
abstract:BACKGROUND:Low back pain (LBP) is prevalent among adolescent rowers. This study evaluated the efficacy of a cognitive functional approach to reduce LBP in this population. METHODS:Thirty-six adolescent male rowers reporting LBP participated. Nineteen were randomly allocated to the intervention group to receive a cogni...
journal_title:British journal of sports medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1136/bjsports-2014-093984
更新日期:2015-09-01 00:00:00
abstract::The indiscriminate use of caffeine by people of all ages may present health hazards. The public at large needs to be more informed of the presence of caffeine in commonly consumed foods and beverages, particularly by infants, children and pregnant women. It is the responsibility of all consumers to investigate the caf...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsm.23.1.34
更新日期:1989-03-01 00:00:00
abstract::Skeletal muscle injuries are among the most common and frequently disabling injuries sustained by athletes. Repair of injured skeletal muscle is an area that continues to present a challenge for sports medicine clinicians and researchers due, in part, to complete muscle recovery being compromised by development of fib...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2012-091685
更新日期:2013-06-01 00:00:00
abstract:BACKGROUND AND AIM:Bowling-side quadratus lumborum (QL) asymmetries have been previously reported on the dominant side in junior cricket fast bowlers using MRI. The aim of this study was to investigate QL asymmetry when measuring with two different methods; first using a small number of images with clear muscle borders...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2010.077453
更新日期:2012-03-01 00:00:00
abstract::Based on DNA analysis of a historical case, the authors describe how a female athlete can be unknowingly confronted with the consequences of a disorder of sex development resulting in hyperandrogenism emerging early in her sports career. In such a situation, it is harmful and confusing to question sex and gender. Expo...
journal_title:British journal of sports medicine
pub_type: 传,历史文章,杂志文章
doi:10.1136/bjsm.2010.082552
更新日期:2012-06-01 00:00:00
abstract:OBJECTIVE:Glomerular filtration rate (GFR) is part of routine medical practice for clinical assessment of kidney function in health and disease conditions, and is determined by measuring the clearance of creatinine (Cl-Crn) or estimated (eGFR) from equations using serum creatinine (Crn) or cystatin C (Cyst C). Crn and ...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2012-090976
更新日期:2013-12-01 00:00:00
abstract::Promoting physical activity has become a priority because of its role in preventing childhood obesity and chronic disease. Ecological approaches that recognise the interaction between individuals and the settings in which they spend their time are currently at the forefront of public health action. Schools have been i...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsm.2008.053447
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVES:To assess the results of inferior capsular shift for multidirectional instability of the shoulder in athletes. METHODS:Multidirectional instability was surgically corrected in 53 shoulders in 47 athletes who engaged in contact sports. A history of major trauma was found in eight patients, the others having ...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.36.4.290
更新日期:2002-08-01 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::After an interval of ten years, physically active and inactive male university teachers were re-examined across four measures; predicted maximum oxygen uptake, percentage body fat, personality and attitudes towards physical activity. Both groups showed a decrease in predicted oxygen uptake and an increase in body fat ...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.20.4.174
更新日期:1986-12-01 00:00:00
abstract:BACKGROUND:Ankle sprains are highly prevalent with high risk of recurrence. Consequently, there are a significant number of research reports examining strategies for treating and preventing acute and recurrent sprains (otherwise known as chronic ankle instability (CAI)), with a coinciding proliferation of review articl...
journal_title:British journal of sports medicine
pub_type: 杂志文章,meta分析,评审
doi:10.1136/bjsports-2016-096178
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVE:To determine whether the psychological characteristics of athletes who have undergone an anterior cruciate ligament (ACL) reconstruction change during rehabilitation are related to returning to competitive sport. DESIGN:Prospective longitudinal study. METHOD:87 athletes completed the Emotional Response of A...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2007.044818
更新日期:2009-05-01 00:00:00
abstract:BACKGROUND:Mild cognitive impairment (MCI) is a well-recognised risk factor for dementia and represents a vital opportunity for intervening. Exercise is a promising strategy for combating cognitive decline by improving brain structure and function. Specifically, aerobic training (AT) improved spatial memory and hippoca...
journal_title:British journal of sports medicine
pub_type: 杂志文章,随机对照试验
doi:10.1136/bjsports-2013-093184
更新日期:2015-02-01 00:00:00
abstract::Sexual harassment and abuse occur in all sports and at all levels with an increased risk at the elite level. The physical and psychological consequences of sexual harassment and abuse are significant for the athlete, their team and for the health and integrity of sport in general. The sports medicine health profession...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
doi:10.1136/bjsports-2011-090345
更新日期:2012-10-01 00:00:00
abstract:BACKGROUND:Temporomandibular dysfunction (TMD) has been reported to be a common problem in divers, with a prevalence of up to 68%. No evidence for this is available. OBJECTIVE:To investigate the prevalence of TMD in divers. METHOD:Sixty three subjects were asked to retrospectively complete a questionnaire on symptoms...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2003.005025
更新日期:2004-02-01 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::Mental health symptoms and disorders are common among elite athletes, may have sport related manifestations within this population and impair performance. Mental health cannot be separated from physical health, as evidenced by mental health symptoms and disorders increasing the risk of physical injury and delaying sub...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2019-100715
更新日期:2019-06-01 00:00:00
abstract:BACKGROUND:Although athletes with mental retardation (MR) have achieved an important role, literature concerning the evaluation tests in basketball is still poor. OBJECTIVE:To assess basketball ability before and after a 4-month training performed before championship for athletes with MR and to correlate ability varia...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2006.034918
更新日期:2009-03-01 00:00:00
abstract:OBJECTIVE:To investigate clinical and imaging differential diagnosis and tennis stroke biomechanics potentially involved in lunate stress injury pathogenesis. METHODS:The present report describes five competitive tennis players with overuse-related dorsal wrist pain assessed by magnetic resonance imaging. RESULTS:Mag...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2007.036806
更新日期:2007-11-01 00:00:00
abstract:OBJECTIVES:Physique traits and their relationship to competitive success were assessed amongst lightweight rowers competing at the 2003 Australian Rowing Championships. METHODS:Full anthropometric profiles were collected from 107 lightweight rowers (n = 65 males, n = 45 females) competing in the Under 23 and Open age ...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsm.2004.015990
更新日期:2005-10-01 00:00:00