摘要:

ObjectiveTo determine whether a relationship exists between left ventricular morphology and aerobic capacity in large numbers of male university students with a physically inactive and active life style.DesignA prospective study.SettingSports medicine research center.ParticipantsEleven sedentary normal-weight university students, 17 sedentary overweight university students, and 215 university athletes.Main Outcome MeasuresAfter the echocardiographic examination, an incremental treadmill exercise test until exhaustion was performed to measure peak oxygen uptake (VO2).ResultsIn sedentary students, absolute peak VO2in the overweight students was slightly higher than that in normal-weight students (3,024 vs. 2,912 ml/min). Relative peak VO2(ml/min/kg) was highly negatively correlated with body mass index (kg/m2) in a total of 28 sedentary students. The correlation between absolute peak VO2and left ventricular dimension was weak in the sedentary overweight students; however, a correlation coefficient of 0.55 was obtained in athletic students. A stepwise multiple regression showed significant determinants of absolute peak VO2in athletic students for body surface area (45%), left ventricular dimension (7%), and certain sports (6%).ConclusionsA physically active life style plays a role in increasing both aerobic capacity and left ventricular enlargement. Body size appeared to be a potent stimulus to left ventricular enlargement.

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

摘要:

ObjectiveTo critically review the current data concerning the efficacy of preventive measures described in the literature, on the incidence of lateral ankle ligament injuries.Data SourcesMEDLINE, Sportdiscus, and EMBASE were searched for papers published between 1980 and December 1998. Keywords used in the search were “prevention” in combination with “ankle,” “ankle taping,” “ankle bracing,” “orthosis,” “shoes,” and “proprioception.” Additional references were reviewed from the bibliographies of the retrieved articles.Study SelectionA study was included if: 1) the study contained research questions regarding the prevention of lateral ankle ligament injuries; 2) the study was a randomized controlled trial, a controlled trail, or a time intervention; 3) the results of the study contained incidence rates of lateral ankle ligament injuries as study outcome; and 4) the study met the cut-off score set for quality.Data Extraction and SynthesisTwo reviewers reviewed relevant studies for strengths and weaknesses in design and methodology, according to a standardized set of predefined criteria. Eight relevant studies met the criteria for inclusion and were analyzed.Main ResultsOverall, all studies reported a significant decrease in incidence of ankle sprains using the studied preventive measure. There was a great variety in methodology and study design between the eight analyzed studies, and every study had one or more drawbacks. Therefore, between studies only general results could be compared.ConclusionsThe use of either tape or braces reduces the incidence of ankle sprains. Next to this preventive effect, the use of tape or braces results in less severe ankle sprains. However, braces seem to be more effective in preventing ankle sprains than tape. It is not clear which athletes are to benefit more from the use of preventive measures: those with or those without previous ankle sprains. The efficacy of shoes in preventing ankle sprains is unclear. It is likely the newness of the footwear plays a more important role than shoe height in preventing ankle sprains. Proprioceptive training reduces the incidence of ankle sprains in athletes with recurrent ankle sprains to the same level as subjects without any history of ankle sprains.

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID

ISSN:1050-642X    

出版商:OVID    

年代:2000

数据来源: OVID