De Backer, G <br/><br/>
Physical activity and physical fitness levels of Belgian males aged 40-55 years.  [electronic resource] 

 -  Cardiology  1981 
 - 110-28 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article 
<br/><br/><label>ISSN: </label>0008-6312 
<br/><br/><label>Standard No.: </label>10.1159/000173235  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Age Factors<br/>Belgium<br/>Coronary Disease--epidemiology<br/>Energy Metabolism<br/>Heart Rate<br/>Humans<br/>Leisure Activities<br/>Male<br/>Middle Aged<br/>Physical Exertion<br/>Physical Fitness<br/>Regression Analysis<br/>Risk<br/>Work