OBJECTIVE To compare airway responsiveness to methacholine, cycle ergometer exercise and free running in children with intermittent asthma. METHODS A randomized study was conducted with 30 children of both genders with intermittent asthma. Each child was submitted to challenge testing on three separate days, in random order: a) Methacholine challenge using a dosimeter; b) Exercise challenge t...

Rainbow trout were subjected to burst swimming to exhaustion followed by 4 h aerobic swimming at 80% critical swimming velocity. Severe physiological disturbances, including a marked plasma acidosis caused by the burst swim, were corrected during the 4 h of subsequent aerobic exercise. Erythrocytic pH and arterial oxygen content increased, even though plasma pH was reduced. We suggest that the ...

Background: Statins frequently cause myopathy especially in combination with fibrates, and physical activity is considered a trigger for the muscle disorder. Elevated plasma levels of creatine kinase (CK), lactate dehydrogenase (LDH) and aldolase, are the main indicators of the severity of myopathy. Carvedilol is commonly used with lipid-lowering drugs in the management of heart failure, hypert...

the present study aimed to compare substrate oxidation and total energy expenditure during running with low and moderate intensity until exhaustion and one hour after exercise in obese male students. for this purpose, in a crossover study design, 11 male university students (mean age 20.45±1.69 years, bmi 31.26±1.3 kg/m2, body fat percentage 28.47±3.53 %) participated in this study. two exercis...

The relationship between heart rate (f(H)) and rate of oxygen consumption (V(O2)) was established for a marine diving bird, the common eider duck (Somateria mollissima), during steady-state swimming and running exercise. Both variables increased exponentially with speed during swimming and in a linear fashion during running. Eleven linear regressions of V(O2) (ml kg(-1 )min(-1)) on f(H) (beats ...

the aim of this study was to compare the effect of an aerobic exercise program with two different volumes on some risk factors of cardiovascular diseases in mentally retarded girls. 24 mentally retarded girls were randomly assigned to three groups: 1) aerobic exercise, 3 sessions per week for 45 minutes, 2) aerobic exercise, 4 sessions per week for 40 minutes, and 3) control. the experimental g...