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| Reference : Effets du blocage des récepteurs beta-adrenergiques sur l'hyperlactacidémie induite par ... |
| Scientific journals : Article | |||
| Human health sciences : Endocrinology, metabolism & nutrition | |||
| http://hdl.handle.net/2268/2266 | |||
| Effets du blocage des récepteurs beta-adrenergiques sur l'hyperlactacidémie induite par des exercices d'intensités différentes | |
| French | |
| [en] Effects of Beta-Adrenergic Receptor Blockade on Hyperlactacidemia Induced by Exercise of Different Intensity | |
Scheen, André  [Université de Liège - ULg > Département des sciences cliniques > Diabétologie, nutrition et maladie métaboliques - Médecine interne générale] | |
| Camus, G. [> > > >] | |
| Fossion, Anny [Université de Liège - ULg > > Relations académiques et scientifiques (Psycho et sc.éduc.) >] | |
| Aug-1991 | |
| Archives Internationales de Physiologie, de Biochimie et de Biophysique | |
| 99 | |
| 4 | |
| 331-4 | |
| 0778-3124 | |
| [en] The effects of beta-adrenergic blockade on the exercise-induced hyperlactatemia (Lap) have been studied in 31 adult male subjects [age: 25 +/- 1 years; body weight: 69 +/- 1 kg; VO2max: 54 +/- 1 ml O2.kg-1.min-1 (mean values +/- SEM)] randomly divided in 3 groups. All exercises were performed on a 10% inclined treadmill. In group 1 (n = 11), the subjects were walking during 20 minutes at 5 km.h-1 (55.6 +/- 1.4% VO2max). In group 2 (n = 10), they were running during 9 minutes at 8 km.h-1 (79.4 + 1.5% VO2max). The subjects of the third group (n = 10) were submitted to a 4 minutes run at 9.5 km.h-1 92 +/- 1.6% VO2max). These exercises were performed 1 hour after ingestion of a placebo or a single dose of 40 mg propranolol, in a double-blind randomized order. Blood samples were drawn at regular time intervals from an antecubital vein. Exercise tachycardia was reduced by about 20% (P less than 0.001) by propranolol in each group. Lap was significantly reduced by 15% by propranolol (P less than 0.005) at the lowest exercise intensity (55.6% VO2max), remained unchanged at 79.4% VO2max and was significantly enhanced by 16% during the recovery period following the run at 92% VO2max. These results clearly showed that the effects of acute beta-adrenergic blockade on Lap depend on exercise intensity. | |
| Researchers ; Professionals ; Students | |
| http://hdl.handle.net/2268/2266 |
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