Effect of beta-adrenoceptor stimulation on oxygen consumption and triglyceride/fatty acid cycling after exercise. Export

@article{citeulike:1028526, abstract = {The purpose of this study was to characterize the effects of prolonged beta-adrenoceptor stimulation on O2 uptake and triglyceride/fatty acid (TG/FA) cycling during rest with and without previous exercise. Eight men performed two exercise (90 min cycling at 56 +/- 3 (SD)\% of maximal O2 uptake, followed by 4.5 h bed rest) and two rest-control experiments. In one rest and one exercise experiment a bolus dose (5 micrograms) of the beta-adrenoceptor agonist isoprenaline was given immediately after exercise, followed by a continuous infusion (20 ng kg-1 min-1), and at the corresponding time in the rest experiment. In the other experiments saline was given instead. The O2 uptake increased in the post-exercise period both with and without beta-stimulation. The total excess post-exercise oxygen consumption (EPOC) was not different between saline (8.1 +/- 1.8 (SE) L) and isoprenaline administration (10.8 +/- 1.8 L, P = 0.40). Also, the total accumulated increase in O2 uptake for the 4.5 h period after isoprenaline infusion was not different between the rest (12.5 +/- 2.0 L) and the exercise experiments (15.2 +/- 1.7 L, P = 0.40). The rate of TG/FA cycling increased after both exercise and isoprenaline treatment, but no interaction effect was found. In conclusion, the increases observed in O2 uptake and the rate of TG/FA cycling during beta-adrenoceptor stimulation were not increased by a previous exercise bout.}, address = {Norwegian University of Sport and Physical Education, Oslo, Norway.}, author = {B{\o}rsheim, E. and Bahr, R. and Knardahl, S.}, citeulike-article-id = {1028526}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/9805102}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=9805102}, issn = {0001-6772}, journal = {Acta Physiol Scand}, keywords = {beta-adrenoceptor, epoc, fattyacids, oxygen}, month = {October}, number = {2}, pages = {157--166}, posted-at = {2007-01-06 19:22:38}, priority = {2}, title = {Effect of beta-adrenoceptor stimulation on oxygen consumption and triglyceride/fatty acid cycling after exercise.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/9805102}, volume = {164}, year = {1998} }

TY - JOUR ID - citeulike:1028526 L3 - citeulike-article-id:1028526 N2 - The purpose of this study was to characterize the effects of prolonged beta-adrenoceptor stimulation on O2 uptake and triglyceride/fatty acid (TG/FA) cycling during rest with and without previous exercise. Eight men performed two exercise (90 min cycling at 56 +/- 3 (SD)% of maximal O2 uptake, followed by 4.5 h bed rest) and two rest-control experiments. In one rest and one exercise experiment a bolus dose (5 micrograms) of the beta-adrenoceptor agonist isoprenaline was given immediately after exercise, followed by a continuous infusion (20 ng kg-1 min-1), and at the corresponding time in the rest experiment. In the other experiments saline was given instead. The O2 uptake increased in the post-exercise period both with and without beta-stimulation. The total excess post-exercise oxygen consumption (EPOC) was not different between saline (8.1 +/- 1.8 (SE) L) and isoprenaline administration (10.8 +/- 1.8 L, P = 0.40). Also, the total accumulated increase in O2 uptake for the 4.5 h period after isoprenaline infusion was not different between the rest (12.5 +/- 2.0 L) and the exercise experiments (15.2 +/- 1.7 L, P = 0.40). The rate of TG/FA cycling increased after both exercise and isoprenaline treatment, but no interaction effect was found. In conclusion, the increases observed in O2 uptake and the rate of TG/FA cycling during beta-adrenoceptor stimulation were not increased by a previous exercise bout. IS - 2 JF - Acta Physiol Scand SN - 0001-6772 AD - Norwegian University of Sport and Physical Education, Oslo, Norway. EP - 166 TI - Effect of beta-adrenoceptor stimulation on oxygen consumption and triglyceride/fatty acid cycling after exercise. VL - 164 SP - 157 KW - beta-adrenoceptor KW - epoc KW - fattyacids KW - oxygen AU - Børsheim, E AU - Bahr, R AU - Knardahl, S PY - 1998/10// UR - http://view.ncbi.nlm.nih.gov/pubmed/9805102 ER -