OBJECTIVE: A decrease in dopamine activity is thought to lead to a reduction in motivation and arousal and therefore to the "central" component of fatigue. The purpose of the present study was to investigate the effects of a dopamine (DA) noradrenaline (NA) reuptake inhibitor, bupropion (Zyban), on exercise performance and on the hormonal response to exercise. METHODS:Eight healthy well trained male cyclists (Watt(max) 397+/-15 W) participated in the study. Subjects completed one maximal exercise test (to determine maximal power output Watt(max)), and two endurance performance tests (time trials) in a double blind randomised cross-over design. Subjects took either placebo capsules (lactose) or 2 x 300 mg bupropion (BUP). Blood samples were collected for adrenocorticotropin (ACTH), prolactin, cortisol, growth hormone, beta-endorphins, and catecholamines. RESULTS: Performance was not influenced by BUP (placebo: 89+/-1 min; BUP 2 x 300 mg: 89+/-0.7 min). All hormones increased during exercise in all trials. Cortisol plasma concentrations were significantly higher in the BUP trial at rest, at min 60, and at the end of exercise, while beta-endorphins were higher in the BUP trial at the end of exercise and during recovery, and ACTH at the end of exercise. CONCLUSION: From the present results, we can conclude that bupropion had a more marked central noradrenergic effect (compared to dopaminergic) on the hormonal response to exercise, but no effect on the outcome of performance.
RCT Entities:
OBJECTIVE: A decrease in dopamine activity is thought to lead to a reduction in motivation and arousal and therefore to the "central" component of fatigue. The purpose of the present study was to investigate the effects of a dopamine (DA) noradrenaline (NA) reuptake inhibitor, bupropion (Zyban), on exercise performance and on the hormonal response to exercise. METHODS: Eight healthy well trained male cyclists (Watt(max) 397+/-15 W) participated in the study. Subjects completed one maximal exercise test (to determine maximal power output Watt(max)), and two endurance performance tests (time trials) in a double blind randomised cross-over design. Subjects took either placebo capsules (lactose) or 2 x 300 mg bupropion (BUP). Blood samples were collected for adrenocorticotropin (ACTH), prolactin, cortisol, growth hormone, beta-endorphins, and catecholamines. RESULTS: Performance was not influenced by BUP (placebo: 89+/-1 min; BUP 2 x 300 mg: 89+/-0.7 min). All hormones increased during exercise in all trials. Cortisol plasma concentrations were significantly higher in the BUP trial at rest, at min 60, and at the end of exercise, while beta-endorphins were higher in the BUP trial at the end of exercise and during recovery, and ACTH at the end of exercise. CONCLUSION: From the present results, we can conclude that bupropion had a more marked central noradrenergic effect (compared to dopaminergic) on the hormonal response to exercise, but no effect on the outcome of performance.
Authors: Neil B Alexander; George E Taffet; Frances McFarland Horne; Basil A Eldadah; Luigi Ferrucci; Susan Nayfield; Stephanie Studenski Journal: J Am Geriatr Soc Date: 2010-05 Impact factor: 5.562
Authors: C W Holtzman; H D Trotman; S M Goulding; A T Ryan; A N Macdonald; D I Shapiro; J L Brasfield; E F Walker Journal: Neuroscience Date: 2013-01-05 Impact factor: 3.590
Authors: Arne Meyer; Anna Vuorinen; Agnieszka E Zielinska; Petra Strajhar; Gareth G Lavery; Daniela Schuster; Alex Odermatt Journal: Drug Metab Dispos Date: 2013-06-26 Impact factor: 3.922
Authors: Heather S L Jim; Aasha I Hoogland; Hyo Sook Han; Eva Culakova; Charles Heckler; Michelle Janelsins; Geoffrey C Williams; Julienne Bower; Stephen Cole; Zeruesenay Desta; Margarita Bobonis Babilonia; Gary Morrow; Luke Peppone Journal: Contemp Clin Trials Date: 2020-03-05 Impact factor: 2.226
Authors: Janet L Taylor; Markus Amann; Jacques Duchateau; Romain Meeusen; Charles L Rice Journal: Med Sci Sports Exerc Date: 2016-11 Impact factor: 5.411