In: International Journal of Epidemiology, 2002, vol. 31, no. 1, p. 240-247
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In: Pediatric Nephrology, 2004, vol. 19, no. 11, p. 1308-1309
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In: European Heart Journal, 2009, vol. 30, no. 11, p. 1378-1384
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In: British Journal of Nutrition, 2013, vol. 110, no. 7, p. 1188-1194
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In: Cardiovascular Research, 2002, vol. 53, no. 3, p. 688-708
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In: Acta Astronautica, 2010, p. -
We assessed hemodynamic responses induced by orthostatic and mental stressors, using passive head up tilt (HUT) and mental arithmetic (MA), respectively. The 15 healthy males underwent three protocols: (1) HUT alone, (2) MA in supine position and (3) MA+HUT, with sessions randomized and ≥2 weeks apart. In relation to baseline, HUT increased heart rate (HR) (+20.4±7.1 bpm; p<0.001),...
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In: International Journal of Psychophysiology, 2010, vol. 75, no. 1, p. 54-62
Post stress neurovascular responses induced by physical and mental stress are poorly understood. We investigated the time course of cardiovascular and autonomic recovery, induced by orthostatic and mental challenge, using passive head up tilt (HUT) and mental arithmetic (MA), respectively, when applied singly (MA, HUT) or in combination (MA + HUT). Fifteen healthy males participated in three...
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In: Physiology & Behavior, 2012, vol. 106, no. 4, p. 569–573
At orthostatic vasovagal syncope there appears to be a sudden decline of sympathetic activity. As mental challenge activates the sympathetic system, we hypothesized that doing mental arithmetic in volunteers driven to the end point of their cardiovascular stability may delay the onset of orthostatic syncope. We investigated this in healthy male subjects. Each subject underwent a head up tilt...
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In: European Journal of Nutrition, 2014, vol. 53, no. 7, p. 1561-1571
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In: European Journal of Nutrition, 2014, p. 1–11
Purpose: Energy drinks are beverages containing vasoactive metabolites, usually a combination of caffeine, taurine, glucuronolactone and sugars. There are concerns about the safety of energy drinks with some countries banning their sales. We determined the acute effects of a popular energy drink, Red Bull, on cardiovascular and hemodynamic variables, cerebrovascular parameters and...
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