Université de Fribourg

Postprandial hypotension in older adults: Can it be prevented by drinking water before the meal?

Grobéty, Bastien ; Grasser, Erik Konrad ; Yepuri, Gayathri ; Dulloo, Abdul G. ; Montani, Jean-Pierre

In: Clinical Nutrition, 2015, vol. 34, no. 5, p. 885–891

Background & aimsAn important consequence of ageing is a tendency for postprandial blood pressure to decline, which can lead to fainting. As a possible countermeasure, we investigated in healthy older adults the impact of drinking water before a breakfast meal on postprandial cardiovascular and autonomic functions.MethodsAfter a stable cardiovascular baseline recording for at least 20 min,...

Université de Fribourg

Cardio- and cerebrovascular responses to the energy drink Red Bull in young adults: a randomized cross-over study

Grasser, Erik K. ; Yepuri, Gayathri ; Dulloo, Abdul G. ; Montani, Jean-Pierre

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...

Université de Fribourg

Time course of cardiovascular responses induced by mental and orthostatic challenges

Lackner, Helmut Karl ; Goswami, Nandu ; Papousek, Ilona ; Roessler, Andreas ; Grasser, Erik Konrad ; Montani, Jean-Pierre ; Jezova, Daniela ; Hinghofer-Szalkay, Helmut

In: International Journal of Psychophysiology, 2010, vol. 75, no. 1, p. 48-53

Cardiovascular responses to single stressors diminish over time. Interaction of different stressors influencing hemodynamic variables, indicative of stress-induced reactivity and physiological responses are, however, poorly understood. We investigated time course of mental (using mental arithmetic, MA) and orthostatic (using head up tilt, HUT) challenges induced responses in 16 males. Three...

Université de Fribourg

Rate of cardiovascular recovery to combined or separate orthostatic and mental challenges

Goswami, Nandu ; Lackner, Helmut Karl ; Papousek, Ilona ; Jezova, Daniela ; Hinghofer-Szalkay, Helmut ; Montani, Jean-Pierre

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...

Université de Fribourg

Interaction of mental and orthostatic stressors

Goswami, Nandu ; Lackner, Helmut K. ; Papousek, Ilona ; Jezova, Daniela ; Montani, Jean-Pierre ; Hinghofer-Szalkay, Helmut G.

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),...