How does sugar have an effect on leisure workout routines? A brand new examine carried out by researchers from the College of Konstanz gives revealing insights into the connection between blood glucose and the autonomic nervous system: The consumption of sugar counteracts leisure.
A little bit of sugar earlier than a category check, a chunk of chocolate earlier than an essential negotiation, a muesli bar earlier than a marathon – the essential function glucose performs in dealing with traumatic conditions has been effectively researched. Once we eat sugar, the physique reacts extra strongly to emphasize by releasing extra cortisol. As well as, our coronary heart price stays elevated for longer. Which means extra power is obtainable in acute traumatic conditions. The unfavorable long-term penalties are additionally well-known: elevated threat of hypertension, weight problems and heart problems.
What has been much less effectively researched thus far is how sugar consumption impacts leisure. Because of this researchers within the group of Jens Pruessner, professor of neuropsychology on the College of Konstanz, performed a corresponding examine, which has now been revealed within the Worldwide Journal of Psychophysiology. Jens Pruessner summarizes the examine outcomes: “In case your abdomen is full, leisure workout routines won’t be as efficient”.
The Konstanz analysis group goals at understanding what function the physique’s power methods play in leisure and what impact particular person metabolic components have – for instance blood glucose ranges. The autonomic nervous system, which incorporates the sympathetic and parasympathetic nervous methods, controls varied processes in our organism, corresponding to coronary heart price and respiration. “Our coronary heart has an inside pacemaker that determines how briskly it beats. Whereas sympathetic exercise has a stimulating and activating impact in moments of stress, parasympathetic exercise works like a vagal brake, slowing down the heartbeat”, explains Maria Meier, first writer of the examine and postdoctoral researcher in Jens Pruessner’s analysis group.
Candy leisure?
The examine concerned 94 wholesome adults. The individuals who had fasted earlier than coming to the laboratory, have been randomly allotted to eat both a drink containing glucose or water. One half then obtained a calming therapeutic massage, whereas the opposite half rested with no direct intervention. Cardiac exercise was measured constantly. The authors later calculated coronary heart price variability, a measure of the parasympathetic nervous system’s exercise. Additionally they assessed the pre-ejection interval, which is a measure of the exercise of the sympathetic nervous system.
What impact did sugar have on this experiment? All individuals acknowledged that that they had discovered the therapeutic massage or the resting part mentally enjoyable. This was additionally mirrored within the measured cardiac exercise: The comfort methods activated the parasympathetic nervous system, no matter whether or not sugar had been consumed beforehand or not. That massages present deeper leisure in comparison with merely resting had already been proven in earlier research.
On the similar time, the sympathetic nervous system was activated after sugar consumption. “This implies: Though the individuals subjectively felt relaxed, their sympathetic nervous system didn’t decelerate, however stored the physique in a better state of arousal. As a conclusion from our check outcomes we will say that sugar impairs the physique’s capability to chill out”, says neuropsychologist Meier.
So no tender drink, no ice cream earlier than the therapeutic massage? “Having fun with a candy snack is usually related to enjoyable conditions – a chocolate bar or ice cream with a film, a slice of cake on the weekend with the household. In reality, the fixed sympathetic activation after sugar consumption appears to restrict the power to chill out. So, if you wish to explicitly chill out, e.g. by way of meditation or progressive muscle leisure, you shouldn’t eat one thing excessive in sugar beforehand”, explains Jens Pruessner.
The examine additionally results in one other conclusion for the researchers: “To make legitimate statements, we won’t simply take a look at one system in isolation – that’s, both the sympathetic or the parasympathetic system – as a result of in any other case we’d overlook some results”, says Maria Meier. “If we had solely investigated the parasympathetic nervous system, we’d not have noticed the essential impact on the sympathetic nervous system”.