Is there an ideal time to train? | Life

REHOVOT (Israel), April 20 – Two studies published in Cell Metabolism confirm the impact of our sleep cycle on sports performance.

"It is well known that almost every aspect of our physiology and metabolism is dictated by the circadian clock. This is true not only in humans but in all light-sensitive organisms. We decided to ask if there was a link between the time of day and the performance of an exercise, "says Gad Asher of the Department of Biomolecular Sciences of Rehovot, the Institute of science Israel Weizmann, who co-wrote one of the studies.

Led by Paolo Sbadone-Corsi, from the Irvine Center for Epigenetics and Metabolism, the first study used mice on treadmills to observe process mechanisms such as glycolysis (metabolizing sugars into energy) and lipid oxidation (fat burning). .

The US team of scientists has also discovered that the protein hif-1⍺, known to stimulate certain genes based on tissue oxygen levels, is activated by physical activity in different ways depending on the time of day. day: I do not know that its levels fluctuate according to the time of day, "says Sbadone-Corsi.

Will training in the morning better than the evening?

The second study, conducted by Professor Asher, also used mice on treadmills at different times of the day. The scientists then asked 12 people to perform a similar exercise. The experiment revealed that oxygen levels in the cells were lower in the mice and human participants who trained in the morning compared to those who did it in the evening, which is why they were not. is translated by greater efficiency and a reduced perception of the effort.

The researchers behind both studies doubt that the results can be directly transposed to humans, because our chronotypes are more varied than mice living in a laboratory: "You can be a morning, or night, and these things must to be taken into account, "says Sbadone-Corsi.

The best time of the day to work seems to be primarily related to our own internal clock and can therefore vary greatly from one individual to the next. – AFP-Relaxnews