Circadian variation strongly affects performance in Olympic athletes

Your circadian rhythm is very important, we of course already knew that. There are a lot of applications where shifting your circadian rhythm can give you an important advantage. Shiftwork, flying and the winterblues are examples of this. Now, scientific research concludes that the performance of Olympic athletes can be strongly affected by circadian variation!

Studies investigating these effects on elite athletes during high-level competitions are scarce. The Olympic venues are leading international sporting events, with thousands of athletes from around the world. The country selected to host the Olympics, sometimes adjusts race times to accommodate prime-broadcasting times in other continents. As a result, athletes are often required to perform at different, and sometimes unusual, times of day. This variation can be used to analyze time-of-day effects on physical performance in professional, extremely motivated male and female athletes.

 

Results

 

Data analysis on within subject normalized data revealed that race type significantly affected swim performance. Heats were 0.5% slower than semi-finals, which in turn were 0.2% slower than finals, in females and males . There was a significant interaction between Olympic venue and race type  for females and males, suggesting that performance differences between race types varied between Olympic venue locations. The percentage difference in swim times between heats and finals in Beijing (0.60%, average of males and females) was much smaller than in Athens and in London (0.99% and 0.93% respectively). A major difference between those Games is that the finals in Beijing were held at about the time of the heats in London and Athens, while the heats in Beijing were held at about the time of the finals in London and Athens. This scheduling difference is an interesting opportunity to disentangle motivation (faster swim times in the finals) from possible time-of-day effects. In fact, if time-of-day did not play a role, one would expect the same percentage difference in swim times between heats and finals in Beijing as in Athens and London. To test for time-of-day effects we fitted a sine model.

The linear mixed model indicated significant effects of race type, Olympic venue, and time-of-day.The sine fitted model predicted that swim performance would be worst in the early morning, and best in the late afternoon. There was no significant difference depending on sex, therefore the same sine wave was plotted for both males and females.

The amplitude range of the fitted sine wave representing the effects of time-of-day is 0.37% (peak-to-trough distance). In 40% of the finals, this time-of-day effect was larger than the time difference between gold or silver medal finishing times. Moreover, time-of-day effects exceed the time difference between the silver and bronze medal in 64% of the finals, and the time difference between bronze or fourth place in 61% of the finals.

 

Source: https://www.nature.com

Recent Posts

All

How melatonin supports the immune system

29 Januar 2021

The immune system is more relevant today than ever. This system ensures that we do not get sick from various...

Read More

A disrupted circadian rhythm affects our body and brain

29 Januar 2021

Your circadian rhythm is extremely important. We have said that many times, and we will keep telling you. Studies show...

Read More

Use light therapy to boost your libido

29 Januar 2021

Your sex drive can be disrupted in various ways, which causes a lower libido. This is a natural and common...

Read More

Useful tips for a healthy sleep- wake rhythm while working from home

29 Januar 2021

Special times require special solutions, one of those solutions is to work from home as much as possible. We no...

Read More

Morning walks can be beneficial to our health

29 Januar 2021

With the current situation regarding COVID-19, we are limited in quite a few different cases. We work from home as...

Read More

How light glasses could prevent excessive weight gain on people

29 Januar 2021

A person’s health can be expected to improve if light is used at the right time at the right wavelength....

Read More

Oversleeping has some serious health hazards

29 Januar 2021

There is a vast amount of research that indicates skimping on sleep can negatively affect your health in numerous ways....

Read More

Marathon running in combat outfit and with an adapted biological clock

29 Januar 2021

This article is written in Dutch by Joyce de Bruijn: https://amazingerasmusmc.nl/actueel/marathon-rennen-in-gevechtstenue-en-met-aangepaste-biologische-klok/ Professor of Chronobiology Bert van der Horst, professor of...

Read More

Recent studies show your biological rhythm controls the brain waste removal system

29 Januar 2021

A recent scientific revelation demonstrated that the internal body clock controls brain waste removal. Previously, it was believed that sleep...

Read More

5 Myths about sleep: Truth or Fiction?

29 Januar 2021

There are quite a few myths about sleep. We of course already know that sleep is immensely important for body....

Read More

Circadian variation strongly affects performance in Olympic athletes

29 Januar 2021

Your circadian rhythm is very important, we of course already knew that. There are a lot of applications where shifting...

Read More

Blue light: What is it? What does it do and how can be block it?

29 Januar 2021

What is blue light exactly? And how does it work? Are there glasses that filter blue light? There are quite...

Read More
ARCHIEF
De waardering van www.propeaq.com bij Webwinkel Keurmerk Klantbeoordelingen is 8.6/10 gebaseerd op 110 reviews.