Featured Research

from universities, journals, and other organizations

Laser technology used to analyse Usain Bolt’s speed at Van Damme Memorial

Date:
September 21, 2011
Source:
Katholieke Universiteit Leuven
Summary:
Scientists have used advanced laser technology to measure and analyze Olympic Champion Usain Bolt's speed during his 9.76-second performance in the 100m sprint at the Van Damme Memorial on 16 September. It was the first time the technology has been put to use in competition. The new data will provide insights into improving the training regimens of world-class sprinters.

A team from the Faculty of Kinesiology and Rehabilitation Science has used advanced laser technology to measure and analyse Olympic Champion Usain Bolt's speed during his 9.76-second performance in the 100m sprint at the Van Damme Memorial on 16 September. It was the first time the technology has been put to use in competition. The new data will provide insights into improving the training regimens of world-class sprinters.

The team from K.U.Leuven is currently putting their expertise to work at elite training centres in China (Nanjing), South Africa (Stellenbosch) and the Netherlands (Papendal). "Biomechanically, the sprint is much more complex than one might expect at first glance," Professor Christophe Delecluse said. "The position and speed of the runner changes during the race and there are also a number of phases in the race, each with differing performance-deciding factors."

"With the laser, we can accurately measure an athlete's performance at each phase of the race. From this data, we can determine where the possible weaknesses are. Bolt's race times provide perfect phase-by-phase reference points from which to base our analyses of our own sprinters."

Bolt in 2009 versus Bolt in 2011

The K.U.Leuven team was able to measure Bolt's speed 300 times per second. Bolt finished the 100 metres in a time of 9.76 seconds. His top speed was 43.99 km/h (12.22 m/s), which he achieved after 67,13 metres. So what made the difference between his time at the Memorial and his world-record time of 9.58 seconds, run in Berlin in 2009?

According to the K.U.Leuven team's findings, Bolt lost ground in three zones:

1. He lost the most time during the first 4 strides of the race in Brussels. In the first 5 meters (approximately 4 strides) Bolt achieved a speed of 21.4 km/h, while in Berlin he reached 25 km/h in the same distance. In the following 3 strides, he made up for the lost speed and performed comparably to his world-record race.

2. In Brussels, Bolt's speed peaked at the 65m15 mark while in Berlin he accelerated for another pace before his speed decreased. His average speed in the first 75 metres was approximately 0.5 km/h higher in Berlin than in Brussels. His top speed in Berlin was 44.5 km/h. In Brussels it was 'just' 43.99 km/h.

3. In the last 10 meters, Bolt's speed was 0.5 km/h faster in Berlin than it was in Brussels.

Yohan Blake: new challenger?

Even if Usain Bolt's performance at the Memorial was a touch 'weaker' than in Berlin, his phase-by-phase scores remained high. Christophe Delecluse explains: "His only 'weak point' is his start, a logical consequence of his long body. His start at the Memorial wasn't stellar either. But that's relative: if you compare Bolt to previous top sprinters, he scores between 'good' and 'excellent' in every phase while Ben Johnson, for example, shined in the acceleration phase [but less so in other phases], and Carl Lewis could rely on his phenomenal top speed."

Meanwhile, a new sprint phenom has arrived on the scene. Yohan Blake, Bolt's 20 year-old training partner, clocked a 200m time of 19.26 seconds at the Memorial, just a fraction behind Bolt's outdoor world record. "Blake had another awful start," Delecluse said. "With better reaction speed, he would have come in under Bolt's record."

"After Bolt I thought the top sprinters would fit one mould: runners with long legs who managed nonetheless to achieve high speeds. But Yohan Blake is far from tall. That's why our research remains so interesting: the elite sprinters in the men's events tend to have very different body types. The differences between each sprinter can only be revealed through a detailed analysis of each phase of their race."


Story Source:

The above story is based on materials provided by Katholieke Universiteit Leuven. Note: Materials may be edited for content and length.


Cite This Page:

Katholieke Universiteit Leuven. "Laser technology used to analyse Usain Bolt’s speed at Van Damme Memorial." ScienceDaily. ScienceDaily, 21 September 2011. <www.sciencedaily.com/releases/2011/09/110921142032.htm>.
Katholieke Universiteit Leuven. (2011, September 21). Laser technology used to analyse Usain Bolt’s speed at Van Damme Memorial. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2011/09/110921142032.htm
Katholieke Universiteit Leuven. "Laser technology used to analyse Usain Bolt’s speed at Van Damme Memorial." ScienceDaily. www.sciencedaily.com/releases/2011/09/110921142032.htm (accessed October 20, 2014).

Share This



More Health & Medicine News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How Nigeria Beat Its Ebola Outbreak

How Nigeria Beat Its Ebola Outbreak

Newsy (Oct. 20, 2014) The World Health Organization has declared Nigeria free of Ebola. Health experts credit a bit of luck and the government's initial response. Video provided by Newsy
Powered by NewsLook.com
Another Study Suggests Viagra Is Good For The Heart

Another Study Suggests Viagra Is Good For The Heart

Newsy (Oct. 20, 2014) An ingredient in erectile-dysfunction medications such as Viagra could improve heart function. Perhaps not surprising, given Viagra's history. Video provided by Newsy
Powered by NewsLook.com
Ebola Worries End for Dozens on U.S. Watch Lists

Ebola Worries End for Dozens on U.S. Watch Lists

Reuters - US Online Video (Oct. 20, 2014) Forty-three people who had contact with Thomas Eric Duncan, the first person diagnosed with Ebola in the U.S., were cleared overnight of twice-daily monitoring after 21 days of showing no symptoms. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Fauci: Ebola Protocols to Focus on Training

Fauci: Ebola Protocols to Focus on Training

AP (Oct. 20, 2014) Dr. Anthony Fauci, head of the National Institute of Allergy and Infectious Diseases, says he expects revised CDC protocols on Ebola to focus on training, observation and ensuring health care workers are more protected. (Oct. 20) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins