Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Can’t serve an ace? Could be muscle fatigue


Fatigue could reduce skills and cause injuries and muscle weakness during sport because the brain does not consider the extra effort required for movement, Monash University researchers have found.

Professor Uwe Proske, from Monash’s Department of Physiology, found when muscles were weakened from overuse or fatigue, limb control was affected,particularly if the person couldn’t see their limbs.

The study, which has been published in the Journalof Physiology , showed muscles needed to work harder to compensate for fatigue, which led touncertainty about where the limb was. "In the absence of sight, people judge the position of their limbs based on the amount of effort required to lift them against the force of gravity," Professor Proske said. "Take gravity away, as happens to astronauts, and they have real trouble carrying out skilled movements.

"In our experiments we found that when the muscles in one arm were fatigued, the effort required to maintain a set arm position was much greater. When asked to keep both arms in a similar position, where one arm was fatigued and the other was not, the arms did not align. "That was unexpected. Previously it was believed that fatigue had nothing to do with the body’s sense of position," he said.

Professor Proske said the findings could have implications for sports that required skilled actions such as serving a tennis ball, throwing a javelin or shooting a bow and arrow. He said it could also result in loss of control over stride length during running - leading to stretched hamstrings and other injuries. "When a tennis player is serving, they don’t watch where their shoulders are, they rely on the brain’s knowledge of how much effort is required to maintain the best position, to get the ball where it needs to go. "However, if the limbs are fatigued the brain must activate them harder and this leads to errors about where the different body parts are located."

Professor Proske said the research could also offer insight into the symptoms of some motor system diseases such as Parkinson’s disease. The abnormal movements were likely to relate, in part, to a disturbed sense of effort, he said.

Penny Fannin | EurekAlert!
Further information:

More articles from Studies and Analyses:

nachricht Rutgers-led innovation could spur faster, cheaper, nano-based manufacturing
14.02.2018 | Rutgers University

nachricht New study from the University of Halle: How climate change alters plant growth
12.01.2018 | Martin-Luther-Universität Halle-Wittenberg

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

Im Focus: Locomotion control with photopigments

Researchers from Göttingen University discover additional function of opsins

Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

TRAPPIST-1 planets provide clues to the nature of habitable worlds

21.03.2018 | Physics and Astronomy

The search for dark matter widens

21.03.2018 | Materials Sciences

Natural enemies reduce pesticide use

21.03.2018 | Life Sciences

Science & Research
Overview of more VideoLinks >>>