Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Twist and ouch

26.03.2002


Women don’t bend as much as men do when they land a jump.


Scientists make strides in the study of women’s sports injuries.

Straighter legs and knock-knees may be causing female athletes to tear knee ligaments more frequently than males. The finding could help coaches to shape women’s training to reduce such injuries.

When researchers at the University of North Carolina spotted that women land with their knees straighter and closer together than do men, they asked the athletes to spring on and off platforms that measure force in several directions. This revealed that women also put more twisting force on their knees1.



Sudden twisting or excess pressure at a knee joint can stretch or tear the anterior cruciate ligament, or ACL, which connects the thigh bone to the shin bone. Often accompanied by a sickening pop, ACL injuries are nearly eight times more common in women than men in sports such as basketball, soccer or volleyball.

Women may put more force on their knees because they tend to use their quadriceps, rather than their hamstrings, to jump and turn. Training female athletes to decelerate using their leg muscles differently and to bend more at the knees when they land could prevent many ACL injuries.

G. Guerrieri women’s soccer coach at Texas A&M University, certainly thinks so. "In the autumn 2000 season, we had six ACL injuries. In the spring of 2001, we had zero," says Guerrieri. In the interim the team participated in a pilot biomechanics-based injury-prevention program inspired by earlier work from the University of North Carolina team.

Previous studies of knee injuries in women have focused on physical variables, such as ligament size or menstrual cycle. As Bing Yu, one of the UNC scientists, explains, "most people were unaware of motor control as a problem that brings women closer to the point of injury".

Hormones and anatomical differences certainly contribute to injury risk. But, as sports injury researcher Julie Gilchrist of the Centers for Disease Control and Prevention in Atlanta, Georgia points out, "you can’t pull a player from the game because she’s getting her period". You can, however, train her to move safely.

References

  1. Chappell, J.D., Yu, B., Kirkendall, D.T. & Garrett, W.E. A comparison of knee kinetics between male and female recreational athletes in stop-jump tasks. American Journal of Sports Medicine, 30, 261 - 267, (2002).


JESSICA PROKUP | © Nature News Service

More articles from Health and Medicine:

nachricht NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures
17.11.2017 | National Institute of Standards and Technology (NIST)

nachricht High speed video recording precisely measures blood cell velocity
15.11.2017 | ITMO University

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>