Mayo researchers note that stronger leg muscles can protect against knee osteoarthritis
Stronger quadriceps muscles in the legs can help protect against cartilage loss behind the kneecap, according to Mayo Clinic researchers presenting preliminary study data at the American College of Rheumatology Annual Meeting on Nov. 15.
Knee osteoarthritis (OA) occurs when the cartilage that cushions the ends of the bones in the knee joint deteriorates over time. As this cushion wears down, the joint doesn't function as well and may be painful.
Mayo researchers, in collaboration with researchers from Boston University and the University of California, San Francisco, studied 265 men and women diagnosed with knee OA. They performed magnetic resonance images (MRIs) of participants' knee joints at the beginning of the study and again at 15 months and 30 months. Based on these MRIs, researchers determined how much cartilage loss occurred over time at the two joints of the knee: the tibiofemoral joint, where the thigh bone (femur) meets the lower leg bone (tibia); and the patellofemoral joint, behind the kneecap (patella).
When the study began, researchers also had measured the strength of participants' quadriceps muscles (leg muscles in the upper thigh). Analyzing these measurements, researchers observed that participants who had greater quadriceps strength had less cartilage loss within the lateral compartment of the patellofemoral joint, which is frequently affected by OA.
"A stronger quadriceps muscle helps keep the patella from moving laterally and tracking abnormally with movement," says Shreyasee Amin, M.D., Mayo rheumatologist and the study's lead researcher. "Our study results emphasize that it's important to encourage people with knee osteoarthritis to maintain strong quadriceps muscles as recommended by their physician."
Facts about osteoarthritis (OA)
The exact cause of OA isn't known. Researchers suspect a combination of factors, including being overweight, the aging process, joint injury or stress, heredity and muscle weakness. Pain is the major complication of OA. The degree of pain can vary greatly, from mild inconvenience to a debilitating condition that interferes with daily activities.
Sara Lee | EurekAlert!
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...