Featured Research

from universities, journals, and other organizations

Physical activity in childhood may lead to stronger knee structure as an adult

Date:
November 11, 2012
Source:
American College of Rheumatology (ACR)
Summary:
Being more physically active in childhood is linked to greater knee cartilage and tibial bone area in adulthood, according to new research findings.

Being more physically active in childhood is linked to greater knee cartilage and tibial bone area in adulthood, according to new research findings presented this week at the American College of Rheumatology Annual Meeting in Washington, D.C.

Knee osteoarthritis is caused by cartilage breakdown in the knee joint. Factors that increase the risk of knee osteoarthritis include obesity, age, prior injury to the knee, extreme stress to the joints, and family history. In 2005, 27 million Americans suffered from osteoarthritis, and one in two people will have symptomatic knee arthritis by age 85.

While physical activity in childhood is often recommended as a means to improve adult joint health and function, little evidence exists to illustrate the correlation between childhood physical performance measures and bone structure in adulthood later on. The goal of the study was to determine if physical activity in youth was associated with more knee cartilage and tibial bone area (the bone that forms the distal part of the knee joint) 25 years later, says Graeme Jones, MD, PhD, investigator in the study and professor of rheumatology and epidemiology at Menzies Research Institute in Hobart, Tasmania.

Real-time data was gathered in 1985 on the childhood physical performance in a diverse group of 298 people in Australian. Of these, 48.7 percent were female and ages ranged from 31 to 41. The participant's knee cartilage and tibial bone area were measured using T-1 weighted, fat-suppressed magnetic resonance imaging.

Although Dr. Jones and his colleagues had questionnaire responses on the physical activity level of the children taken in 1985, they found that current-day measurements revealed more accurate information.

Adjustments were made for age, gender, body mass index and past joint injuries that may affect the cartilage or bone area. The results showed that childhood physical activity, including physical work capacity, leg and hand muscle strength, sit-ups, and long and short runs had a significant, consistent association with greater tibial bone area. In addition, higher childhood physical work capacity measures were associated with greater tibial cartilage area. Other types of physical activity in childhood were associated with greater cartilage area, but these measures were less significant after adjusting for medial tibial bone area.

Dr. Jones and his colleagues do not know exactly why or how physical activity may build bone and cartilage years later. "The mechanism is uncertain, but I would contend that bone area gets larger to cope with the extra demands put on it by higher levels of physical activity, and then this lead to more cartilage, as cartilage covers the surface of bone," he says.

While the study's findings lend greater support to the effort in many developed countries to encourage children to be more physically active, cartilage and bone are still vulnerable to damage later on that could contribute to OA, says Dr. Jones.

"Physical activity is good, but if people have an injury while doing the physical activity, this is bad. So injury prevention is important. Avoiding a high body mass index is also important, and physical activity will help with this."

This study was funded by NHMRC of Australia.


Story Source:

The above story is based on materials provided by American College of Rheumatology (ACR). Note: Materials may be edited for content and length.


Cite This Page:

American College of Rheumatology (ACR). "Physical activity in childhood may lead to stronger knee structure as an adult." ScienceDaily. ScienceDaily, 11 November 2012. <www.sciencedaily.com/releases/2012/11/121111153559.htm>.
American College of Rheumatology (ACR). (2012, November 11). Physical activity in childhood may lead to stronger knee structure as an adult. ScienceDaily. Retrieved September 18, 2014 from www.sciencedaily.com/releases/2012/11/121111153559.htm
American College of Rheumatology (ACR). "Physical activity in childhood may lead to stronger knee structure as an adult." ScienceDaily. www.sciencedaily.com/releases/2012/11/121111153559.htm (accessed September 18, 2014).

Share This



More Health & Medicine News

Thursday, September 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Artificial Sweetener Could Promote Diabetes

Artificial Sweetener Could Promote Diabetes

Newsy (Sep. 17, 2014) Doctors once thought artificial sweeteners lacked the health risks of sugar, but a new study says they can impact blood sugar levels the same way. Video provided by Newsy
Powered by NewsLook.com
Ebola Vaccine Trial Gets Underway at Oxford University

Ebola Vaccine Trial Gets Underway at Oxford University

AFP (Sep. 17, 2014) A healthy British volunteer is to become the first person to receive a new vaccine for the Ebola virus after US President Barack Obama called for action against the epidemic and warned it was "spiralling out of control." Duration: 01:02 Video provided by AFP
Powered by NewsLook.com
Obesity Rates Steady Even As Americans' Waistlines Expand

Obesity Rates Steady Even As Americans' Waistlines Expand

Newsy (Sep. 17, 2014) Researchers are puzzled as to why obesity rates remain relatively stable as average waistlines continue to expand. Video provided by Newsy
Powered by NewsLook.com
President To Send 3,000 Military Personnel To Fight Ebola

President To Send 3,000 Military Personnel To Fight Ebola

Newsy (Sep. 16, 2014) President Obama is expected to send 3,000 troops to West Africa as part of the effort to contain Ebola's spread. Video provided by Newsy
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:
from the past week

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