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Kids Develop Bone Disease If They Start Farming at Young Age

by Rajashri on July 15, 2008 at 4:39 PM
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 Kids Develop Bone Disease If They Start Farming at Young Age

A study led by an Indian origin researcher has revealed that kids who take up farming activities at a young age are vulnerable to developing bone disease in later life.

The University of Cincinnati (UC) study, suggested that excessive weight-bearing activities-such as squatting, kneeling or lifting-could affect the mechanical properties of developing bone.

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They say this could leave junior farmers more susceptible to degenerative skeletal disorders later in life.

"Research has clearly shown that healthy adults who engage in excessive weight-bearing activities often develop bone disorders," explains Amit Bhattacharya, PhD, a UC professor of environmental health and principal investigator of the study.
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"These excessive, repetitive weight-bearing activities could cause irreparable trauma and impair growth in young children whose bones are still developing," he added.

In the study, Bhattacharya's team wanted to know if high levels of load-bearing activity done repetitively, such as shoveling chicken feed, would cause changes in the mechanical properties of bone-specifically, mass and structural strength.

The team recruited 36 boys, age 12 to 19, from Butler County, Ohio, to study the biomechanical properties of developing bone. Eighteen boys had a history of regular work on family farms and the remainder were not involved in farm-related activities.

Researchers developed a list of 22 tasks children of this age might be asked to do. Each boy was surveyed about the tasks he performed to split participants into farm and non-farm groups.

In order to gauge overall bone health, the team took two measurements: bone mass, which is a measure of how much bone exists, and dynamic bone quality, the bone's ability to sustain incoming force during physical activity.

A person's bone mass continues to accumulate up through their mid 20s.

"If bone is unable to adequately absorb incoming shockwaves, it can cause microdamage and eventually crack," said Bhattacharya.

"When it happens at a lower level, the body can recover. But if happens too much and more frequently in developing bone, it may predispose these children to degenerative skeletal disorders later in life," he added.

The UC study showed that young boys who participated in regular farming activities had significantly lower bone-damping ability compared to the non-farming group.

"Damping" refers to the bone's ability to absorb shock when the heel strikes the ground.

Bhattacharya points out that weight-bearing activities are not bad-it's excessive activity in this age group that causes concern.

The study is published in the June 2008 issue of Journal of Agromedicine.

Source: ANI
RAS/L
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