The National Safety Council of the United States recommends all children between the ages of 5 and 17 wear a helmet at all times.
However, the number of U.S. children in the top 5 percent of helmet use per capita has more than doubled since 1990.
The trend of using helmets among young children in this age group is particularly worrisome, experts say, because they may be more susceptible to the serious injuries that occur during motorcycle riding.
For children under 5, the rate of head injuries per 100,000 riding years has more or less doubled over the last 30 years, according to data from the Centers for Disease Control and Prevention.
There are no official figures on the number and type of head and neck injuries sustained by children who wear helmets.
In the first three months of 2017, the CDC reported an estimated 4,000 head injuries among children under the age of 5, more than double the number reported in the same period in 2016.
There were an estimated 2,200 head injuries and 5,300 neck injuries among those ages 5 and younger.
“There’s a lot of evidence that it’s a very risky behavior for kids to be using helmets, particularly for the older children,” said Jennifer Crouch, a medical director at the Center for Research on Children and Adolescence at the University of North Carolina at Chapel Hill.
“When you have a lot more children wearing helmets, it’s less likely to be as severe.
And children’s brains are more plastic, and they’re more susceptible.”
Children and teens who use helmets often have trouble adjusting to the helmet’s protective effect, said Julie Buell, a pediatrician and author of the book “Troubled Kids: The Hidden Health Effects of Riding,” which examines the impact of helmet wearing on children and teens.
“Kids are getting exposed to more helmet wearing and there’s more head injury risk, and the effects are worse when the kids are younger,” Bueell said.
BueLL said that if a child’s head is injured while riding a motorcycle, it usually occurs at the top of the helmet, in a helmet that has been designed with the child’s skull in mind.
She said that helmet use by children of any age should not be encouraged, and it should not happen if a helmet is not worn.
She suggested that parents use helmets and make sure children get plenty of breaks and supervision.
Buhll also said that helmets should not go unnoticed, even if they are not worn by every child.
“Children need helmets and they need supervision, and that’s why they wear helmets,” she said.
“That’s why helmets are so important.
But they should not just be the first thing you’re checking when you go to school.”
A new report from the U.K.-based Injury Research & Advocacy Centre (IRAC) estimates that 1.6 million children aged 0 to 17 are at risk of developing a concussion in the first year after they wear a motorcycle-related helmet.
Of those, 1.3 million have been diagnosed with a concussion and 1.4 million have experienced a mild concussion, according the report.
The report found that children who have a concussion are more likely to suffer permanent brain damage than children who don’t have one, but that only about one in every 100,0000 people who are injured on a motorcycle will experience a concussion.
The injury rate for helmet-wearing children is even higher than for children who do not wear helmets, according of the report, which was commissioned by the U:S.
The researchers said that it was too early to know what percentage of the 1.1 million children who wore a helmet had a concussion, but it could be as high as 90 percent.
The new report says that helmet wearing can increase a childs risk of concussion, particularly among children younger than 5.
The study found that boys and girls aged 5 and under had a higher concussion risk than boys and older children.
For instance, it found that in 2016, about 0.7 percent of the boys who wore helmets in the United Kingdom had a head injury compared to 0.1 percent of those who didn’t.
But it noted that there are other risks that children face, including higher rates of aggression, bullying and physical violence, including being hit and injured in a crash, as well as being less able to communicate and understand other people.
Staley also said it was important for parents to wear helmets and to encourage their children to wear them. “
But the vast majority of helmets that are currently being tested and sold are designed for use by people older than 5.”
Staley also said it was important for parents to wear helmets and to encourage their children to wear them.
“Parents should take every precaution to ensure their children are wearing a helmet and not getting injured in the event of