Earlier this year, doctors urged schools to ban tackling in rugby - concerned that concussions can cause life long consequences for children.
The dangers of concussion caused by a blow to the head have been well recognised in recent years. Now the impact in the sport of horse racing has been re-examined.
New rules have been announced to help ensure jockeys are looked after at race meetings. And the British Horseracing Authority is urging trainers and owners to have a better understanding of the condition. Penny Silvester reports from Lambourn, the Valley of the Racehorse.
Pictures from Racing UK.
The Christmas holidays may mean feet up, telly on and a break from work for many of us.
But at stables across the region, the alarm will still ring before daybreak on Christmas morning.
This is one of the busiest times of the year in horse racing as Chris Maughan now explains.
Brighton Racecourse has had a colourful history. Once frequented by King George IV and his aristocratic pals, it was later portrayed as the haunt of gangsters and racketeers in Graham Greene's book "Brighton Rock".
Now, a group of students have been behind the scenes to find out what it's really like today.
Malcolm Shaw joined the boys for a day at the races, and interviewed Wayne Hardie of the British Horseracing Authority, Colin Brown, tipster and former jockey, and race commentator Richard Hoiles.
It's the annual Ladies' Day at Royal Ascot today. Women from across the region and beyond are attending the horse racing event wearing their most fashionable outfits for the Gold Cup. Dress code assistants are on hand to ensure racegoers don't flout the rules.
Christopher Hall has held many of the top jobs in horse racing - and counts some of the world's top jockeys and their trainers as his friends.
Mr Hall, who lives in East Sussex, has devoted much of his life to improving the lives of horses.
And now he has written a book about his experiences. Abigail Bracken went to Eridge to meet him.
While many of us will be enjoying the excesses of the festive season - and then sleeping them off - there'll be plenty of sportsmen and women who'll be working through Christmas. Footballers have matches to prepare for on Boxing Day.
And in racing it's one of the busiest times of the year. Stable staff across the country will be setting their alarms early on
On Christmas Day the horses still have to fed and exercised. And there are nine meetings across the country on Boxing Day.
Chris Maughan has been to one yard where they're hoping a big race favourite will deliver a festive winner.
Horse racing has been paying tribute to one of the great trainers of recent times. Toby Balding, who trained more than 2000 winners in a career which spanned more than half a century, has passed away aged 78.
The racing world is in mourning for Toby Balding, the racehourse trainer from Hampshire who has died aged 78. He was one of the few in the profession to have won the Grand National, Cheltenham Gold Cup and the Champion Hurdle. He was based at Fitfield near Andover.
Over 10,000 people are expected to meet race horses and trainers in Berkshire today.
Stables throughout the Lambourn Valley have opened their doors to the public so they can get an unique insight into how the racing industry really works.
Many of the stables have special exhibits and some demonstrations, including horses using hydrotherapy pools.