London: Exercises early on increase bone density and size, which may spell a reduced risk of osteoporosis later, says a study.
Around 3,200 men had their bones examined and their exercise habits mapped. Of these, just over 2,300 18-year-olds were selected at random to have their heel bone studied by the researchers.
The heel bone is particularly useful to study as it is directly impacted by exercise, being loaded with the full weight of the body.
"In this group, we found that those who actively did sports, and also those who used to do sports, had greater bone density than those who had never done sports," said Martin Nilsson, physiotherapist and a student at the Institute of Medicine, Sahlgrenska Academy, Sweden.
The researchers also looked at bone density and structure in the lower leg in around 360 19-year-old men who had previously done sports but had now stopped training.
They found that men who had stopped training more than six years ago still had larger and thicker bones in the lower leg than those who had never done sports.
"This result is particularly important, because we know that a bone with a large circumference is more durable and resistant to fractures than a narrower bone," says Nilsson.
The researchers also studied bone density throughout the body in around 500 randomly selected 75-year-old men, says a Sahlgrenska Academy release.
Those who had done competitive sports three or more times a week at some point between the ages of 10 and 30 had higher bone density in several parts of the body than those who had not.
The researchers have therefore established that there is a positive link between exercise while young and bone density and size. The connection is even stronger if account is taken of the type of sports done.