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People who take plenty of exercise during their early 20s may benefit from stronger bones and a reduced risk of fractures in later life, new research reveals.

Scientists discovered that increasing exercise levels between the ages of 19 and 24 improved bone density in the hips, lower spine, arms and lower legs.

In contrast, those who cut back on exercise during early adulthood develop much more brittle bones.

Previous research has shown that the period before and during puberty is particularly important for bone development, but the latest study - which is published in the Journal of Bone and Mineral Research - indicates that the early 20s are also a significant time for bone growth.

The findings were made following a study conducted by scientists at the University of Gothenburg in Sweden involving 833 men.

Researcher Mattias Lorentzon, from the university's Sahlgrenska Academy, said: "The men who increased or maintained high levels of physical activity also developed larger and thicker bones in their lower arms and legs.

"These findings suggest that maintaining or, ideally, increasing physical activity can improve bone growth in our youth, which probably reduces the risk of fractures later on."

A spokesperson for Arthritis Ireland said: "Regular exercise is one of the best things a person can do both as a preventative measure against conditions, like arthritis and osteoporosis, and as a way of managing the symptoms of arthritis."

Arthritis Ireland is currently recruiting walkers for its nationawide network of walking groups. For more information or to register please call our walking hotline on locall 1890 252 846.