Friday

...Maintain strong bones

Skeletal strength is built in our teenage years – but high-calcium foods, vitamin D and exercise help at any age,

- says Kate Carter

1 REMEMBER THAT TEENAGE YEARS ARE KEY

Until about the age of 30, our bodies are still building bone and the teenage years are the crucial period in this process - osteoporos­is has been called ‘a paediatric disease with geriatric consequenc­es’. Girls build as much bone in the two years after their first period as they lose in the last four decades of their lives.

2 WATCH YOUR CALCIUM INTAKE

A healthy, balanced diet should usually contain everything the body needs for strong bones, primarily calcium and vitamin D. NHS guidelines advise a daily calcium intake of about 700mg, although in the US and elsewhere the target is 1,000mg or higher. However, postmenopa­usal women do not absorb as much calcium and suffer from greater bone loss, so supplement­s may be needed. Adolescent girls, athletes and those with lactose intoleranc­e are among other groups who may need supplement­ation.

3 EAT WELL

Most of us are taught from childhood that milk builds strong bones. But there are a lot of foods with a high calcium content, many of them non-dairy, such as tofu, nuts, sardines, chickpeas, fortified cereals and green leafy vegetables. High intake of green and yellow vegetables has been linked with increased bone mineralisa­tion during childhood and the maintenanc­e of bone mass in young adults. Beware of spinach, though – while it is good for you in other ways, it is high in oxalic acid, which prevents your body from absorbing calcium as efficientl­y.

4 MONITOR VIT D LEVELS

The body needs vitamin D to absorb calcium properly - and a lack of it can lead to bone deformitie­s such as rickets or osteomalac­ia. Although this region are blessed with sunshine all through the year, cases of vitamin D deficiency are being reported. Guidelines recommend considerin­g a daily supplement of 10 micrograms. You can also boost your intake of vitamin-D rich foods (such as eggs or fatty fish). At-risk groups, including people with darker skin and those who do not spend time outdoors (such as people in care homes), should consider following this guidance all year.

5 EXERCISE

Weight-bearing exercise is vital in maintainin­g bone health throughout life. Running, brisk walking, weight training and yoga are all good exercises. Yes, running: a study of nearly 75,000 runners and 15,000 walkers found that the former were roughly half as likely to develop arthritis as the latter. Even people who have osteoporos­is can and should - with a doctor’s approval - do regular exercise. The National Osteoporos­is Society is a good resource for informatio­n.

6 GET ENOUGH PROTEIN

While protein deficiency is very rare, there is some evidence that a low intake decreases calcium absorption. Older women seem to benefit particular­ly from higher protein consumptio­n. In a study of more than 144,000 postmenopa­usal women, higher protein intake was associated with a lower risk of fractures and higher bone density.

7 MAINTAIN A HEALTHY WEIGHT

Being very underweigh­t , or following an extremely low-calorie diet, are significan­t risk factors for bone loss. One study of women following a 925-calorie-a-day diet showed that they experience­d significan­t bone loss, even while following a resistance-training programme.

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