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High impact, jumping workouts are an effective bone loading activity

It does this because the impact generated by exercise compresses the bone matrix, triggering the bone to take in calcium and other minerals and thereby increasing bone density. The amount of weight bearing needed to trigger this response is called osteogenic loading because it takes a certain ‘load’ to stimulate the bone building cells. This ‘bone loading’ is essential if people are to maintain a healthy skeletal system, and we expect more spas and fitness centres to add bone loading workout options, as the demand for wellness services increases and people are more aware of the need to work hard to ensure a healthy older age.

WHAT LOAD IS NEEDED? When it comes to the impact of exercise on bone health, scientists measure activities according to how many multiples of body weight they load onto the skeleton. A study led by musculoskeletal specialist Kevin Deere at the University of Bristol, UK looked at the bone loading which was needed to stimulate bone mineralisation in teenagers and found the amount of loading required was 4.2 times their body weight*. This means if you weigh 130 pounds, you need to load your bones with 546 pounds to trigger bone building.

The impact generated by exercise compresses the bone matrix, triggering the bone to take in calcium and other minerals and thereby increasing bone density

At rest, gravity applies a load to our bones which equals that of our body weight. Activities such as walking, jogging or running add more load, but much higher impact is needed to achieve a load of four times bodyweight, with weight training, plyometrics or jumping being options. Although the researchers cautioned the extrapolation of these results into other population groups, the results nevertheless highlight that light exercise is unlikely to be as effective.

WHY OFFER IT? Spas which add bone loading to their repertoire will be able to better serve guests and members, as well as enabling them to take steps to improve their longterm health, longevity and quality of life. Researchers point out that while exercise such as cycling and swimming have excellent health benefits in areas such as flexibility, strength and cardiovascular capacity, they effectively ‘unload’ the bones, so anyone who focuses exclusively on these

types of exercise and are without bone loading in their routine as a result, may be susceptible to osteoporosis and would be advised to add more weight bearing activity to their workout programme. Another area for consideration is the advice which people get to enable them to make the right exercise choices, as it’s important they avoid overloading and creating other musculoskeletal issues. It’s suggested that anyone with low bone density or osteoporosis works with a fitness professional to ensure that bone loading is done progressively and without causing harm. ● * Source: Deere, et al. Habitual levels of high, but not moderate or low, impact activity are positively related to hip BMD and geometry. JBMR, September 2012

Liz Terry is the editorial director of Spa Business magazine ■ lizterry@leisuremedia.com

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