Bone loss

Keeping fit
Brittle bones is a problem in women over 60
50% of women over 60 years of age suffer from brittle bones. As seen through a microscope, the centre of the bone seems to be eaten away. This leads to a marked increase in fractures of the hip, wrist or spine. The problem is largely caused by illness and lack of exercise.
A similar problem also occurs in the weightlessness of space, when even the youngest, fittest astronauts suffer some bone loss.
Space research is helping scientists to understand what happens and to find a way to combat the problem.
One method is to use volunteers who stay in bed for many weeks. These bed rest studies show how bones change when no weight is being put on them.
ESA is also developing new exercise machines and medical equipment for use on Earth and in space.
One device tested on ESA microgravity flights is a step-on, step-off machine. Another mimics normal walking and running by testing the effects of vibrations on bone.
Last update: 19 October 2011


Living in space

 •  A day in space (http://www.esa.int/esaKIDSen/SEMQ1JWJD1E_LifeinSpace_0.html)
 •  Learning to live together (http://www.esa.int/esaKIDSen/SEM52JWJD1E_LifeinSpace_0.html)
 •  Washing up (http://www.esa.int/esaKIDSen/SEMU7JWJD1E_LifeinSpace_0.html)
 •  Meals for Martians (http://www.esa.int/esaKIDSen/SEMQ8F1DU8E_LifeinSpace_0.html)
 •  Gravity and weightlessness (http://www.esa.int/esaKIDSen/SEMG2JWJD1E_LifeinSpace_0.html)
 •  Spacewalks (http://www.esa.int/esaKIDSen/SEM2GO6TLPG_LifeinSpace_0.html)
 •  Weightless experiments help industries on Earth (http://www.esa.int/esaKIDSen/SEMYWUOZVAG_LifeinSpace_0.html)
 •  Weak muscles (http://www.esa.int/esaKIDSen/SEMOD6XDE2E_LifeinSpace_0.html)
 •  Bed rest (http://www.esa.int/esaKIDSen/SEM9D6XDE2E_LifeinSpace_0.html)