Here is what they found out.

The study lasted for a year, after which the researchers followed up with the participants, asking them how they thought they had fared. The researchers found that the exercisers gained an average weight of 0.6 kg, with over half of the participants seeing gains of between 1.5 kg and 4.5 kg.

The exercisers were also asked how they felt physically, and they too were surprised at the results. The participants' scores showed that they perceived themselves to be substantially fitter than when they started. This perception of physical improvement was in sharp contrast with the other findings. The study authors suggested that the exercise session may have triggered a placebo or a placebo effect.

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They speculated that the volunteers may have become more aware of their own bodies because of regular exercise, and this awareness has been seen to be associated with healthier eating and lifestyles. They went on to explain their findings as though the results could be interpreted as evidence of the beneficial aspects of exercise. "If something as simple as a 10-minute jump rope workout has a significant impact on body composition, and is also associated with a reduction in body fat, then perhaps what we are doing is actually good for us all the time." The study was carried out on healthy females.

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But the researchers point out that their findings might be repeated using similar methods on the more at-risk male population. So far only one small study has looked at the benefits of exercise for the frail elderly, and the authors suggested that such research might be worthwhile. If the benefits of exercise are replicated in clinical studies in the frail elderly, this would be potentially important to many people, as it may mean that exercise would not just be beneficial from an immediate health perspective, but also in maintaining their present health and quality of life.