Tuesday, October 21, 2014

Media reports on rapid weight loss compared with slower weight loss.

Recently I heard in the general media reports of a study done at Melbourne University. The study reportedly compared two groups. One was set the objective of losing 1.5 kg per week over 12 weeks and the other was to lose 0.5 kg per week over 36 weeks.

For those interested this article is from a media report on SBS.

http://www.sbs.com.au/news/article/2014/10/16/crash-diets-rapid-weight-loss-better-gradual-weight-loss-study

From the general media I got the impression that after three years a significant portion of the total group had only put on 70% of their weight loss. This impression was actually incorrect. The figure was 71% of the test subjects had put on weight but no mention of the amount of weight seemed to be mentioned. I decided to search for a little more information.

The following is the abstract for the study published in The Lancet.

http://www.thelancet.com/journals/landia/article/PIIS2213-8587(14)70200-1/abstract

The interpretation from the study is the rate of weight loss does not affect the proportion of weight gain after 144 weeks.

In this extract there is some interesting additional information. One interesting outcome is of those who went on to the second phase of the study and completed the study (104 people) had regained most of their weight.

The rapid weight loss program was 450-800 calories is much lower than normal dieting so this is not something people should consider without strict medical supervision. The additional effects for three in the rapid weight loss groups is also interesting to note.

Overall there's interesting information in the articles but the media to me at least certainly did not indicate just how low the rapid diet was and that most participants had regained their weight who completed phase 2 of the study.

Kelvin Eldridge
NOTE: This site is for information purposes only and should under no circumstances be considered medical advice.

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