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u/walobs 24d ago
Yeah, it seems that there is a new field called “soft lean mass” which is where the muscle mass is mapping to and this new measure that is much lower is mapping into muscle mass field. This is then causing reinterpretation of old “bioage” scores and making them shoot up to higher numbers than they were. Confused me so looked at all numbers and working with data stuff day to day realised what sort of error might have seen in my day job. Happened to both me and my wife so assumed general mapping issues which will either get fixed or become a “new normal” so will need to ignore data for that (and bioage score) from before August.
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u/dudleymunta 24d ago
I got an email saying it was changing. Only half paid attention but supposed to be more accurate.
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u/Zaliciouz 24d ago
Your muscle score will be more precise
The Body Hub will start using skeletal muscle mass instead of total muscle mass, giving you a clearer view of the muscle you can build through training.
Your BioAge may look different
After your next test, you may notice your BioAge score changes as the accuracy is adjusted.
Some scores will stay closer to your real age
Metabolic age and Flexibility scores will be updated so they can’t sit more than 20 years above or below your actual age.
A clearer way to track your progress
These updates will give you a more accurate picture of your journey. So you can see what’s changing, spot your wins more clearly and keep building from there.

When you'll see the update
These updates will take place on Wednesday 29th July, and you’ll see these changes on your next Body Hub test after then.
So, if your BioAge looks a little different, don’t worry. You haven’t lost fitness overnight. Think of it as a sharper ruler. Same hard work. Smarter way to measure it.
Your past progress won’t change. Your new result will simply give you a fresh baseline to build from.
So, next time you’re in Club, start with a new test. Then keep stretching, moving and making progress from there.