Yeh I don't like a lot of what she is doing lately but leaving a (probably very lucrative) deal with gymshark because of this does (imo)imply she really does know about itEh, she still has a very advanced degree in physical sciences, she is pretty qualified to interpret the literature. Not saying she’s infallible by any stretch but I’ve seen people on Reddit implying her education is useless for what she’s currently doing and I disagree.
She has had biophysics in her bio this whole time (which people also complain about lol), it’s not as if she is saying “sports scientist” when she’s not one.