OK just because this whole science in the fitness industry thing gets me annoyed big time, here goes lol
Most of the studies (both good and bad) have specific contexts associated with whatever hypothesis is being tested regards fitness, strength, diet, whatever that relates to diet and training methods.
If something has been working, there's empirical evidence right there that it works, even if it's on a subject of one (ie yourself).
Fact is, while many things apply generally, when it comes down to it, much of what is diet and training related is also heavily impacted by each individual's circumstances, be that physical, psychological, lifestyle, etc.
So look at the science, yes, because you might learn something new that may apply to you and may help you find a more optimal way to approach your own training (or diet etc). But don't get dogmatic about "science vs bro science".
For the most part, a lot of the studies deal with issues that relate to elite athletes and for most of us, one would be splitting hairs and spending 99% effort wasted on what might be a 1% improvement.
Be open to learning from a variety of sources of information and evidence, and look at your own history and what works for you.
I'm really sick of all the "science bitch" hashtagging around the internet in relation to diet and fitness/training.
it usually leads to pointless arguments for which both sides tend to make ignorant comments and leads to trolling of the most stupid kind.
Opinions are not fact.
Probabiliities are not fact either and yet they seem to be quoted as such by "science groupies".
When I see someone quote "do you even science?" my response usually is "no, you probably don't, dude. but you think you do".
Best way to apply science to training in the every day is probably to focus on your movement patterns and biomechanics. forces, vectors, moment arms etc.
Rant over.
In my defence, I'm just a grumpy old physicist
PS fekking double blind studies (and variations) with some statistical analysis is not what scientific method is all about. Bloody applied sciences LOL