[bradreaves2]

It's worth noting that this is a paper from 2014. The premise seems well-known now, but I wonder if it was as strong then?

I agree root cause analysis would be more interesting, but it wouldn't be justified until the base phenomena was validated.

Sure, people who do exercise think it helps stress and anxiety, but lots of people also find homeopathic remedies to be helpful. Papers like this show the former stand up under experimentation and the later don't.

[somethingsome]

I think that in 2014 it was already well known, there are several meta-analysis that precede this work. yes research is important, even just to state common knowledge, I just find the paper lacking depth and sources, making it not that interesting.

There is no follow-up of this research by the authors, and their research is not really focused on something in particular, I've the impression that it's just another paper on the subject.

[mistrial9]

there was a lot of popular science on sports training in the 1980s.. perhaps related to new, excellent measurement of blood content at different stages of exercise? a fallout of that science was the steriods era in US pro sports