I’m mobile now or I’d look up studies to post, but I’d recommend checking out pubmed on some of the more common adaptogens. I specifically am a fan of ashwagandha (the KSM-66 standardized extract), Rhodiola (again, standardized) and finally Holy Basil. But there are quite a bit more that fall into the category, some being more for mental benefits and others more physical. For example the mushroom Cordyceps is generally thought of as an adaptogen that has exercise endurance boosting effects, while ashwagandha is usually thought of more for stress management and brain boosting effects.
I’m usually not a fan of “all-in-one” type products, but I’ve been taking this adaptogen complex for months with noticeable effects. https://www.amazon.com/ADAPTOTRAX-Superior-Adaptogen-Supplem...
Edit (on desktop now). Just a dusting of some cool studies:
Cordyceps militaris Improves Tolerance to High-Intensity Exercise... - https://www.ncbi.nlm.nih.gov/pubmed/27408987
Ashwaganhda decreases cortisol and anxiety - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3573577/
Ashwagandha increases muscle strength and recovery - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4658772/
Rhodiola has lots of great stuff about it, but this "systematic review" claims that none of the results really meet scientific standards, so it all might be bogus: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3541197/