The processes behind SR9009 are pretty complicated and well beyond a short article here. If you're the deep-dive research kind of reader, take a look at this paper published in Nature Reviews Drug Discovery in 2014 or this 2016 paper published in the International Journal of Molecular Sciences.
SR9009 has a significant impact on REV-ERBA, which impacts circadian control and has knock-on effects on the immune system, sleeping patterns, energy production, and general activity.
Activation of Rev-ErbA-α by SR9009 increases exercise capacity by increasing mitochondria counts in skeletal muscle.
REV-ERB is particularly influential in the tissues of the muscles, body fat, and liver. This suggests it could help boost fat burning, "switching off" the genes which store fat and increasing the number of mitochondria in the muscles.
