|Figure 1: Cordyceps sinensis |
(photo NW Botanicals)
The Indian scientists investigated the effect of 200 mg/kg of air-dried cordiceps powder (human equivalent approx. 33mg/kg) to rats for 15 days. The 24 rats were randomized to one out of four groups: control (C), CS supplemented without exercise (CSS), exercise (E, swimming exercise 1h/day without load) and CS supplemented along with exercise (CSS + E) groups. On day 16 all rats were subjected to a exhaustive swimming protocol, in order to differentiate effects of supplementation / training on exercise performance. The results were quite impressive:
Both CS supplementation and supplementation concurrent with exercise improved exercise endurance by 1.79- (P < 0.05) and 2.9-fold (P < 0.01) respectively as compared to placebo rats. CS supplementation concurrent with exercise also increased the swimming endurance by 1.32-fold (P < 0.05) over the exercise group.What is yet even more interesting, is the data related to the underlying mechanism(s) of these performance improvements:
To study the molecular mechanism of the observed effect, we measured the expression levels of endurance responsive skeletal muscle metabolic regulators AMPK, PGC-1α and PPAR-δ as well as endurance promoting and antioxidant genes like MCT1, MCT4, GLUT4, VEGF, NRF-2, SOD1 and TRX in red gastrocnemius muscle.Taken together this molecular changes, which took place in trained and untrained animals, are responsible for an upregulation of skeletal muscle metabolism, angiogenesis, better glucose and lactate uptake, as well as adaptations in the anti-oxidant response to exhaustive exercise.
|Figure 2: Chemical structure of Cordycepin, the purported |
working ingredient in Cordyceps sinensis (Wikipedia)
Combine these results with the recently confirmed (Leu. 2011) stimulatory effect of cordycepin (fig. 2) on Leyding Cells and, via luteinizing hormone, testosterone production and you have a perfect natural ergogenic.