The effect of eight weeks of supplementation with Eleutherococcus senticosus on endurance capacity and metabolism in humans 

The aim of this study was to examine the effects of Eleutherococcus senticosus (ES) supplementation on endurance capacity, cardiovascular functions and metabolism of recreationally trained males for eight weeks. This is the first well-conducted study that shows that eight week ES supplementation enhances endurance capacity, elevates cardiovascular functions and alters the metabolism for sparing glycogen in recreationally trained males. 

References:

Kuo J, Chen KW, Cheng IS, Tsai PH, Lu YJ, Lee NY. The effect of eight weeks of supplementation with Eleutherococcus senticosus on endurance capacity and metabolism in human. Chin J Physiol. 2010 Apr 30;53(2):105-11. doi: 10.4077/cjp.2010.amk018. PMID: 21793317. https://pubmed.ncbi.nlm.nih.gov/21793317/