SkM	skeletal muscle
ECG	epicatechin gallate
TM3	Leydig cells
T	Testosterone
IGF-I	insulin-like growth factor-1
H&E	hematoxylin and eosin
TEM	transmission electron microscopy
CSA	cross-sectional area
DEGs	differentially expressed genes
PPI	protein–protein interaction
TNF-α	tumor necrosis factor-α
IL-6	interleukin-6
MPCs	muscle progenitor cells
UGTs	glucuronosyltransferases
UDPGA	uridine diphosphate glucuronic acid
mTOR	mammalian target of rapamycin
HPT	hypothalamus pituitary testis