During a stable isotope infusion trial ( l - -LSB- ring - ( @ ) C@ -RSB- Phe ; l - -LSB- @ - ( @ ) C -RSB- Leu ) , older men performed RE and , at @ h after exercise , ingested @ g of essential amino acids ( EAAs ) containing either a Leu content similar to quality protein ( control , @ g of Leu , n = @ ) or enriched Leu ( LEU ; @ g of Leu , n = @ ) .