Whereas IL-6 levels remained similar to baseline levels after one set of resistance exercises ( 30 min , P = 0.287 ; 60 min , P = 0.318 ) , IL-6 levels were > baseline levels at 60 min post-exercise after a two-set exercise trial ( 2.94 0.94 pg/ml , P = 0.002 ) and doubled at both 30 min ( 4.01 1.00 pg/ml , P = 0.048 ) and 60 min ( 4.28 1.25 pg/ml , P = 0.084 ) post-exercise after the three-set resistance exercise trial .