the trained group showed a significant reduction in heart rate during graded submaximal exercise testing when compared with the controls , and resting plasma levels of norepinephrine ( nontrained group , 331 +/- 99 pg/ml ; trained group , 142 +/- 30 pg/ml ; p less than .05 ) and epinephrine ( nontrained , 424 +/- 105 ; trained , 258 +/- 45 pg/ml ; p less than .05 ) were reduced significantly in the trained group .
C0428977
reduction
C0014563
epinephrine