the potassium concentration ( mean +/- s.e.m . ) dropped ( p less than 0.01 ) in serum from 4.64 +/- 0.37 to 3.19 +/- 0.43 mmol x l-1 in the first hour at rest and in plasma from 5.70 +/- 0.93 to 4.63 +/- 0.45 in 90 sec directly after exercise .
C0229671
serum
C0032105
plasma