Table 1. Urine flow rate, urine to serum osmolality ratio, and urinary excretion of electrolytes during exercise. Values are mean (SD) for 7 subjects.
NF VF PF FF
UFR (ml·min–1)
  Pre 1.04 (.77) .85 (.35) .88 (.61) .95 (.67)
  Post .29 (.11) * .36 (.16) .42 (.17) .51 (.23)
U/Sosm
  Pre 3.3 (.8) 3.3 (.4) 3.3 (.9) 3.2 (.8)
  Post 3.2 (.3) 3.4 (.1) 3.3 (.4) 3.6 (.5)
UNa+V (μmol·min–1)
  Pre 179 (73) 175 (117) 162 (85) 152 (41)
  Post 59 (39) * 72 (45) 80 (68) 88 (71)
UK+V (μmol·min–1)
  Pre 44 (22) 38 (11) 34 (18) 38 (14)
  Post 38 (14) 45 (24) 55 (29) 55 (31)
UClV (μmol·min–1)
  Pre 161 (57) 161 (94) 154 (77) 183 (151)
  Post 73 (46) 97 (55) 99 (63) 113 (73)
* p < 0.05 denotes a significant difference from pre-exercise.UFR, urine flow rate; U/Sosm, urine to serum osmolality ratio; UNaV, urinary excretion of sodium; UKV, urinary excretion of potassium; UClV, urinary excretion of chloride.