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.