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Table 2 Plasma pH and [HCO 3 - ] at rest and during cycle ergometer tests

From: Low-protein vegetarian diet does not have a short-term effect on blood acid–base status but raises oxygen consumption during submaximal cycling

Sample

pH

HCO3- (mmol/l)

 

ND

LPVD

ND

LPVD

PREdiet

7.467 ± 0.039

7.448 ± 0.028

33.6 ± 8.7

32.2 ± 6.0

POSTdiet

7.455 ± 0.028

7.454 ± 0.025

32.0 ± 5.5

31.9 ± 3.9

PREtest

7.466 ± 0.030

7.459 ± 0.015

32.9 ± 6.3

32.6 ± 4.5

Stage1

7.470 ± 0.029

7.473 ± 0.036

31.0 ± 3.1

31.7 ± 4.2

Stage2

7.459 ± 0.028

7.457 ± 0.031

28.6 ± 2.3

20.8 ± 3.3

Stage3

7.378 ± 0.039*

7.368 ± 0.029**

20.8 ± 3.3**

19.9 ± 2.2***

Stage4

7.326 ± 0.076*

7.336 ± 0.03***

16.7 ± 2.5**

18.4 ± 2.4***

  1. ND= normal diet.
  2. LPVD= low-protein vegetarian diet.
  3. PREdiet= a fasting blood sample taken in the morning before the start of ND or LPVD (day 1).
  4. POSTdiet= a fasting blood sample taken in the morning after a 4-day ND or LPVD (day 5).
  5. PREtest= a resting blood sample taken 30 min after a breakfast, before the cycle ergometer test (day 5).
  6. Stage1–4= blood samples taken after 10-min cycling at 40, 60 and 80% of VO2max and after the maximal stage (at 100% of VO2max until exhaustion).
  7. POSTdiet vs. Stage1–4 *= p<0.05; **= p<0.01; ***= p<0.001.