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Table 2 PTSR-related blood gas parameters in the bicarbonate supplementation and control groups under normoxia and hypoxia, and delta values

From: Effects of daily ingestion of sodium bicarbonate on acid-base status and anaerobic performance during an altitude sojourn at high altitude: a randomized controlled trial

 PO2
[mmHg]
PCO2
[mmHg]
saO2
[%]
pHb[HCO3] [mmol/L]BE
[mmol/L]
N
O
R
BICPRE PTSR99.6 ± 23.232.2 ± 10.797.6 ± 1.27.44 ± 0.0421.7 ± 6.1−2.4 ± 5.6
POST PTSR94.4 ± 11.438.3 ± 4.895.8 ± 1.57.26 ± 0.0217.4 ± 1.8−9.7 ± 1.9
DIFF PTSR−5.2 ± 30.16.1 ± 11.0− 1.8 ± 2.2− 0.18 ± 0.04− 4.3 ± 6.0−7.3 ± 5.6
CONPRE PTSR82.6 ± 7.938.7 ± 3.196.1 ± 1.47.42 ± 0.0224.9 ± 1.30.3 ± 1.1
POST PTSR90.2 ± 7.938.7 ± 3.895.5 ± 1.17.26 ± 0.0217.6 ± 2.0− 9.5 ± 2.1
DIFF PSTR7.6 ± 9.7− 0.0 ± 2.9− 0.7 ± 1.6− 0.15 ± 0.04−7.3 ± 1.3− 9.8 ± 1.7
H
Y
P
BICPRE PTSR49.4 ± 2.531.6 ± 1.988.9 ± 1.77.52 ± 0.03*26.0 ± 2.1*3.2 ± 2.4*
POST PTSR57.3 ± 5.430.6 ± 1.889.4 ± 2.87.40 ± 0.03*18.8 ± 1.2*− 6.0 ± 1.6*
DIFF PTSR7.8 ± 4.9− 1.0 ± 0.50.5 ± 2.6− 0.13 ± 0.01*−7.2 ± 0.9− 9.2 ± 0.9
CONPRE PTSR54.2 ± 5.128.4 ± 2.289.6 ± 3.07.46 ± 0.0120.1 ± 1.3− 3.8 ± 1.2
POST PTSR58.3 ± 3.328.4 ± 4.387.1 ± 1.67.29 ± 0.0312.6 ± 1.5− 14.1 ± 1.9
DIFF PTSR4.0 ± 7.70.0 ± 3.2−2.6 ± 3.8− 0.17 ± 0.03−7.4 ± 1.6−10.3 ± 1.9
BICPRE PTSR−50.2 ± 23.0−0.6 ± 10.8−8.7 ± 2.30.08 ± 0.064.4 ± 5.1*5.6 ± 4.3*
POST PTSR−37.2 ± 13.0− 7.7 ± 3.9−6.5 ± 2.90.14 ± 0.041.5 ± 1.6*3.7 ± 2.2*
DIFF PTSR13.0 ± 27.0−7.0 ± 10.92.3 ± 1.60.06 ± 0.38*− 2.9 ± 5.7−1.9 ± 5.4
CONPRE PTSR−28.3 ± 10.8− 10.4 ± 1.8−6.5 ± 3.60.04 ± 0.02−4.8 ± 0.6−4.1 ± 0.7
POST PTSR−31.9 ± 9.8− 10.3 ± 4.1−8.4 ± 2.20.02 ± 0.05− 4.9 ± 2.4−4.6 ± 3.0
DIFF PTSR−3.6 ± 16.90.1 ± 4.0−1.9 ± 4.8−0.02 ± 0.05−0.1 ± 2.3−0.5 ± 3.1
  1. Data presented as mean ± standard deviation. PO2 Oxygen partial pressure, PCO2 Carbon dioxide partial pressure, saO2 Oxygen saturation, pHb Blood pH value, [HCO3] Blood bicarbonate concentration, BE Base excess, BIC Bicarbonate supplementation group (n = 5), CON Control (n = 5), NOR Normoxia, HYP Hypoxia, PTSR Portable tethered sprint running test, PRE PTSR Pre-PTSR values, POST PTSR Post-PTSR values, DIFF PTSR Difference between pre- and post-PTSR values (DIFF = POST – PRE). ∆ = HYP minus NOR. For further details see Materials and Methods section. *p < 0.05 vs. CON. For p-values see results section