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. 2018 Oct 14;6(19):e13818. doi: 10.14814/phy2.13818

Table 2.

Mean ± SD heart rate, pH, lactate, glucose, HCO3, and base excess response during the placebo and NaHCO3 conditions

Baseline Pre FHST Set 1 Set 2 HT Set 3 Set 4 Post FHST
Heart rate (beats·min−1)
Placebo 160 ± 9 165 ± 10 168 ± 10 171 ± 11 173 ± 10 168 ± 11 170 ± 10 170 ± 11
NaHCO3 159 ± 11 169 ± 9 166 ± 12 167 ± 14 166 ± 15 165 ± 12 167 ± 13 168 ± 10
pH# , ,
Placebo 7.403 ± 0.015 7.400 ± 0.028 7.379 ± 0.046 7.395 ± 0.048 7.346 ± 0.074 7.400 ± 0.032 7.401 ± 0.041 7.339 ± 0.063
NaHCO3 7.407 ± 0.012 7.480 ± 0.018* 7.454 ± 0.028* 7.466 ± 0.038* 7.397 ± 0.060* 7.471 ± 0.030* 7.465 ± 0.028* 7.408 ± 0.050*
Lactate (mmol·L−1)
Placebo 1.0 ± 0.3 1.1 ± 0.2 4.6 ± 1.6 4.8 ± 1.1 7.2 ± 1.8 4.7 ± 1.3 4.9 ± 1.5 7.7 ± 1.7
NaHCO3 1.0 ± 0.2 1.1 ± 0.4 4.9 ± 2.1 5.1 ± 1.4 8.2 ± 2.4 5.1 ± 1.6 5.5 ± 1.6 7.5 ± 2.7
Glucose (mmol·L−1)
Placebo 3.7 ± 0.6 4.0 ± 0.4 4.7 ± 1.0 5.1 ± 1.3 4.8 ± 1.2 4.9 ± 1.2 5.5 ± 1.3 5.2 ± 1.2
NaHCO3 4.1 ± 0.6 3.7 ± 0.9 4.4 ± 1.7 5.2 ± 1.2 4.8 ± 1.3 4.9 ± 1.4 5.2 ± 1.0 4.7 ± 1.11
HCO3 (mmol·L−1)# , ,
Placebo 25.7 ± 1.2 25.4 ± 1.7 18.8 ± 1.8 19.5 ± 2.6 15.9 ± 2.0 20.0 ± 2.1 19.4 ± 2.49 16.8 ± 1.6
NaHCO3 25.9 ± 1.4 31.4 ± 1.4* 24.3 ± 1.9* 25.6 ± 2.1* 22.0 ± 2.3* 25.4 ± 2.4* 25.6 ± 3.1* 21.7 ± 2.9*
Base excess (mmol·L−1)# , ,
Placebo 1.4 ± 1.0 1.1 ± 1.4 −5.4 ± 2.1 −4.6 ± 2.7 −8.8 ± 2.5 −4.1 ± 2.1 −4.6 ± 2.5 −7.9 ± 1.8
NaHCO3 1.6 ± 1.2* 7.6 ± 1.3* 0.7 ± 1.9* 2.1 ± 1.9* −2.2 ± 2.7* 1.9 ± 2.4* 2.0 ± 2.9* −2.3 ± 3.1*

NaHCO3, sodium bicarbonate; Pre FHST, The first Field Hockey Skill Test prior to running; HT, Half‐time; Post FHST, The final Field Hockey Skill Test at the end of running.

#main effect condition < 0.001, main effect time < 0.05; condition × time interaction < 0.001; *P < 0.01 from placebo at equivalent time point.