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

Table 2.

Mean ± SD heart rate, pH, lactate, glucose, ${HCO}_{3}^{-}$ , 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
${HCO}_{3}^{-}$ (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 P < 0.001, ^†main effect time P < 0.05; ^‡condition × time interaction P < 0.001; *P < 0.01 from placebo at equivalent time point.