Repeated High Intensity Bouts with Long Recovery: Are Bicarbonate or Carbohydrate Supplements an Option?
Table 1
Blood lactate, blood gases, pH, and base excess (BE) associated with four interventions at rest, pre-warm-up, post-warm-up, and before and after the three high intensity bouts (mean ± SD).
Rest
Before warm-up
Warm-up
After bout 1
Before bout 2
After bout 2
Before bout 3
After bout 3
Blood lactate (mmol/L)
PASSIVE
1.2 ± 0.3
1.3 ± 0.2
3.3 ± 1.6
14.8 ± 2.0
15.2 ± 2.2
14.4 ± 2.5
ACTIVE
1.4 ± 0.6
1.3 ± 0.3
3.0 ± 1.2
14.2 ± 2.8
5.4 ± 2.4
13.6 ± 1.9
5.0 ± 1.5
13.0 ± 1.8
CHO
1.2 ± 0.2
1.3 ± 0.2
3.1 ± 1.4
15.0 ± 2.0
6.2 ± 2.2
14.1 ± 2.3
5.8 ± 1.8
14.0 ± 2.0
BIC
1.2 ± 0.4
1.4 ± 0.5
3.7 ± 1.6
15.6 ± 2.4
6.0 ± 1.5
pH
PASSIVE
7.41 ± 0.02
7.41 ± 0.01
7.41 ± 0.02
7.16 ± 0.04
7.16 ± 0.04
7.15 ± 0.06
ACTIVE
7.43 ± 0.02
7.43 ± 0.03
7.41 ± 0.03
7.18 ± 0.05
7.39 ± 0.04
7.19 ± 0.05
7.39 ± 0.05
7.19 ± 0.04
CHO
7.43 ± 0.02
7.43 ± 0.01
7.42 ± 0.02
7.16 ± 0.07
7.36 ± 0.05
7.19 ± 0.06
7.36 ± 0.06
7.17 ± 0.05
BIC
7.41 ± 0.01
(mmol/L)
PASSIVE
24.2 ± 1.3
24.0 ± 1.1
21.6 ± 1.7
12.0 ± 2.0
9.4 ± 2.3
ACTIVE
24.2 ± 1.7
24.4 ± 1.6
21.9 ± 1.7
13.0 ± 2.4
18.1 ± 3.3
11.4 ± 2.3
18.4 ± 2.1
11.8 ± 1.5
CHO
24.2 ± 1.2
24.1 ± 1.5
21.6 ± 2.2
12.2 ± 1.9
17.8 ± 2.9
11.9 ± 1.9
18.4 ± 2.5
11.5 ± 2.3
BIC
24.5 ± 1.4
24.3 ± 1.2
BE (meq/L)
PASSIVE
−1.7 ± 1.2
−1.5 ± 1.2
−4.4 ± 1.8
−16.8 ± 2.2
−19.7 ± 3.1
ACTIVE
−1.6 ± 1.4
−1.6 ± 1.5
−4.1 ± 1.8
−15.5 ± 3.0
−8.2 ± 3.8
−17.0 ± 2.8
−7.7 ± 2.3
−16.5 ± 2.0
CHO
−1.5 ± 1.3
−1.6 ± 1.2
−4.3 ± 2.3
−16.5 ± 2.4
−8.4 ± 3.3
−16.6 ± 2.6
−7.7 ± 2.8
−17.2 ± 3.0
BIC
−1.4 ± 1.3
−1.1 ± 1.1
−14.3 ± 2.8
PO2 (mmHg)
PASSIVE
78.3 ± 5.7
78.5 ± 5.9
82.6 ± 4.4
93.2 ± 5.9
83.6 ± 7.9
95.8 ± 7.2
84.9 ± 8.5
98.2 ± 7.6
ACTIVE
81.4 ± 9.3
80.1 ± 8.3
82.0 ± 4.7
91.7 ± 9.8
79.4 ± 3.4
95.9 ± 4.8
78.5 ± 5.4
94.7 ± 6.2
CHO
83.3 ± 8.3
81.2 ± 8.1
84.7 ± 4.5
94.1 ± 5.5
81.0 ± 5.0
93.0 ± 4.1
77.0 ± 5.1
93.2 ± 6.0
BIC
81.7 ± 7.5
81.1 ± 7.7
80.0 ± 5.9
89.6 ± 6.1
77.3 ± 8.2
90.2 ± 7.0
77.2 ± 6.9
91.6 ± 5.0
PCO2 (mmHg)
PASSIVE
38.5 ± 2.2
38.7 ± 2.0
35.8 ± 2.1
34.2 ± 5.4
28.0 ± 3.2
28.4 ± 2.6
ACTIVE
37.9 ± 3.3
37.1 ± 3.5
36.3 ± 2.8
35.4 ± 4.7
32.2 ± 3.6
30.5 ± 3.6
32.0 ± 2.7
31.6 ± 2.9
CHO
37.8 ± 1.9
37.5 ± 1.1
35.7 ± 3.4
33.8 ± 4.9
31.7 ± 2.6
32.0 ± 1.8
32.2 ± 2.7
31.9 ± 3.1
BIC
39.0 ± 3.0
39.5 ± 3.7
38.5 ± 3.2
37.7 ± 5.9
33.4 ± 2.9
33.8 ± 3.0
32.4 ± 4.2
Different to all other interventions. †Different to CHO. ‡Different to ACTIVE. Different to PASSIVE.
