Table 2.
Changes in blood indices of acid–base balance and plasma lactate concentration induced by the repeated sprint test (4 × 15 s) in sprinters (n = 16) after 4-week supplementation with placebo (PL) or green tea extract (GTE)
| PL | GTE | |||
|---|---|---|---|---|
| Rest | 3 min | Rest | 3 min | |
| pH | 7.41 ± 0.004 | 7.18 ± 0.01*** | 7.42 ± 0.006 | 7.17 ± 0.01*** |
| Base excess (mmol/L) | 0.67 ± 0.18 | −16.24 ± 0.50*** | 1.04 ± 0.24 | −16.9 ± 0.50*** |
| Anion gap (mmol/L) | 15.12 ± 0.30 | 30.61 ± 0.48*** | 14.79 ± 0.16 | 30.26 ± 0.39*** |
| Lactate (mmol/L) | 1.84 ± 0.12 | 17.99 ± 055*** | 1.84 ± 0.12 | 18.69 ± 0.45*** |
Values are presented as mean ± SEM. Blood samples were collected before the test (at rest) and 3 min after the test (3 min). The data were analyzed using two-way ANOVA: two treatment (placebo and GTE) × two time points (at rest and 3 min after completion of the test). Time effect was observed for all the analyzed parameters (p < 0.001) with no treatment and time × treatment interactions (p > 0.05)
*** Significantly different (p < 0.0001) from the resting value (Bonferroni test)