Table 5.
Plasma lactate (mmol/L) after exercises with and without L-carnitine supplementation.
| Authors | N 1 | N 2 | Carn Dosage | Training | Mean 1 | SD 1 | Mean 2 | SD 2 | SMD | SE | 95% CI | t | p | Weight (%) | Test for Heterogeneity |
||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fixed | Random | ||||||||||||||||
| Colombani 1996 | 7 | 7 | 4 g/d. 1 d | 20 km of running | 1.3 | 0.1 | 1.40 | 0.10 | −0.936 | 0.531 | −2.092 to 0.220 | 7.11 | 7.11 | Q | 10.937 | ||
| Chun 2011 | 6 | 6 | 2 g/d. 4 w | After exercise | 7.02 | 0.52 | 6.88 | 0.68 | 0.213 | 0.535 | −0.978 to 1.404 | 7.01 | 7.01 | DF | 11 | ||
| Chun 2011 | 6 | 6 | 3 g/d. 4 w | After exercise | 6.39 | 1.64 | 6.25 | 1.05 | 0.0938 | 0.533 | −1.094 to 1.282 | 7.05 | 7.05 | Significance level | p = 0.448 | ||
| Chun 2011 | 6 | 6 | 4 g/d. 4 w | After exercise | 6.80 | 2.09 | 5.87 | 1.08 | 0.516 | 0.543 | −0.694 to 1.726 | 6.79 | 6.79 | I2 (inconsistency) | 0.00% | ||
| Chun 2011 | 6 | 6 | 5 g/d. 4 w | After exercise | 6.96 | 1.87 | 6.31 | 1.56 | 0.348 | 0.537 | −0.849 to 1.546 | 6.93 | 6.93 | 95% CI for I2 | 0.00 to 58.20 | ||
| Chun 2011 | 6 | 6 | 6 g/d. 4 w | After exercise | 6.80 | 0.98 | 6.09 | 1.16 | 0.610 | 0.547 | −0.609 to 1.829 | 6.69 | 6.69 | ||||
| Greig 1987 | 9 | 9 | 2 g/d. 2 w | After 30′ of cycling | 11.7 | 2.1 | 10.10 | 2.60 | 0.645 | 0.462 | −0.334 to 1.623 | 9.40 | 9.40 | ||||
| Greig 1987 | 10 | 10 | 2 g/d. 4 w | After 30′ of cycling | 11.8 | 4.4 | 10.70 | 3.00 | 0.280 | 0.431 | −0.625 to 1.184 | 10.80 | 10.80 | ||||
| Koozehchian2018 | 11 | 11 | 2 g/d. 9 w | Maximum exercise | 5.73 | 1.14 | 4.60 | 0.97 | 1.027 | 0.438 | 0.112 to 1.942 | 10.42 | 10.42 | ||||
| Oyono-Enguelle 1988 | 10 | 10 | 2 g/d. 4 w | After 60′ cycling | 1.72 | 0.62 | 1.68 | 0.56 | 0.0648 | 0.428 | −0.835 to 0.965 | 10.91 | 10.91 | ||||
| Watcher 2002 | 8 | 8 | 4 g/d. 12 w | Power exercise | 9.3 | 0.4 | 9.20 | 1.20 | 0.106 | 0.473 | −0.909 to 1.120 | 8.95 | 8.95 | ||||
| Wyss 1990 | 7 | 7 | 3 g/d. 1 w | Maximum exercise | 8.1 | 1.7 | 8.80 | 3.30 | −0.250 | 0.503 | −1.344 to 0.845 | 7.93 | 7.93 | ||||
| Total (fixed effects) | 92 | 92 | 0.250 | 0.142 | −0.0297 to 0.529 | 1.764 | 0.079 | 100.00 | 100.00 | ||||||||
| Total (random effects) | 92 | 92 | 0.250 | 0.142 | −0.0297 to 0.529 | 1.764 | 0.079 | 100.00 | 100.00 | ||||||||
| Authors | N 1 | N 2 | Carn. Dosage | Training | Mean 1 | SD 1 | Mean 2 | SD 2 | SMD | SE | 95% CI | t | p | Weight (%) | Test of heterogeneity | ||
| Fixed | Random | Q | 0.1252 | ||||||||||||||
| Greig 1987 | 10 | 10 | 2 g/d. 4 w | After 30′ of cycling | 11.8 | 4.4 | 10.70 | 3.00 | 0.280 | 0.431 | −0.625 to 1.184 | 49.75 | 49.75 | DF | 1 | ||
| Oyono-Enguelle 1988 | 10 | 10 | 2 g/d. 4 w | After 60′ cycling | 1.72 | 0.62 | 1.68 | 0.56 | 0.0648 | 0.428 | −0.835 to 0.965 | 50.25 | 50.25 | Significance level | p = 0.7235 | ||
| Total (fixed effects) | 20 | 20 | 0.172 | 0.304 | −0.443 to 0.787 | 0.566 | 0.575 | 100.00 | 100.00 | I2 | 0.00% | ||||||
| Total (random effects) | 20 | 20 | 0.172 | 0.304 | −0.443 to 0.787 | 0.566 | 0.575 | 100.00 | 100.00 | 95% CI for I2 | 0.00 to 0.00 | ||||||
Mm: Millimoles, l: Liter, d: Day, w: weeks; L-carn: L-carnitine, N: number of subjects, 1: subjects that did not use carn, 2: subjects used carn, g: Grams, SMD: standard mean differences, SE: standard error, CI: confidential intervals, SD: standard deviation, I2: inconsistency.