Haematological variables and their changes, absolute performance and changes in body weight for the three trials and liquids
| H | L | W | p Value | 1 | 2 | 3 | p Value | |
|---|---|---|---|---|---|---|---|---|
| Values are mean (SD). | ||||||||
| *Differed significantly from H. | ||||||||
| **Differed significantly from trial 1. | ||||||||
| ***Differed significantly from trial 2. | ||||||||
| H, trial with high sodium concentration; L, trial with low sodium concentration; W, trial with water; MCV, mean corpuscular volume; NS, not significant. | ||||||||
| Prerun [Na+]plasma (mmol/l) | 137.3 (1.2) | 137.2 (1.2) | 137.5 (1.6) | NS | 136.8 (1.3) | 137.8 (1.1) | 137.4 (1.5) | NS |
| Postrun [Na+]plasma (mmol/l) | 134.8 (2.5) | 132.8 (1.7) | 131.3 (1.7)* | 0.00042 | 133.3 (2.8) | 132.5 (2.2) | 133.1 (2.4) | NS |
| Δ[Na+]plasma (mmol/l) | −2.5 (2.5) | −4.4 (2.5) | −6.2 (2.1)* | 0.001 | −3.5 (2.8) | −5.3 (2.3) | −4.3 (3.1) | NS |
| Δ[Na+]plasma/km (mmol/l/km) | −0.06 (0.06) | −0.11 (0.05) | −0.15 (0.05)* | 0.001 | −0.10 (0.08) | −0.12 (0.05) | −0.10 (0.07) | NS |
| Performance (km) | 39.91 (4.26) | 42.03 (4.78) | 40.55 (5.21) | NS | 36.43 (2.81) | 43.2 (3.91)** | 42.86 (4.01)** | <0.0001 |
| ΔBody weight (kg) | 2.1 (1) | 1.8 (1.2) | 1.9 (1.9) | NS | 2.4 (1.0) | 1.3 (1.1)** | 2.0 (1.2 | <0.03 |
| ΔPacked cell volume | −0.012 (0.024) | −0.018 (0.024) | −0.015 (0.019) | NS | −0.006 (0.024) | −0.028 (0.017)** | −0.010 (0.020) | <0.03 |
| ΔMCV (fl) | −0.81 (1.10) | −0.85 (0.90) | −0.58 (1.42) | NS | 0.08 (0.90) | −2.00 (0.39)** | −0.32 (0.69)*** | 0.0001 |