Table 3.
Age, anthropometric, blood and urine characteristics of the stage MTBers (n = 32)
| Pre-race | Post- race | Change in absolute | Change in percent | P-value | |
|---|---|---|---|---|---|
| Male multi-stage MTBers (n = 28) | |||||
| Age (yrs.) | 36.7 ± 6.2 | ||||
| Body mass (kg) | 76.6 ± 6.6 | 75.8 ± 6.3 | −0.7 ± 1.5* | −0.9 ± 2.0* | <0.05 |
| Plasma sodium (mmol/L) | 142.8 ± 1.9 | 140.0 ± 2.7 | −2.8 ± 2.3** | −1.9 ± 1.6** | <0.01 |
| Plasma potassium(mmol/L) | 4.4 ± 0.7 | 5.2 ± 0.5 | 0.8 ± 0.9** | 21.3 ± 21.7** | <0.01 |
| Plasma creatinine (mg/dL) | 0.9 ± 0.1 | 1.2 ± 0.5 | 0.3 ± 0.5* | 33.3 ± 64.8* | =0.01 |
| Plasma creatine kinase (U/L) | 180.7 ± 95.9 | 1009.4 ± 812.6 | 828.7 ± 821.2** | 586.8 ± 686.9** | <0.01 |
| Plasma creatine clearance (ml/min) | 10849.4 ± 1502.9 | 8953.6 ± 2447.9 | −1895.8 ± 2158.7** | −17.4 ± 19.3** | <0.01 |
| Urine creatinine (mmol/L) | 7.2 ± 3.9 | 19.7 ± 17.6 | 12.5 ± 17.5** | 245.8 ± 284.7** | <0.01 |
| Female multi-stage MTBers (n = 4) | |||||
| Age (yrs.) | 39.0 ± 7.2 | ||||
| Body mass (kg) | 65.5 ± 2.8 | 63.2 ± 2.8 | −2.3 ± 1.1* | −3.5 ± 1.6* | <0.05 |
| Plasma sodium (mmol/L) | 141.5 ± 2.4 | 138.8 ± 1.7 | −2.8 ± 2.2 | −1.9 ± 1.6 | 0.09 |
| Plasma potassium(mmol/L) | 4.7 ± 0.6 | 4.8 ± 0.4 | 0.1 ± 0.5 | 1.8 ± 10.6 | 0.84 |
| Plasma creatinine (mg/dL) | 0.8 ± 0.1 | 1.0 ± 0.1 | 0.2 ± 0.1 | 21.9 ± 15.7 | 0.68 |
| Plasma creatine kinase (U/L) | 118.9 ± 25.4 | 418.1 ± 413.3 | 299.2 ± 433.5 | 308.1 ± 454.3 | 0.26 |
| Plasma creatine clearance (ml/min) | 9862.8 ± 712.2 | 7943.8 ± 1478.1 | −1918.9 ± 1008.3* | −19.8 ± 10.8* | <0.05 |
| Urine creatinine (mmol/L) | 7.2 ± 2.6 | 17.8 ± 1.0 | 10.6 ± 2.6** | 191.7 ± 159.6** | <0.05 |
Note: Results are presented as mean ± SD; * = P < 0.05, ** = P < 0.01