Table 4.
Age, anthropometric, blood and urine characteristics of the 24-hr MTBers (n = 50)
| Pre-race | Post- race | Change in absolute | Change in percent | P-value | |
|---|---|---|---|---|---|
| Male 24-hr MTBers (n = 38) | |||||
| Age (yrs.) | 38.4 ± 9.8 | ||||
| Body mass (kg) | 78.8 ± 7.7 | 77.1 ± 8.0 | −1.6 ± 1.5** | −2.0 ± 2.1** | <0.01 |
| Plasma sodium (mmol/L) | 138.0 ± 1.6 | 137.0 ± 2.6 | −1.0 ± 2.8* | −0.7 ± 2.0* | <0.05 |
| Plasma potassium(mmol/L) | 5.5 ± 1.0 | 5.0 ± 1.1 | −0.5 ± 1.3* | −7.4 ± 23.2* | <0.05 |
| Plasma creatinine (mg/dL) | 0.9 ± 0.1 | 1.2 ± 0.2 | 0.3 ± 0.2** | 32.7 ± 21.8** | <0.01 |
| Plasma creatine kinase (U/L) | 207.5 ± 92.3 | 1316.3 ± 1111.9 | 1108.9 ± 1099.1** | 590.9 ± 560.4** | <0.01 |
| Plasma creatine clearance (ml/min) | 10657.2 ± 1614.2 | 9623.2 ± 1837.4 | −1034.1 ± 1121.0* | −9.8 ± 11.7* | <0.05 |
| Urine creatinine (mmol/L) | 7.9 ± 3.7 | 18.4 ± 5.7 | 10.5 ± 6.5** | 212.3 ± 236.4** | <0.01 |
| Female 24-hr MTBers (n = 12) | |||||
| Age (yrs.) | 37.7 ± 7.4 | ||||
| Body mass (kg) | 62.1 ± 5.1 | 60.0 ± 5.4 | −1.9 ± 3.1* | −2.7 ± 5.1* | <0.05 |
| Plasma sodium (mmol/L) | 137.5 ± 2.5 | 136.6 ± 2.0 | −0.9 ± 3.0 | −0.6 ± 2.2 | 0.31 |
| Plasma potassium(mmol/L) | 5.1 ± 0.8 | 4.7 ± 0.6 | −0.5 ± 0.7* | −8.2 ± 12.0* | <0.05 |
| Plasma creatinine (mg/dL) | 0.9 ± 0.1 | 1.0 ± 0.1 | 0.1 ± 0.2 | 13.4 ± 20.0 | 0.05 |
| Plasma creatine kinase (U/L) | 148.7 ± 75.7 | 568.9 ± 293.4 | 420.2 ± 285.3** | 349.9 ± 343.7** | <0.01 |
| Plasma creatine clearance (ml/min) | 9365.7 ± 1579.9 | 8228.8 ± 2228.7 | −13.0 ± 17.3 | −12.5 ± 15.7 | 0.05 |
| Urine creatinine (mmol/L) | 5.4 ± 2.4 | 15.7 ± 4.9 | 10.3 ± 4.4** | 252.4 ± 207.8** | <0.01 |
Note: Results are presented as mean ± SD; * = P < 0.05, ** = P < 0.01