Comparison of change in Tre and performance between conditions
| 14°C | 16°C | 18°C | 20°C | P value† | Effect size† | P value‡ | Effect size | |
| n | 4 | 12 | 12 | 6 | Cohen’s d | Cohen’s d | ||
| No. of whose Tre fell | 3 | 11 | 10 | 4 | – | – | – | – |
| No. reaching 35°C in under 120 min (actual and predicted times) | 1 | 4 | 3 | 1 | – | – | – | – |
| Shortest time to fall to 35°C (min) (actual or predicted) | 80.76 | 50.71 | 72.00 | 98.27 | – | – | – | – |
| Mean (SD) linear rate of change of Tre (°C/hr) | −1.34 (0.31) | −1.57 (1.08) | −1.07 (0.75) | −1.38 (0.58) | 0.03* | 0.57§ | 0.43 | 0.56¶ |
| Mean (SD) time for Tre to fall to 35°C (min) (actual and predicted) | 128.46 (38.27) | 222.34 (197.43) | 408.43 (580.53) | 153.09 (74.27) | 0.34 | 0.4§ | 0.30 | 0.9** |
| Mean (SD) swim speed (m/s) | 1.17 (0.06) | 1.24 (0.10) | 1.26 (0.08) | 1.32 (0.07) | 0.22 | 0.25§ | 0.78 | 0.24¶ |
| Mean distance (SD) per stroke cycle (m) at 20 min | 2.52 (0.20) | 2.57 (0.29) | 2.63 (0.27) | 2.78 (0.40) | 0.36 | 0.19 | 0.34 | 0.24¶ |
| Mean (SD) distance per stroke cycle (m) at finish | 2.39 (0.16) | 2.51 (0.35) | 2.47 (0.23) | 2.58 (0.30) | 0.58 | 0.17 | 0.47 | 0.2 1¶ |
*Significant difference between conditions (p≤0.05).
†Between 16°C and 18°C conditions.
‡Between 18°C and 20°C conditions.
§Small/medium effect of water temperature between 16°C and 18°C conditions.
¶Small/medium effect of water temperature between 18°C and 20°C conditions.
**Medium/large effect of water temperature between 18°C and 20°C conditions.