Table 1.
Participant characteristics and environmental conditions per race
| Marathon | 20KRW | 50KRW | ||||
| Women | Men | Women | Men | Women | Men | |
| Participants | ||||||
| n | 15 | 14 | 16 | 16 | 5 | 17 |
| Age (years) | 32.6±6.0 | 30.6±3.3 | 26.2±5.8 | 28.0±4.0 | 29.0±4.8 | 29.9±5.4 |
| Height (cm) | 162±5 | 176±7 | 162±7 | 179±7 | 167±6 | 179±7 |
| Body mass (kg) | 48.3±4.3 | 60.8±4.5 | 50.6±4.1 | 64.9±5.8 | 55.8±5.9 | 67.5±6.5 |
| Environmental conditions | ||||||
| Temperature (°C) | 32.0±0.7 | 29.3±0.5 | 31.6±0.8 | 32.7±0.2 | 31.1±0.5 | 31.1±0.5 |
| RH (%) | 77.9±2.3 | 46.3±1.0 | 76.6±3.2 | 80.6±1.1 | 75.7±3.0 | 75.7±3.0 |
| Wind speed (m.s−1) | 0.1±0.2 | 0.4±0.5 | 0.3±0.4 | 1.7±0.4 | 0.4±0.7 | 0.4±0.7 |
| WBGT (°C) | 29.6±0.3 | 23.5±0.4 | 28.9±0.5 | 30.6±0.3 | 28.2±0.9 | 28.2±0.9 |
| Start time (hour:min) | 23:59 | 23:59 | 23:59 | 23:30 | 23:30 | 23:30 |
| Loop (km) | 6×7 km | 20×1 km | 25×2 km | |||
| Performance | ||||||
| Personal best (hour:min:s) | 2:30:33±0:02:51 | 2:11:40±0:03:11 | 1:29:01±0:02:27 | 1:19:35±0:01:22 | 4:21:37±0:09:44 | 3:49:26±0:04:46 |
| Finish time (hour:min:s) | 2:48:39±0:09:53 | 2:21:35±0:06:49 | 1:38:59±0:03:57 | 1:33:32±0:06:06 | 5:04:17±0:23:13 | 4:22:28±0:11:09 |
| Finish time (%PB) | 112.3±4.9 | 107.5±4.4 | 112.1±4.5 | 118.2±6.3 | 117.7±5.4 | 114.3±3.8 |
| DNF (medical) | 6 (5) | 0 (0) | 3 (1) | 2 (1) | 2 (2) | 5 (3) |
| DQ | – | – | 1 | 2 | 0 | 2 |
DNF (medical) means went to the medical tent (most common reasons were cramps for 5/12 and gastrointestinal issues for 4/12); DQ (during race-walk).
Values in n or mean±SD for the study participants.
DNF, did not finish; DQ, disqualified; 20KRW, 20 km race-walk; 50KRW, 50 km race-walk; %PB, percentage of personal best; RH, relative humidity; WBGT, wet-bulb globe temperature.