Table 1.
Oxygen uptake and heart rate during the exercise in cold and neutral environments at baseline and during exercise.
| Walking | Running | |||
|---|---|---|---|---|
| Cold | Neutral | Cold | Neutral | |
| (ml · kg−1 · min−1) | ||||
| Baseline | 4.5 (0.9) | 3.5 (1.0)a | 4.2 (1.1) | 4.3 (1.5)a |
| 15 min | 25.4 (5.1) | 25.0 (2.6) | 36.2 (4.6) | 34.8 (4.5) |
| 30 min | 24.5 (3.2) | 25.2 (3.0) | 37.0 (5.3) | 37.3 (4.3) |
| 45 min | 24.8 (2.8) | 25.3 (2.8) | 37.8 (4.6) | 37.0 (4.0) |
| 60 min | 24.9 (3.6) | 25.4 (2.9) | 37.5 (4.2) | 37.0 (3.5) |
| (%) | ||||
| Baseline | 8.9 (1.8) | 6.6 (1.9)a | 8.1 (2.0) | 8.4 (2.9)a |
| 15 min | 48.9 (8.8) | 47.4 (5.0) | 69.0 (6.7) | 66.3 (7.1) |
| 30 min | 46.5 (5.4) | 48.1 (3.3) | 69.9 (6.5) | 71.6 (5.0) |
| 45 min | 47.2 (3.7) | 47.7 (3.6) | 70.8 (6.3) | 71.6 (6.2) |
| 60 min | 47.8 (3.6) | 48.3 (3.4) | 70.6 (4.7) | 70.5 (6.8) |
| HR (beats · min−1) | ||||
| Baseline | 68 (16) | 67 (14)a | 70 (12) | 69 (13)a |
| 15 min | 119 (18) | 128 (7) | 152 (9) | 159 (11)b |
| 30 min | 122 (15) | 133 (9) | 159 (13) | 170 (13)b |
| 45 min | 124 (12) | 136 (10) | 162 (14) | 176 (12)b |
| 60 min | 126 (14) | 140 (9) | 163 (16) | 178 (13)b |
a
Significantly lower from all other times within exercise modality (P < 0.001).
b
Significantly higher in neutral temperature compared to cold within times (P < 0.001).
Values are represented as mean (±SD).