Table 1.
Mean cardio-metabolic responses to 1-hour of RTY and HY exercise.
| Independent Variable | RTY (74°F/23.3°C) | HY (105°F/41.5°C) | Effect Size d |
|---|---|---|---|
| VO2 (mean; ml·kg·min−1) | 8.6 ± 0.2 | 8.9 ± 0.3 | |
| Peak VO2 (ml·kg·min−1) | 14.5 ± 0.4 | 14.9 ± 0.5 | |
| %VO2max (mean) | 23.5% ± 1.3 | 25.3% ± 2.1 | |
| RER (mean; VCO2/VO2) | 0.95 ± 0.02 | 0.89 ± 0.02 # | 0.8 (VL) |
| Total Caloric Exp. (Kcal) | 151 ± 4 | 156 ± 7 | |
| CHO-OxR (mean; g·min−1) | 0.51 ± 0.04 | 0.44 ± 0.03 # | 0.6 (L) |
| Fat-OxR (mean; g·min−1) | 0.05 ± 0.01 | 0.09 ± 0.01 # | 0.9 (VL) |
| Heart Rate (mean; bpm) | 109 ± 8 | 113 ± 8 | |
| Respiratory Rate (mean; brpm) | 21 ± 4 | 21 ± 5 |
Note. Data are presented as means ± SEM for measures recorded continuously during the exercise bout.
Abbreviations: Oxygen consumption VO2; Peak oxygen consumption achieved during each bout; Respiratory Exchange Ratio –RER; Total Caloric Expenditure –Total Caloric Exp.; Carbohydrate Oxidation Rate –CHO-OxR; Fat Oxidation Rate –Fat-OxR; Heart Rate –beats per minute, Respiratory Rate –breaths per minute.
#
significant difference between conditions for gas exchange measures (p < 0.05).
Effect sizes interpreted as follows: 0–0.1 (Negligible, N); 0.1–0.3 (Small, S); 0.3–0.5 (Moderate, M); 0.5–0.7 (Large, L); > 0.7 (Very Large, VL).