Table 3.
Energy expenditure and substrate metabolism during overground and treadmill running at same speed for middle-aged women (mean ± SD).
| Speed | 7(km/h) | 8(km/h) | 9(km/h) | |||
|---|---|---|---|---|---|---|
| Variable | OG | TM | OG | TM | OG | TM |
| CHO oxidation (g/min) | 1.31 ± 0.53aabb | 1.16 ± 0.44ddee | 1.74 ± 0.65**cc | 1.36 ± 0.49ff | 2.03 ± 0.69** | 1.73 ± 0.64 |
| Fat oxidation (g/min) | 0.32 ± 0.17aabb | 0.35 ± 0.16ddee | 0.27 ± 0.19**cc | 0.34 ± 0.18ff | 0.25 ± 0.19** | 0.29 ± 0.20 |
| Contribution of fat (%) | 42.68 ± 20.16aabb | 46.13 ± 20.13ddee | 32.62 ± 22.41**cc | 41.98 ± 19.59ff | 27.59 ± 20.38** | 33.41 ± 21.32 |
| EE (kcal/min) | 8.10 ± 1.25aabb | 7.75 ± 1.13ddee | 9.36 ± 1.40**cc | 8.54 ± 1.21ff | 10.33 ± 1.55** | 9.54 ± 1.36 |
| VO2 (ml/min/kg) | 27.36 ± 2.64aabb | 26.77 ± 2.99ddee | 30.83 ± 2.99**cc | 29.28 ± 2.86ff | 33.78 ± 3.59** | 31.74 ± 2.87 |
| HR (beats/min) | 147 ± 17aabb | 144 ± 20ddee | 157 ± 17**cc | 152 ± 18ff | 165 ± 14** | 159 ± 17 |
**p < 0.01 overground running vs. treadmill running with speed of 7, 8, and 9 km/h. aap < 0.01 overground running of 7 vs. 8 km/h. bbp < 0.01 overground running of 7 vs. 9 km/h. ccp < 0.01 overground running of 8 vs. 9 km/h. ddp < 0.01 treadmill running of 7 vs. 8 km/h. eep < 0.01 treadmill running of 7 vs. 9 km/h. ffp < 0.01 treadmill running of 8 vs. 9 km/h.