Table 3.
Exercising muscle substrate delivery and extraction as well as aerobic ATP production and muscle RQ in efficient (EF) and inefficient (IE) groups during one-legged knee-extension exercise.
| EF (n = 8) | IE (n = 9) | Effect size | Power | |
|---|---|---|---|---|
| O2 delivery (mL 100 g−1 min−1) | 7.4 (5.4, 9.4) | 7.1 (5.6, 8.7) | 0.09 | 0.04 |
| O2 extraction (%) | 60 (42, 79) | 60 (45, 74) | 0.02 | 0.03 |
| Fatty acid delivery (μmol 100 g−1 min−1) | 0.15 (0.09, 0.20) | 0.13 (0.09, 0.16) | 0.30 | 0.10 |
| Fatty acid extraction (%) | 25 (19, 33) | 15 (10, 19)∗ | 1.20 | 0.58 |
| Glucose delivery (μmol 100 g−1 min−1) | 0.20 (0.15, 0.25) | 0.20 (0.15, 0.26) | 0.05 | 0.03 |
| Glucose extraction (%) | 18 (11, 24) | 20 (1, 38) | 0.12 | 0.04 |
| Aerobic ATP production (mmol min1) | 18 (15, 22) | 18 (14, 21) | 0.13 | 0.05 |
| Muscle RQ | 0.83 (0.78, 0.88) | 0.82 (0.78, 0.86) | 0.07 | 0.04 |
Values are means (95% CI). O2, oxygen; RQ, respiratory quotient. ∗P = 0.045 between groups.