Table 4.
Results of the twin individual-based analysis
| PFO (g/min) | PFO (mg/kg LBM/min) | RFO (g/min) | RFO (mg/kg LBM/min) | |
|---|---|---|---|---|
| Body composition | ||||
| BMI (kg/m2) |
r = 0.12 p = 0.53 |
r = 0.054 p = 0.76 |
r = 0.16 p = 0.25 |
r = 0.079 p = 0.58 |
| Lean body mass (kg) |
r = 0.41 p = 0.007 |
r = 0.33 p = 0.12 |
||
| Fat mass (kg) |
r = − 0.13 p = 0.57 |
r = − 0.091 p = 0.66 |
r = 0.08 p = 0.63 |
r = 0.10 p = 0.48 |
| Self-reported leisure time physical activity | ||||
| 12-month LTMET-index (MET-h/day) |
r = 0.26 p = 0.034 |
r = 0.10 p = 0.41 |
r = 0.14 p = 0.23 |
r = − 0.08 p = 0.46 |
| 3-year-LTMET-index (MET-h/day) |
r = 0.30 p = 0.081 |
r = 0.20 p = 0.26 |
r = 0.22 p = 0.13 |
r = 0.05 p = 0.32 |
| Baecke questionnaire (score) |
r = 0.40 p = 0.022 |
r = 0.25 p = 0.13 |
r = 0.002 r = 0.98 |
r = − 0.15 p = 0.24 |
| Cardiorespiratory fitness | ||||
| VO2peak (l/min) |
r = 0.51 p = 0.028 |
r = 0.21 p = 0.30 |
||
| VO2peak (ml/kg LBM/min) |
r = 0.36 p = 0.085 |
r = − 0.006 p = 0.97 |
||
| Fat oxidation during exercise | ||||
| PFO (g/min) |
r = 0.30 p = 0.14 |
|||
| PFO (mg/kg LBM/min) |
r = 0.29 p = 0.12 |
|||
| Glucose homeostasis and insulin sensitivity | ||||
| Fasting glucose (mmol/l) |
r = − 0.11 p = 0.42 |
r = − 0.16 p = 0.26 |
r = 0.084 p = 0.60 |
r = 0.05 p = 0.80 |
| Fasting insulin (µU/l) |
r = − 0.17 p = 0.33 |
r = − 0.13 p = 0.48 |
r = -0.10 p = 0.59 |
r = − 0.079 p = 0.63 |
| Matsuda index |
r = 0.10 p = 0.60 |
r = 0.026 p = 0.91 |
r = 0.18 p = 0.29 |
r = 0.067 p = 0.67 |
| Insulin AUC (µU/l/h) |
r = − 0.42 p = 0.015 |
r = − 0.35 p = 0.055 |
r = − 0.04 p = 0.85 |
r = 0.12 p = 0.58 |
| Glucose AUC (mmol/l/h) |
r = − 0.31 p = 0.050 |
r = − 0.27 p = 0.11 |
r = 0.21 p = 0.082 |
r = 0.31 p = 0.019 |
AUC area under the curve, BMI body mass index, LBM lean body mass, MET metabolic equivalent of task, OGTT oral glucose tolerance test, PFO peak fat oxidation, REE resting energy expenditure, RER respiratory exchange ratio, RFO resting fat oxidation, VO2peak peak oxygen uptake