INS and sleep apnea syndrome: All subjects (7M, 1F) were young (28 ± 2 years), nonobese (height 178 ± 3 cm, weight 78 ± 6 kg, BMI 25 ± 1 kg/m2), nondiabetic (fasting glucose 5.1 ± 0.2 mmol/L; fasting insulin 26 ± 6 pmol/L; HOMA‐IR 1.0 ± 0.3), without sleep apnea (apnea hypopnea index <5 events/hour).