The half-life of cortisol is very short (comparable to that of cocaine): "The plasma clearance of cortisol is rapid, with a half-life of 66 min at normal hormo

The half-life of cortisol is very short (comparable to that of cocaine): "The plasma clearance of cortisol is rapid, with a half-life of 66 min at normal hormone levels. With large steroid loads, however, the half-life increases to 120 min." If you work out in the morning or afternoon, avoid working ~3-4 hours before bed, you should be able to sleep just fine.