The present study examined the differences of self‐ratings of 4h sleep in three states: L‐WE,
where the percentage of waking time and urinary epinephrine are low (< 20% waking time);
H‐W, where the percentage of waking time and epinephrine levels increase along the basal
regression line as determined by a previous study (20–100% waking time and< 7 ng/min); H‐
E, where epinephrine levels increase more than expected from the basal regression line for
the two parameters (> 7 ng/min). Eight healthy male subjects participated twice in a 4 h …