The night after an ultramarathon, a runner's sleep would be expected to contain
A) the usual amounts of REM and NREM sleep.
B) more REM sleep than usual.
C) less REM sleep than usual.
D) more NREM sleep than usual.

Question

Quizplus · Accepted Answer

After an ultramarathon, a runner's body requires more physical recovery, which is facilitated by NREM sleep, particularly the deep stages of NREM sleep. Therefore, the runner would likely experience more NREM sleep than usual.

The Night After an Ultramarathon, a Runner's Sleep Would Be