An internal “ body clock ” regulates your sleep cycle, controlling when you feel tired and ready for bed or refreshed and alert. This clock operates on a 24- hour cycle known as the circadian rhythm. After waking up from sleep, you ’ ll become increasingly tired throughout the day. These feelings will peak in the evening leading up to bedtime.
PTELook at the text below. In 35 seconds, you must read this text aloud as naturally and clearly as possible. You have 35 seconds to read aloud.
Recorded Answer
Current status:
Beginning in 35 seconds.