HoldsUp

Michael Grandner

Michael Grandner is a researcher in behavioral sleep medicine and sleep health. His published research investigates the relationships between sleep, circadian rhythms, cardiovascular health, and cognitive decline. Additionally, his work explores the social determinants of sleep disparities, insomnia chronicity, and interventions to improve sleep apnea treatment adherence.

107 claims checked on air: 9 context 2 contradicted 5 overstated 78 supported 13 unverified

What they said on air - contradicted

3 citing their own research

1:01:06contradictedhighWhy You Can’t Sleep (and How to Fix It) | Dr. Michael Grand

Waking up with dream recall occurs because the person woke directly out of REM sleep.

"But so if you woke up and you remember a dream, it's cuz you woke up out of REM. That's all that's all that means." (said at 1:01:06)

The assertion that recalling a dream upon waking implies that the individual woke directly out of REM sleep is contradicted by sleep physiology research. While dream reports are generally more frequent, vivid, and narrative-like following awakenings from REM sleep, substantial scientific evidence demonstrates that dreaming and successful dream recall also regularly occur upon awakening from non-rapid eye movement (NREM) sleep stages (N1, N2, and N3). Laboratory polysomnography studies show that awakening from NREM sleep yields dream recall in 40% to 70% of awakenings, sharing specific posterior cortical activation patterns with REM dreaming.

2:15:48contradictedlowWhy You Can’t Sleep (and How to Fix It) | Dr. Michael Grand

A complete sleep cycle lasts approximately 90 to 100 minutes during nocturnal sleep, but can take 2 to 3 hours during daytime sleep.

"In the middle of the at night, during your regular sleep period, that'll take, you know, 90 to 100 minutes. During the day, it might take two to three hours to make it all the way through" (said at 2:15:48)

While standard nocturnal sleep cycles typically last around 90 to 110 minutes in adult humans, available physiological sleep research shows that daytime sleep cycles do not lengthen to 2 to 3 hours. Experimental studies comparing sleep architecture across night-time and daytime sleep periods (e.g., daytime sleep following sleep deprivation or postponed sleep) indicate that the duration of individual NREM-REM sleep cycles remains relatively stable or even shortens, despite increases in slow-wave sleep intensity. No evidence supports the claim that daytime sleep cycles double or triple in duration to 2 to 3 hours.

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