Sleep Experts Reveal Optimal Bedtime to Avoid “Second Wind” Phenomenon

Getting to bed at the right time could be the key to ensuring quality sleep, according to health experts. Recent research highlights how the body’s natural hormone cycle affects sleep quality, with the period between 11 p.m. and 1 a.m. being particularly crucial.

Ontario-based naturopathic doctor Kara Petrunick recently brought attention to the “second wind” theory in a viral TikTok video, warning that going to bed between 11 p.m. and 1 a.m. could disrupt hormonal balance.

“In the evening, cortisol should be at its absolute lowest because it needs to allow melatonin to be at its highest to put you in a deep, restorative sleep,” Petrunick explained. “Cortisol and melatonin work opposite each other.”

According to Petrunick, staying awake past 11 p.m. can trigger an additional spike in cortisol, the body’s stress hormone, which subsequently suppresses melatonin production. This hormonal imbalance not only makes falling asleep more difficult but may also affect sleep quality throughout the night.

“This spike will also cause a bout of hypoglycemia in the middle of the night, forcing you to wake up a few hours later,” she noted, recommending 10:30 p.m. as the optimal bedtime to prevent this secondary cortisol surge. She also suggests waking around 6:30 a.m. for optimal sleep cycle alignment.

Dr. William Lu, medical director at Dreem Health in California, confirmed that the second-wind phenomenon is indeed real and rooted in science. “The ‘second wind’ happens when your body’s circadian rhythm and homeostatic sleep pressure are out of sync,” he told Fox News Digital.

“Even if you feel tired earlier in the evening, your body can temporarily become alert due to a natural surge in cortisol and core body temperature, often a few hours before your usual bedtime,” Lu explained. This phenomenon is particularly noticeable in people who maintain irregular sleep schedules or frequently stay up late.

Sleep medicine has increasingly focused on the importance of circadian rhythms in recent years, with research showing that disruptions to these natural cycles can contribute to a variety of health problems, including increased risk of cardiovascular disease, metabolic disorders, and cognitive impairment.

Both experts emphasize that maintaining a consistent sleep schedule is crucial for preventing the second wind and promoting restorative sleep. Lu recommends going to bed and waking up at the same times every day, including weekends, to properly align the body’s circadian rhythm.

Additional strategies for improving sleep quality include avoiding late-night stimulants such as caffeine, heavy meals, and intense exercise. These activities can increase alertness and make it more difficult for the body to transition into sleep mode.

Light exposure management is another critical factor. “Keeping the lights dim and limiting screen time can help induce sleepiness, as light exposure suppresses melatonin and can shift your internal clock later,” according to Lu. The blue light emitted by electronic devices is particularly disruptive to melatonin production.

Implementing a calming pre-sleep routine can also signal to the body that it’s time to rest. Activities like reading, meditation, or gentle stretching about 60-90 minutes before bedtime can help prepare both mind and body for sleep.

“The best time to go to bed to avoid the second wind is one that matches your body’s melatonin surge, promoting faster sleep onset,” Lu said. “This avoids the late-night alertness spike and supports restorative deep sleep in the first half of the night, which is critical for cardiovascular, metabolic and cognitive health.”

As sleep disorders continue to affect millions of Americans, with the CDC reporting that about one-third of adults don’t get enough sleep on a regular basis, understanding the body’s natural sleep rhythms becomes increasingly important for public health.