You’ve heard the conflicting advice. Some experts and productivity specialists swear by the 20-minute midday nap. Others warn that napping increases your risk of metabolic problems. So what does the research actually say?
I talked with Jen Walsh, our certified health coach, about the great midday nap debate. Spoiler alert: You’ll have enough time to read this and still have time to grab your pillow or your walking shoes.
What are the benefits of a midday nap?
The power of the midday power-nap has long been documented—and adhered to by such figures as Leonardo da Vinci and Albert Einstein. “A 15-minute cat nap can improve focus, energy, mood, and short-term memory,” says Jen. “Usually, this short nap won’t affect sleep at night.”
Think of naps like a J-curve. Short naps sit at the bottom—safe, beneficial, no significant risks. But as nap duration climbs past 30 minutes, health risks become more noticeable.
✅ Short naps (15-30 minutes)
⚡ Boost focus, energy, and mood
🧠 Improve short-term memory
😴 Won’t disrupt nighttime sleep
💪 No increased health risks
⚠️ Long Naps (30+ minutes)
Research on nearly 2 million people shows naps over 30 minutes are associated with:
- 41% greater risk of high blood pressure, elevated blood sugar, and larger waist circumference
- 50% increased risk of metabolic syndrome (naps of 90-plus minutes)
- Higher rates of cardiovascular disease and all-cause mortality
The sweet spot? Keep your midday naps to under 30 minutes and ideally between 15 and 20 minutes.
Are Long Naps the Cause or the Symptom?
Both, actually.
“The research on the potential negative effects of longer midday naps speaks more to a sedentary lifestyle than the nap itself,” explains Jen. “If your nap lends itself to lounging around the rest of the day or affecting nighttime sleep, then that can lead to metabolic syndrome.”
Here’s the nuance:
Long naps may signal underlying problems:
- Poor nighttime sleep quality
- Undiagnosed sleep apnea
- Depression or hormonal issues
- Overall sedentary lifestyle
But they can also directly cause problems:
- Disruption of nighttime sleep (which creates a vicious cycle)
- Interference with circadian rhythms
- Reduction in physical activity throughout the day
- Contributes to insulin resistance
As with most health-related issues, context matters. If you’re severely sleep-deprived from, say, jet-lag or seasonal changes like Daylight Saving Time, a longer nap (90 minutes-2 hours) can help—as long as it doesn’t impair nighttime sleep. But if you’re regularly sleeping 7-9 hours at night? Long daily naps probably aren’t serving you.
What about Walks? Are They More Beneficial Than Naps?
Here’s where it gets interesting: post-meal walking might be more valuable than napping.
Research shows even 2-5 minutes of walking after eating reduces blood glucose spikes. But 15-30 minutes of moderate walking delivers even better metabolic benefits:
🚶 Prevents glucose spikes
🩸 Improves insulin sensitivity
⚡ Aids digestion
💓 Works for everyone (with or without diabetes)
Best timing? Within 60-90 minutes after eating lunch—when blood sugar peaks. The closer to finishing your meal, the better.
Bonus: After-dinner walks may have the greatest impact on overall glucose control, since insulin secretion naturally drops in the afternoon and evening.
So, You’re Saying It’s time to Siesta?
In my conversation with Jen, the ideal post-lunch routine could look something like a good ol’ fashioned siesta.
1. Eat lunch
2. Walk 10-30 minutes
- Optimizes metabolic response
- Prevents reflux (don’t lie down immediately after eating!)
- Gives your food “something to do”
3. If you need it and it fits your schedule, nap 15-20 minutes
“If someone has the time for a full-on siesta—food, walk, nap—good for them! That’s goals!” says Jen. “I’d definitely use the walk to avoid the reflux flare-up.”
The reality is that there’s more than one way to rest. It’s not all-or-nothing. For example, if you still feel tired after your post-lunch walk but don’t have time for a 15-minute nap, you could lay down with your feet propped up and close your eyes for 5 minutes. Giving your eyes and brain a short reset can provide a boost of rejuvenation to tackle your afternoon to-dos.
In Other Words, Walking or Napping Is About What Works?
“Just like with FastFit workouts, it’s about dosage and having an effective, efficient response,” says Jen. “More isn’t better.”
Here’s the summary:
Don’t nap at all? You’re probably fine—as long as nighttime sleep is solid.
Love your power nap? Keep doing it. Research supports naps under 30 minutes.
Regularly napping 60-90 minutes? Time for a reality check. You either need better nighttime sleep, more movement during the day, or a conversation with your doctor about underlying issues.
The ideal? Sleep 7-9 hours at night, walk after meals, and save short naps for when you actually need them.
Are you strength training? Effective, muscle-fatiguing strength training is the best medicine for healthy metabolism and high-quality sleep. With responsive resistance workouts from FastFit, you only need 20 minutes, 2-3x per week to stimulate your muscles so that they’re responding metabolically and ready to rest.
Remember: naps are a tool, not a requirement. And just like strength training, the most effective approach isn’t necessarily doing more—it’s doing what actually works for your body.
References
Vizmanos, B., et al. (2023). Lifestyle mediators of associations among siestas, obesity, and metabolic health. Obesity, 31(5), 1227-1239.
Yamada, T., et al. (2016). J-curve relation between daytime nap duration and type 2 diabetes or metabolic syndrome: A dose-response meta-analysis. Scientific Reports, 6, 38075.
Liu, M., et al. (2024). To nap or not? Evidence from a meta-analysis of cohort studies of habitual daytime napping and health outcomes. Sleep Medicine Reviews, 77, 101935.
Ghazizadeh, H., et al. (2020). The association between daily naps and metabolic syndrome: Evidence from a population-based study in the Middle-East. Sleep Health, 6(5), 684-689.
Zhang, S., et al. (2022). Bidirectional associations between daytime napping duration and metabolic syndrome: A nationally representative cohort study. Sleep Medicine, 100, 108-116.
Bellini, A., et al. (2022). The effects of postprandial walking on the glucose response after meals with different characteristics. Nutrients, 14(5), 1080.
DiPietro, L., et al. (2013). Three 15-min bouts of moderate postmeal walking significantly improves 24-h glycemic control in older people at risk for impaired glucose tolerance. Diabetes Care, 36(10), 3262-3268.
Reynolds, A. N., et al. (2016). Advice to walk after meals is more effective for lowering postprandial glycaemia in type 2 diabetes mellitus than advice that does not specify timing: A randomised crossover study. Diabetologia, 59, 2572-2578.
Feder, S., et al. (2023). After dinner rest a while, after supper walk a mile? A systematic review with meta-analysis on the acute postprandial glycemic response to exercise before and after meal ingestion. Sports Medicine, 53, 849-869.
Fujiwara, Y., et al. (2005). Association between dinner-to-bed time and gastro-esophageal reflux disease. American Journal of Gastroenterology, 100(12), 2633-2636.
