Box breathing or 4-7-8: which is better?
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Box for daytime focus, 4-7-8 for bed. Neither has a big trial behind it, and in the one study that tried both, six breaths a minute beat them on HRV. If you want the best tested pattern for stress, do cyclic sighing.
These are two of the most searched breathing patterns, and people argue about them like rival teams. They’re more alike than different. Both are slow, both have a hold, and both have been tested far less than their fame suggests.
What we’d do
Use box breathing when you’re up and need to stay sharp, before a call or in a queue, since the equal counts are easy to keep with your eyes open. Use 4-7-8 lying in bed, four breaths, since its long out-breath points you toward sleep. For a daily practice, do cyclic sighing.
Side by side
| Box breathing | 4-7-8 | |
|---|---|---|
| The counts | 4 in, 4 hold, 4 out, 4 hold | 4 in, 7 hold, 8 out |
| Breaths a minute | 3.75 | About 3.2 |
| Out-breath against in-breath | Equal | Twice as long |
| How long a set is | 5 minutes, about 19 boxes | 4 breaths, about 76 seconds, for the first month |
| Month-long trial | One group of 21 people, mood not clearly better than meditation | None |
| Best for | Focus, daytime, eyes open | Winding down, bed |
The one study that tried both
In 2025, researchers had 84 students do square breathing, 4-7-8 and six breaths a minute, one session each. Six a minute raised HRV more than either of the other two, with small to medium effects. None of the three changed mood or blood pressure in one sitting, and the published summary doesn’t say which of those two came out ahead.
Box breathing also had a turn in the 2023 Stanford trial. Over 28 days its group’s good mood rose, but not clearly more than meditation’s, while cyclic sighing was clearly ahead.
Why the out-breath tips it
Your heart speeds up a little on every in-breath and slows on every out-breath. In 4-7-8 the out-breath is twice the in-breath, so more of every minute goes to slowing down. In a 2014 lab study, 30 people breathed six times a minute with either a short in-breath and long out-breath (3 seconds in, 7 out) or the reverse. The long out-breath felt more relaxing and raised the high-frequency part of HRV more.
Box is the steady one. Equal sides are easy to count when you’re doing something else, a bit like walking in step. 4-7-8 is lopsided on purpose, more like the long sigh you let out when you finally sit down in the evening.
Both are slower than you might think
At 3.75 and 3.2 breaths a minute, both run well under six a minute, where your heart’s swing with each breath peaks. That isn’t a problem if they feel good. If the holds feel long, shorten the counts and keep the shape. Weil’s handout says the ratio of 4:7:8 matters more than the speed.
Try any counts in pattern speed. The steps for each are in how to do box breathing and how many times to do 4-7-8.
Box breathing and 4-7-8 breathing each have a mini guide, with the history and every study.
5 sources
- Marchant J et al., Comparing the effects of square, 4-7-8, and 6 breaths-per-minute breathing conditions on heart rate variability, CO2 levels, and mood, Applied Psychophysiology and Biofeedback, 2025pubmed.ncbi.nlm.nih.gov
- Balban MY et al., Brief structured respiration practices enhance mood and reduce physiological arousal, Cell Reports Medicine, 2023pmc.ncbi.nlm.nih.gov
- Andrew Weil, 4-7-8 Breath, Andrew Weil Center for Integrative Medicine, University of Arizonaawcim.arizona.edu
- Van Diest I et al., Inhalation/exhalation ratio modulates the effect of slow breathing on heart rate variability and relaxation, Applied Psychophysiology and Biofeedback, 2014pubmed.ncbi.nlm.nih.gov
- Shaffer F, Meehan ZM, A practical guide to resonance frequency assessment for heart rate variability biofeedback, Frontiers in Neuroscience, 2020pmc.ncbi.nlm.nih.gov
