Six studies. Eight research institutions. 2.1 million sessions across 61,000+ users. The science behind moonbird is not a marketing claim, it is data, peer-reviewed and published.
Breathing is the one autonomic function you can take over at will. When you slow it down, a chain of physiological responses follows. Your vagus nerve fires more strongly, heart rate variability rises, and the balance between your stress and recovery systems tips toward rest. These three cards are what’s happening underneath a session.
Each number comes from a single, cited source. No averages across incomparable studies, no composite scores. Every stat links to the paper it came from.
of stressed users feel noticeably better immediately after a session.
moonbird data · 2.1M sessions
better sleep quality after one month. PSQI, clinically meaningful.
Vermeylen et al. 2022
HRV gain at your personal ideal pace vs. a fixed 6.0 BPM.
moonbird internal, n=552
additional sleep per night for elite athletes during the Euros.
Red Flames pilot, 2025
preferred moonbird over a competing tactile breathing device.
Honinx et al. 2025
the HRV improvement rate for adults 50+ vs. middle-aged users.
Truesdale et al., under review
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A fixed 6 BPM is a compromise. Your resonance shifts by roughly 1 BPM within a single day. When you breathe 1–2 BPM off your ideal, HRV doesn’t plateau, it drops. Moonbird reads your heart rate continuously and finds the rate your body is in, right now.
One session at your personal pace beats a hundred at the wrong one. Rate selection, not repetition, is what drives the gain.
HRV loss increases monotonically with distance from your personal best pace. At 0.5 BPM off, you lose 21% of your gain. At 4+ BPM off, you lose 38%. This is why a generic "6 BPM for everyone" approach leaves most benefit on the table.
more likely to finish a session feeling good on personalized vs. standard exercises.
your ideal pace shifts within a single day.
better subjective sleep quality
p < .001
faster sleep onset
p < .01
more refreshing sleep
p < .001 (NRSS)
less daytime dysfunction
p < .001
Ten players from the Red Flames used moonbird through the Euros. On the nights they used it, their wearables showed more sleep, better sleep performance, and strong adherence with no coaching.
39 adults, one-month pilot. PSQI dropped three points, past the clinical threshold; subjective sleep quality improved 37% (p < .001) and daytime dysfunction fell 32% (p < .001). First peer-reviewed evidence that haptic breath pacing changes sleep in a normally-sleeping population.
read the article →
Six case studies ranging from autism-spectrum anxiety to post-burnout recovery. All six participants continued using moonbird voluntarily after the clinical study ended, pointing to sustained engagement without coach pressure, unusual for a self-regulation tool.
read the article →
36 participants compared moonbird to a competing haptic breathing device. Moonbird increased HRV, shifted EEG power toward relaxation bands, and 94% preferred it. Co-authored with Prof. Steven Laureys (University of Liege, Coma Science Group).
read the article →552 real-world users across 84 sessions. Sustained RSA gain with repetition, and a pronounced age effect: adults over 50 improved at 2.2× the rate of middle-aged users (30–49). Largest consumer-device HRV dataset published for breathwork to date.
62-participant RCT with university students across two exam periods. Breathwork was most effective precisely when subjective stress was highest, with measurable gains in negative-affect reduction and perceived control during high-pressure weeks.
Ten Belgian national-team players used moonbird through the 2025 European Championships. WHOOP-measured: +35 minutes sleep per night (p = 0.016), +5 percentage points sleep performance (p = 0.046), and 77% voluntary adherence without any coaching.
We share our data, our methods, and our device with research groups across clinical, behavioural, and sport-science domains. If you are running a study in breathwork, HRV, sleep, stress, anxiety, ADHD, or adjacent areas, we would love to hear from you.
Moonbird has already partnered with eight institutions across three countries. Six studies are published or under review. The next one could be yours.
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