Method & evidence
The method — and its limits.
Onda doesn't sell calm as a feeling. It runs a structured protocol in the days before a high-stakes exam, built from methods tested in peer-reviewed research, and it measures whether they moved your anxiety and sleep. Here is exactly what we do, what the evidence says, and what we will not claim.
Why exam day, not exam content
Your months of study build the knowledge. Two things still degrade how you access it under pressure: acute anxiety and poor sleep the nights before. Onda targets only these two — the proximal, controllable layer — never the material itself.
The T-minus protocol
Consistent wake time, an evening wind-down, caffeine and light timing, light daytime activity — standard sleep-hygiene levers aimed at protecting the nights that matter most.
Sleep is prioritized over late cramming, plus a brief cognitive exercise that reframes pre-exam arousal as readiness rather than threat.
Five minutes of cyclic sighing — slow, exhale-emphasized breathing.
Three physiological sighs immediately before you walk in.
What the evidence says
In a Stanford randomized controlled trial (Balban et al., 2023, Cell Reports Medicine), five minutes a day of exhale-focused cyclic sighing improved mood and lowered physiological arousal more than mindfulness meditation.
A meta-analysis of 44 randomized trials in university students (Huntley et al., 2019) found structured interventions reduced test anxiety with a large effect, with the strongest support for behavioural methods — the family our protocol draws from.
The sleep components are standard, well-established sleep-hygiene levers. We make no novel claim beyond protecting consistency the nights before the event.
How we measure
We track state anxiety with the STAI-6 (Marteau & Bekker, 1992) — a validated six-item short form of the Spielberger State-Trait Anxiety Inventory — at baseline and on exam day, plus a brief nightly sleep log. The pilot is a within-subject comparison: we look at whether your own numbers move, not at a marketing average.
What we will not claim
· Onda is a wellness tool — not a medical device, and not therapy.
· We do not promise a higher score. Too many factors decide an exam result; we work only on anxiety and sleep.
· A pilot shows direction and feasibility — not proof of cause. Stronger claims need controlled study, and we will say so plainly.
· If you have a clinical anxiety disorder or phobia, this is not a substitute for professional care.
Verifiable, not just stated
We publish what the pilot finds — including when it underperforms. Outcome data is recorded so it can be checked, not merely asserted. In a field crowded with claims, that is the standard we hold ourselves to.
References
Balban et al. (2023). Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine, 4(1), 100895.
Huntley et al. (2019). The efficacy of interventions for test-anxious university students: a meta-analysis of randomized controlled trials. Journal of Anxiety Disorders.
Marteau & Bekker (1992). The development of a six-item short-form of the state scale of the STAI. British Journal of Clinical Psychology, 31(3), 301–306.