Box breathing
At least one paper behind this review states what this option was measured against. That is not a ranking, and this option carries no evidence profile of its own.
- acute stress / anxiety downregulationEmotional · 2 papers put it here (1 stated, 1 inferred)
- daily regulation practiceEmotional · 2 papers put it here (1 stated, 1 inferred)
- pre-sleep wind-downSleep · 1 paper put it here
Inhale (4 seconds) → hold (4 seconds) → exhale (4 seconds) → hold (4 seconds). Guided by audiovisual cues during a 60-second rest period following a 30-second exercise bout, repeated for a total of 15 minutes.
Box breathing or six breaths per minute: Which strategy improves athletes post-HIIT cardiovascular recovery?Deep inhalation through the nose for 4 seconds, hold for 4 seconds, slow exhalation through the mouth for 4 seconds, hold again for 4 seconds.
The Impact of Modifying 3D Environments: The Role of Presence in VR Breathing Exercises.Equal duration of inhalations, breath retentions, and exhalations. Posture: Sit or lie down with eyes closed, focusing on forehead. Duration: 5 minutes. Breath ratio determined by CO2 tolerance test.
Brief structured respiration practices enhance mood and reduce physiological arousal
Nothing states what this option's dose measures — no library step prescribes this option and its review states no dose unit.
Four-part sequence with each part lasting four seconds.
The Impact of Modifying 3D Environments: The Role of Presence in VR Breathing Exercises.
Equipment is a property of the movement and is authored, never derived from the evidence corpus (docs/research/round2/ROUND2_KNOWN_CORRECTIONS.md §1). This option resolves to no catalogue exercise, so nothing has authored it yet.
R8's level field records who was eligible for the trial, not what a person needs before trying the practice, so it is not carried here.
No row states how to make this option harder or easier.
The papers behind this option report nothing on contraindications, which is not the same as saying there are none.
No row describes the setting.
- Sigh-based (physiological / cyclic) — a paper measured this option against it“and cyclic hyperventilation with retention” · Melis Yilmaz Balban, E. Neri, Manuela M. Kogon et al. (2023) · 10.1016/j.xcrm.2022.100895
A paper measuring one option against another does not make the two interchangeable, and it does not say which to choose. These are listed as what the papers did, and nothing here proposes a substitution.