4-7-8 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.
Round-2 tier-3 flag: thin - under 4 full-text papers.
- daily regulation practiceEmotional · 2 papers put it here (1 stated, 1 inferred)
- in-the-moment resetEmotional · 1 paper put it here
- pre-sleep wind-downSleep · 2 papers put it here (1 stated, 1 inferred)
Inhale for 4 seconds, hold for 7 seconds, exhale slowly for 8 seconds. Posture involves placing one hand on the belly and the other on the chest.
The Impact of Modifying 3D Environments: The Role of Presence in VR Breathing Exercises.
Measured in sets × time — derived from the review's own dose_and_time prose.
Inhaling for 4 seconds, holding for 7 seconds, exhaling for 8 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.
No paper compares this option with another or calls it interchangeable with one.
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.