Emotional cycle
28-day cycle
The emotional cycle is conventionally assigned a 28-day period. The heart-region display is an editorial symbol, not evidence that emotions follow this schedule.
Point 2 of 3 in Biorhythm Cycles
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Swoboda, Fliess, and Tomcshario biorhythm history (scholarly_modern)
Documents the historical 23-, 28-, and 33-day biorhythm proposals and their later treatment as pseudoscience; see Hines, chapter 5.